Sigma 150m macro OS underexposing on Canon 7D2

[Brachytron]

Hi, I've just started using my Sigma 150mm macro OS (2 years old) on my 7D2 and am getting underexposure of between 1 and 2 stops depending on how close I get to my subjects. My thoughts are that somehow, the camera isn't seeing the light loss as the lens is extended. Perhaps this is a firmware update issue with Sigma? Has anyone else seen this? Thanks.

 

[Canon Bob]

Have you got Peripheral Illumination correction enabled? The Sigma 150 shares the same tag as the original EF 100-400 and later bodies have been found to apply the correction erroneously.....more obvious on crop bodies as the bulk of the correction isn't within the frame.

Bob

 

[Brachytron]

Have you got Peripheral Illumination correction enabled? The Sigma 150 shares the same tag as the original EF 100-400 and later bodies have been found to apply the correction erroneously.....more obvious on crop bodies as the bulk of the correction isn't within the frame.

Bob

I have, thanks Bob I'll try that tonight and let you know.

 

[Canon Bob]

Don't forget that it can be instigated in-camera and in your PP software (depending which you use).

Bob

 

[Brachytron]

Nope, that didn't work. Works perfectly on my "old" 7D1. Guess I'll have to contact Sigma unless anyone else has any thoughts.

 

[Canon Bob]

Ah sorry....I was almost certain that it would be the cause. It's been found to be the case with the 105/150/180 macros when used on 1Dx and 5D3's but not on any older bodies.

Bob

 

[Icee]

My 105mm was like that on my 1Dx but worked fine on my 1Dmkiii so just used it on that till I changed to a Canon lens.

 

[Brachytron]

Ah sorry....I was almost certain that it would be the cause. It's been found to be the case with the 105/150/180 macros when used on 1Dx and 5D3's but not on any older bodies.

Bob

Thanks anyway Bob, I appreciate you taking the time to respond.

I've e-mailed Sigma so will post their response.

 

[Brachytron]

My 105mm was like that on my 1Dx but worked fine on my 1Dmkiii so just used it on that till I changed to a Canon lens.

When will Canon produce a 150-180mm macro with IS I wonder??

 

[Brachytron]

Just had word back from Sigma confirming that they recognise this as a problem and are working on a firmware update.