Question about Sigma 17-35mm f/2.8-4.0 EX Aspherical HSM for Canon EOS

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Fstop not clearing back to 2.8

My Sigma EX 17-35mm F2-8 lens on my Canon EOS 5D sticks when stopping down and is very difficult to make it return to F2.8. Any ideas please, I don't think it is worth spending £100 on repair

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The intrupter needs replacing I can do it for £50 +p+p

Posted on Oct 25, 2009

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Where can i buy a Sigma 70-300mm f/4-5.6 DL Macro AF Lens mount adapter for a canonEOS 500D


You can't, not as far as I know.

Getting functionally useful adaptors from any other brand to Canon EOS is difficult as the register distance from the sensor to the lens is the deepest of all current lens mounts. Adaptors therefore require expensive optical correction in order to preserve infinity focus ability and given that the adapted lens will still be substantially crippled most owners aren't prepared to pay for such an adaptor. In any case, the additional optical elements will reduce optical quality.

Due to similar electronics, it is possible to physically convert a Sigma mount lens to EOS by fitting an EOS lens bayonet but it's a skilled job requiring fabrication skills and even then there's no guarantee that the lens will communicate correctly with all EOS bodies. In practice, due to the scarcity of Sigma mount lenses the conversion is usually the other way around.

Sep 15, 2010 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...

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I just purchased a Sigma 2.8 f=28mm for canon but I don't know if it will fit my Canon EOS 500 N (same as Rebel G) 35mm SLR film camera. Can you help with this question.


Canon EOS 500N has an EF lens mount, so all lenses with Canon EF mount will fit. All lenses with MF and EF-S won't fit. If you purchased Sigma 28-70mm f/2.8 EX, then it have EF mount and will fit EOS 500N.

Jun 06, 2010 | Sigma Zoom Wide Angle-Telephoto 28-70mm...

1 Answer

Using old Sigma AF lenses with new DSLR Canon EOS


Hi Is the 28-70 a DF type if so it will work on a canon DSLR but if its the older one with the scale ring is on the outside of the lens it will need a rechip but I think thay are no longer avabile the 70-300 if is a super it will work or need a rechip if its a older one with a macro switch held on the lens with 2 screws it to old to up grade

Dec 25, 2009 | Sigma 28-70mm f/2.8 EX DG for Canon EOS

1 Answer

Sigma lens repair


Hi If you are in uk I can repair it for you for £30.00

Nov 02, 2009 | Sigma 17-35mm f/2.8-4.0 EX Aspherical HSM...

1 Answer

Sigma 120-300mm f/2.8 EX HSM APO adapted to digital Canon


Hi The 120-300 f2.8 is a full frame lens so it works on all canons with a eos fitting

Jul 14, 2009 | Sigma Zoom Telephoto 120-300mm f/2.8 EX...

1 Answer

Matching 2 brands


Simga makes lenses to fit several different makes of camera bodies including Canon and Nikon. I'm assuming your Sigma lens has a Nikon mount, if so there are some adapters, but they may not work like you want - not all functions may work properly thru the adapter. For best results you should return or sell the lens and get one with the Canon mount.

Dec 26, 2008 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

Hi all, I wonder if you can supply some advice regarding a Sigma17-35mm lens I purchased earlier in the year. Basically if I use the automatic or 'P' setting on my Canon EOS 30D camera the image is over...


Try your EOS in AV (aprature value) mode. You should be able to adjust your aperature value in 1/3 or 1/2 steps dependind how you have your Custom Functions set in your camera's menu. Possibly the lens you purchased is for an EOS 35mm. If you use a 35mm lens on your eos there are some calculations you must use. When using a 35mm lens on the EOS 20D, 30D, 40D and 50D bodies, you must first calculate your focal leingth by 1.6 times. With this, your exposure changes as well.

The only EOS Digital SLR bodies that use a 35mm x 24mm CMOS sensor are the 1D and 5D. My wife uses a Tamron 18-200mm f3.5-5.6 lens on her 20D and loves it.

If this makes no difference, you may have a defective lens.

Nov 29, 2008 | Sigma Cameras

1 Answer

X 2 converter


  1. with this combination of camera/lens you will not have AF when a x2 converter is applied! that is because in all canon cameras (except 1D series) there is no AF when the Aperture is smaller then F5.6.
  2. if you don't mind using MF, u need the sigma 2x EX DG Tele Converter.

Sep 30, 2008 | Sigma Cameras

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