Q: I would like to purchase a new camera of another brand, is it possible to change the mount of my previous Sigma lenses?

A: Sigma produces lenses with exclusive fixed mount systems; therefore it is not possible to change the mount of a majority of Sigma lenses. However with the new Mount Conversion Service, any of the Global Vision Lenses can be converted to a different mount system. More details can be found in the Mount Conversion Service information tab in the Support section.

Q: Can I buy directly from Sigma?

A: Sigma Imaging (UK) Ltd is the importer and distributor for Sigma photographic equipment, therefore we are unable to sell directly to the end-user. We do however have a detailed list of our stockists which can be found here.

Q: I have just purchased one of your DC lenses but I am getting a black line around the edge of my pictures. Is the lens faulty?

A: Sigma’s DC lenses are designed to work on digital SLR cameras with an image sensor which is smaller than 35mm film (known as APS-C size). If you use one of these lenses on a film or full frame digital SLR, you will get a line (called vignetting) around the edge of the picture. Please use a lens from our DG range as these will be suitable.

Q: Can you send me a printed lens brochure?

A: Yes, just phone or email us and we will post you a printed brochure. Alternatively, click here to download a PDF version.

Q: Where are Sigma lenses made?

A: All Sigma products, lenses, cameras and flash units are manufactured exclusively by Sigma in Sigma’s own factory in Aizu, Japan. No Sigma Corporation product – lens, camera or flash – is manufactured outside of Japan. This is very unusual these days, as most companies have at least some of their products produced outside of Japan because of cost considerations.

Q: I would like to use a filter on my 15mm fisheye lens but I can only use a gelatine filter, why is this and where can I buy them?

A: Due to the ultra wide angle shooting capabilities of lenses such as the 15mm, front filter use simply is not possible. It would damage the front element of the lens and cause heavy vignetting on the images. Gelatine filters are available from the following website: http://www.galvoptics.fsnet.co.uk.

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A: The DG designation indicates that the lens has been optimised for use with digital SLR cameras. The DG lenses feature improved (more even) light distribution from image centre to edge, especially at maximum aperture, compared to conventional fast wide-angle lenses. This is important in digital photography, but is also useful in 35mm photography, especially when slide film is used. The lens elements also utilise Sigma’s super multi layer coating which reduces flare and internal reflections from the highly sensitive surface of image sensors.

Q: I understand Sigma make 1.4x and 2x tele-converters. Do these converters work on all Sigma lenses?

A: Our tele-converters are matched to work with a few Sigma EX telephoto lenses and are therefore not compatible with all our lenses. For a full chart of compatible lenses, click here.

Q: I would like to purchase a new camera of another brand, is it possible to change the mount of my previous Sigma lenses?

A: Sigma produces lenses with exclusive fixed mount systems; therefore it is not possible to change the mount of a majority of Sigma lenses. However with the new Mount Conversion Service, any of the Global Vision Lenses can be converted to a different mount system. More details can be found in the Mount Conversion Service information tab in the Support section.

Q: I have just purchased your 18-125mm OS lens which I am very happy with however there is a buzzing noise which occurs even when the OS is switched off. This also remains for about 1 minute after the camera is switched off. Is the lens faulty?

A: It is normal for this lens to make a slight buzzing noise. Please refer to the lens’ instruction leaflet for further details.

Q: There are many abbreviations used by Sigma in the name of your lenses, such as APO and DG. Can you explain what these mean?

A: Each abbreviation has its own meaning and is an important part of the lens’ construction and design. For detailed descriptions of each abbreviation, please click here to visit the lens technology page on this website.

Q: What is the difference between DG and DC lenses?

A: The designation DG indicates that the lens has been optimised for digital SLRs but is equally compatible with film SLR cameras. These will work on digital SLRs with a small (APS-C size) image sensor, digital SLRs with a full frame sensor and film SLRs. DC lenses are designed specifically for digital SLRs with the small, APS-C size image sensor. These are not suited for full frame digital or film SLRs as heavy vignetting will occur.

Q: What are the differences between the 70-300mm F/4-5.6 DG Macro and the 70-300 F/4-5.6 APO DG Macro zoom lenses?

A: The major difference between these two lenses is the optical performance. The DG model features a more conventional, achromatic optical design and uses one element of Special Low Dispersion glass (SLD). Its sharpness and contrast are rated very highly, however it is not quite as good as the APO model, which uses an apochromatic optical design and uses three SLD glass elements. This model has been top-rated by independent photo magazines. The APO DG model is also somewhat more expensive than the DG model. If you plan to make very large enlargements from your negatives, slides or digital files, the APO DG lens may be your better choice.

Q: What is the difference between built-in HSM lens and DC-motor lens?

A: With conventional auto-focusing, auto-focus is driven by electromagnetic force of a DC-motor, gear and shaft mechanism. However, Ultrasonic Oscillation Energy operates the HSM lens and creates high-torque drive. Since this motor has no reduction gears, it has much quicker response to start and stop compared to DC- motor lenses. HSM system has virtually silent auto focus function, very quick responsive auto focus function and “full-time” manual focus, wherein AF can be overridden without disengaging the AF mode altogether.

Q: What is the meaning of W and T symbols on the depth of field scale?

A: W indicates wide focal length and T indicates telephoto. For example on a 28-80mm zoom lens W is equal to 28mm and T is corresponding to 80mm. Depth of field region can be determined by combination of depth of field scale and distance scale. The depth of field scale is printed on depth of field scales on the right and left sides of the centre index line. These figures show the depth of field for each aperture setting. The range between numbers of the same f-number is the depth of field. For instance, choose the aperture, f22 and rotate the zoom control to the wide position until it stops and focus the lens on a subject. The distance from the camera to the subject will be shown on the distance scale by the centre index line. Therefore, the region between the right and left sides of the centre index, which will be in the range of the same f-number at the chosen aperture, will be in-focus. The same process also can be applied for tele-position. Set the focal length to tele-position, choose the aperture, f22. You would see the range on the distance scale, which corresponds to the depth of field.

Q: I have just purchased a new Sigma optically stabalised lens and notice that the lens makes a slight noise when I half press the shutter button. Is that normal?

A: OS lenses do make a soft noise upon start up. This noise emits whilst the OS system is setting into position. Once the OS is set, generally after one or two seconds, the noise will stop. This is completely normal for OS lenses.

Q: Where are Sigma lenses made?

A: All Sigma products, lenses, cameras and flash units are manufactured exclusively by Sigma in Sigma’s own factory in Aizu, Japan. No Sigma Corporation product – lens, camera or flash – is manufactured outside of Japan. This is very unusual these days, as most companies have at least some of their products produced outside of Japan because of cost considerations.

Q: I am looking to buy a macro lens and I notice Sigma offer different types. How do I choose between them?

A: Each of the Sigma prime macro lenses offer up to 1:1 (Life-size) reproduction images, but at different working distances. For example, the 50mm lens provides the shortest working distance and the 180mm lens the longest working distance. Therefore, if you are looking to do copy or reproduction work, the 50mm is likely to be your best choice. If however you photograph small insects, the 150mm or 180mm may be better suited as these allow you to stand a little further away from the subject whilst still giving you the same image. This may prevent disturbing the insect. All provide excellent optical performance, and are fully compatible with current 35mm AF and digital SLR cameras.

Q: I would like to use a filter on my 15mm fisheye lens but I can only use a gelatine filter, why is this and where can I buy them?

A: Due to the ultra wide angle shooting capabilities of lenses such as the 15mm, front filter use simply is not possible. It would damage the front element of the lens and cause heavy vignetting on the images. Gelatine filters are available from the following website: http://www.galvoptics.fsnet.co.uk.

Q: I recently purchased a new Sigma lens from a local dealer. When I received the lens I noticed that it came without a warranty. When I inquired to the dealer about this, he told me not to worry as Sigma will still honour the warranty. Is this true?

A: The lens you received has a serial number which has not been issued by Sigma’s factory in Japan. It appears that the lens you received is a “Grey Market” lens, and has been tampered with having its serial number changed. This would explain why you received no factory warranty card with the lens; the serial number printed on the warranty card at the factory, would not match the number on your lens. The Sigma lens should always be supplied with the factory warranty card, which is necessary to help verify the factory warranty. This altered serial number has implications for the Sigma one-year warranty. We suggest that you contact the dealer regarding this situation, immediately.

Q: Auto Focus of HSM Lens for some Nikon Cameras does not work.

A: The AF control system for some Nikon Cameras does not work with HSM lenses. Sigma’s HSM lenses have full compatibility with F5, F4 series, F100, F90/N90, F90X/N90S, F80/N80 F70/N70, u/F65/N65,Pronea 600 and Pronea S. With other Nikon cameras, Sigma’s HSM version lenses can be only used in manual focusing mode.

Q: Is it possible to use the OS function with a tripod?

A: The vibration caused by the firing of the shutter and the movement of the mirror is transferred to the tripod. The characteristics of these movements are different to those experienced during hand held photography and the OS system cannot compensate for them. If you wish to use a tripod, please switch off the OS function.

Q: You use the term 'Minimum Focusing Distance' on all your lens specifications. What does this mean?

A: This is the distance from the film plane/image sensor to the subject. Many people assume it is the distance from the front of the lens however it is measured from the film plane. The shorter the Minimum Focusing Distance, the closer you can focus on the subject.

Q: How do I use the Macro Switch on my 70-300mm f/4-5.6 lens?

A: First, set the zoom control to its maximum telephoto position. Then, slide the Macro Switch to the “Macro” position. Now the focus ring can turn from infinity to macro range. (The macro switch cannot be changed to the “Macro” position if the zoom ring is set to other than the maximum telephoto setting.) While the Macro Switch is set to the “Macro” position, the zoom ring is locked in the maximum telephoto setting and zooming is not possible. To avoid damage to the lens, please do not force the zoom ring to turn. To return the normal mode, please then turn the focusing ring out of the macro range. Then slide the Macro Switch to the “Normal” position. If the focus ring is in the macro range, the switch will not move.

Q: What is the difference between 50/2.8 EX macro and 105/2.8EX Macro with Life Size Magnification?

A: The image of the subject, which is taken by both lenses, will have same magnification, however the size of backgrounds will be different. The picture, which is taken by 50mm/f2.8 EX Macro Lens, will have wider background if compared with the 105/f2.8 Macro Lens. Further, lens to subject distance will be different for making life size pictures with both lenses. The subject to lens distance for 50mm/f2.8 is 40.5mm/1.7in., however this distance is 120mm/4.7in., for 105/2.8EX lens.

Q: Is it possible to attach other manufacturers 'drop-in' filters into the filter holder of my 500mm f/4.5 lens?

A: The filter used in the 300mm f/2.8, 500mm f/4.5 and 800mm f/5.6 lenses have a 46mm filter size and there is no problem if you attach the filters of the other brands. However, if the thickness of the filter is over 5mm then you cannot attach this filter to its holder. In the case of polarising filters, you can only use the Sigma filters.

Q: Can I use different types of lens hoods on my Sigma lens?

A: No. All our lens hoods are matched exactly to the lens they are supplied with.

Q: Does your Sigma lens have an International warranty? I am looking to buy one of your lenses and I'm working overseas for a couple of months. I wanted to check whether Sigma UK will still cover lenses brought from outside the UK?

A: Sigma lenses do come with a 1 year international warranty, however, the warranty is only honoured if VAT and duty have been paid on importation into the UK, otherwise it is an illegal import. Once these taxes have been taken into account, our customers usually find it better value to buy an official UK imported lens. Sigma UK also offer an extended 2 year warranty on all EX lenses which have been imported through us. For further details click here.

Q: I have just purchased a Nikon D40x camera and the auto focus of my Sigma lens will not work with it. Is the lens faulty?

A: Unlike most cameras, the Nikon D40x does not have an auto focus motor built into the camera. Therefore, auto focus will only work with our HSM lenses as these have a motor built into the lens.

Q: I have an Olympus E system camera with 4/3 technology. Which lenses in your range are suitable for this camera?

A: We produce a range of lenses in the Four Thirds fit. For details of these, click here.

Q: How fast is the continuous shooting? How many images is can be capture in continuous shooting?

A: The SD14 features a continuous shooting speed of 3 frames per second. The number of images that can be captured in continuous shooting mode is dependent upon the resolution setting; High – 6 frames, Medium – 12 frames and Low – 24 frames.

Q: What is the synchro mode on the SD cameras?

A: The Synchro mode enables to shoot fixed shutter speed 1/180 sec. Setting with Auto bracketing function allows selection desired aperture value and easily flash exposure bracketing.

Q: What is the dust protector?

A: The dust protector is optical glass shield unit which is equipped SD series Digital SLR camera. It prevents dust or dirt from entering the camera. In addition, the dust protection can be detached easily for cleaning image sensor.

Q: Which languages are available in SD cameras?

A: SD14 camera is available in 8 languages from English, Japanese, German, Chinese, French, Spanish, Italian and Korean.

Q: What is the shutter life cycle of the SD14?

A: The durable focal plane shutter mechanism has life cycle of over 100,000 shots. The shutter is ideally suited to the requirements of digital cameras. This new shutter dramatically reduces the amount of dust and dirt from the shutter mechanism.

Q: What is the Quick Set Button?

A: The Quick Set button enables users to display important settings, ISO, pixels, JPEG quality and file type, white balance, on the LCD monitor, using one button.

Q: What is the mirror lock-up mechanism?

A: The mirror lock-up mechanism raises the mirror thus preventing vibration when the shutter is released. This prevents camera shake, and is especially effective for macro photography or landscape using extremely long telephoto lenses. Use of remote controller (sold separately) or cable release (sold separately) also reduces the possibility of camera shake.

Q: Which kind of mount type is available with the SD cameras?

A: SIGMA SD cameras are available with SA bayonet mount (non-external mount type).

Q: Is it possible to output images to TV?

A: SIGMA SD cameras video output system can be switched between PAL system (used in Europe, etc.,) and NTSC system (in Japan and the U.S., etc.). This means that video output of pictures is possible in many parts of the world.

Q: Is it possible to use IEEE1394 on the SD14?

A: The SD14 is not equipped IEEE1394 terminal.

Q: What kinds of Storage Media can I use in SD cameras?

A: In the SD14, you can use CompactFlash (TypeI/II) and Microdrive (FAT32 Compatible). The SD9 and SD10 is only compatible with FAT16 cards (less than 2GB in size)

Q: Is it possible to update firmware on the SD14?

A: It is possible to download the Firmware “Ver1.01” from the following site. http://www.sigma-sd14.com/software/firmware/index.html Please read “HOW TO UPDATE” before operation. Please notice it is not necessary to update this firmware to the firmware version “Ver.1.01” or later.

Q: Is USB2.0 available in SD14?

A: USB2.0 is available in SD14. It is possible to transfer multipurpose images by using USB (2.0) interface. The SD9 and SD10 are supplied with USB 1.1.

Q: Is it possible to use 4GB storage media?

A: The SIGMA SD14 is compatible with FAT32 system, allowing usage of CF cards larger than 4GB CF cards to be used. With the SD9 and SD10, cards no larger than 2GB can be used.

Q: How many images can I fit on a 1GB card on my SD14?

A: The number of images can be recorded in 1GB storage media depending on the resolution mode – approximately 75 images, Medium – approximately 153 images, Low – approximately 307 images. This number is varied depending on subject.

Q: What is the focal length multiplier with the SD cameras?

A: When using a camera with an APS-C size image sensor, you will have to multiply the focal length. With the SD cameras, you will need to multiply the focal length of lenses by 1.7x. Therefore an 18-200mm lens, for example, effectively becomes 30-340mm

Q: How many pictures can I take on one charge of the battery on my SD14?

A: There are many factors to battery life, such as how often the LCD screen is used, if you use auto-focus or manual focus. However, one charge of the battery should give about 300 images.

Q: What lenses can I use with the SD cameras?

A: The entire range of Sigma lenses are compatible with the SD cameras, including DC and DG lenses. Just ensure you purchase the Sigma SA fit as the other fittings are not compatible.

Q: What does formatting a CF card do?

A: Formatting a CF card erases all of the data on a CF card, including files, images and directory structures. Formatting a CF card may also repair a non-functioning card with corrupted data. Physical damage, faults or bad sectors cannot be fixed by formatting.

Q: What is custom white balance and how does it work?

A: If you are photographing under very unusual light conditions such as mixed light sources, or very specific studio lighting, such as strobes, for best results, it is recommended that you use the Custom white balance setting. This feature allows you to capture a sample of a known neutral colour object (such as a grey card or a white wall) and use that information to adjust the white balance of the following photographs.

Q: What kind of image processing is performed on the camera?

A: The camera performs a limited amount of processing, in order to display and store a small preview of each image. When the user magnifies an image to examine it in more detail, the camera further processes the target area to give a higher resolution view. With a goal of saving time and power, these previews and magnified views do not use the full high quality processing that is available in Sigma Photo Pro.

Q: Why doesn't the number of images remaining shown in the frame counter match the actual number of images I'm able to take?

A: The number of remaining images shown in the frame counter is only an estimate based on a fixed file size. However, all images are compressed in the camera. The RAW files use a lossless compression algorithm (meaning that the compression does not, in any way, degrade image quality). Therefore, the actual size (in megabytes) of each image will vary depending on the subject, shooting conditions and shooting mode, which can all affect how well an image compresses.

Q: Is it still possible to get dust on the sensor even with the dust protector?

A: Occasionally small particles from the shutter mechanism will flake off and adhere to the image sensor. If these particles are big enough to be visible in your images, it will be necessary to have the image sensor cleaned.

Q: Will my pictures be sharper if I shoot without the dust protector?

A: The dust protector does not degrade the image quality in any way, nor does reduce the cameras sensitivity. The camera will not function properly if the dust protector is removed.

Q: What do I do if the sensor gets dust on it? Can I clean the image sensor myself?

A: Although it is possible to remove the dust protector and clean the image sensor yourself (see the camera manual for instructions), we do not advise that you attempt this procedure yourself. Due to the extremely delicate nature of the image sensor, we strongly recommend that you contact an authorized Sigma Service Station to have the sensor cleaned.

Q: How fast is the continuous shooting? How many images is can be capture in continuous shooting?

A: The SD14 features a continuous shooting speed of 3 frames per second. The number of images that can be captured in continuous shooting mode is dependent upon the resolution setting; High – 6 frames, Medium – 12 frames and Low – 24 frames.

Q: What is custom white balance and how does it work?

A: If you are photographing under very unusual light conditions such as mixed light sources, or very specific studio lighting, such as strobes, for best results, it is recommended that you use the Custom white balance setting. This feature allows you to capture a sample of a known neutral colour object (such as a grey card or a white wall) and use that information to adjust the white balance of the following photographs.

Q: What kind of image processing is performed on the camera?

A: The camera performs a limited amount of processing, in order to display and store a small preview of each image. When the user magnifies an image to examine it in more detail, the camera further processes the target area to give a higher resolution view. With a goal of saving time and power, these previews and magnified views do not use the full high quality processing that is available in Sigma Photo Pro.

Q: How fast is the continuous shooting? How many images is can be capture in continuous shooting?

A: The SD14 features a continuous shooting speed of 3 frames per second. The number of images that can be captured in continuous shooting mode is dependent upon the resolution setting; High – 6 frames, Medium – 12 frames and Low – 24 frames.

Q: What is custom white balance and how does it work?

A: If you are photographing under very unusual light conditions such as mixed light sources, or very specific studio lighting, such as strobes, for best results, it is recommended that you use the Custom white balance setting. This feature allows you to capture a sample of a known neutral colour object (such as a grey card or a white wall) and use that information to adjust the white balance of the following photographs.

Q: What if I shot my pictures with the wrong white balance setting?

A: As long as the image is taken in RAW, the white balance setting does not in any way effect how the image is actually captured, but rather just appends certain information to the image file telling the computer how to process the image. If the image was captured with the wrong white balance setting, it is easy to change this once the image is on the computer using SIGMA Photo Pro.

Q: Does the external flash automatically adjust its zoom position for the 1.7x focal length multiplier?

A: No, Sigma flashes are designed to provide an angle of coverage that accommodates the picture area of a standard 35mm film camera. The area covered by the flash will, therefore, be larger than the recorded image due to the 1.7X focal length multiplier of the camera.

Q: What is a histogram and how do you use it?

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Q: What happens if I put in a CF card with X3F images already on it?

A: Regardless of the File Numbering setting, the next image captured will be assigned the larger of 1) the next available number from the camera image counter or 2) one number greater than the highest numbered image already on the card. This system prevents images from showing up on the card chronologically out of sequence.

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A: The Fill Light affects tone correction by adding extra light energy into the shadow regions without overexposing highlight regions. Decreasing this setting can be used to increase shadows in darkness.

Q: Can I use your flashgun with my camera?

A: Sigma flashguns are designed to work on many different makes and models of cameras. For compatibility information on flashguns, click here.

Q: What will be the illumination angle if I use it with my Digital SLR camera?

A: Illumination angle of Sigma flashguns is adjusted to 35mm film format. Therefore when using these flashguns with APS-C size digital SLR cameras, the illumination angle will be wider.

Q: How will my flashgun (NA-iTTL) function with my Nikon digital SLR camera?

A: Nikon D200, D2X, D2H, D2Hs, D70, D70s, and D50 will function in “i-TTL” mode. D100, D1X, D1H and D1 will work in D-TTL mode.

Q: I have just changed my camera system from Canon to Nikon. Is it possible to change the base of my Canon fit flashgun to work on my new Nikon camera?

A: As with lenses, it is not possible to change flashguns to work on different manufacturers cameras.

Q: I have a Sigma lens on my Nikon body and 'FEE' is displayed on the cameras' LCD?

A: Simply turn the lens’ aperture ring to the minimum aperture (eg. f/22) where it will lock into position. This is usually indicated by an orange dot.

Q: I have just purchased a new Sigma optically stabalised lens and notice that the lens makes a slight noise when I half press the shutter button. Is that normal?

A: OS lenses do make a soft noise upon start up. This noise emits whilst the OS system is setting into position. Once the OS is set, generally after one or two seconds, the noise will stop. This is completely normal for OS lenses.

Q: I have just purchased your 18-125mm OS lens which I am very happy with however there is a buzzing noise which occurs even when the OS is switched off. This also remains for about 1 minute after the camera is switched off. Is the lens faulty?

A: It is normal for this lens to make a slight buzzing noise. Please refer to the lens’ instruction leaflet for further details.

Q: I have just purchased a Sigma lens for my Nikon camera, however the aperture will not close. Is the lens faulty?

A: No, simply set the aperture ring to F22, marked in red, and lock the aperture ring. Then use the camera to change the aperture instead of the lens.

Q: My EX tele-converter won't fit on my Sigma lens?

A: EX converters are matched tele-converters designed to give optimum quality. This does limit the lenses they can be used with. Please refer to the table here for a list of compatible lenses.

Q: When attaching my old Sigma lens to my new Canon digital camera, an Error99 message appears?

A: This could either be due to the lens’ iris or the lens’ circuit which may need upgrading. Please contact us for further details. To speed up you enquiry, please have to hand the exact model number and serial number of your lens.

Q: I have an old Sigma 70-300mm lens which I gather needs 're-chipping' to work on my new Canon digital SLR. Can this be done?

A: The majority of lenses we can rechip. However there are a few older lenses which we are unable to re-chip due to parts no longer being available. In order to answer your question, we need to determine which 70-300mm lens you have. If you look at the lens, is the Macro switch held on by two screws? Or does it state ‘Super’ on the unit?

Q: My lens makes a loud, grinding noise when I manual focus?

A: Ensure that the camera / lens is in MF mode when manual focusing otherwise this could cause damage to the gearing system.

Q: The zoom action of my lens keeps slipping when I point the lens down?

A: Many lenses have large and heavy front optics which cause zoom creep. We suggest pointing your lens up or down 45 degrees to the horizontal. If your lens doesn’t creep, we are unable to tighten it. If however it still does, please send the lens into us.

Q: I have several specs of dust in my lens. Will this affect my pictures?

A: No. This will make no difference to image quality as the dust is too far away from the sensor. If you do have dust specs on your pictures, this will be due to dust particles on you image sensor.