Stuck on whether to return sigma 35mm for 35mm 1.4L or 35f2 is

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KKCFamilyman

KKCFamilyman

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Mar 16, 2012
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#1
I just got the sigma 35mm 1.4. I thought that the lens would be a dream come true. The truth is the af seems to front focus. It has a hard time focusing in aiservo mode. Also further subjects are not that sharp. The 1.4 aperature is nice and the colors are good but am unsure if I should go with one of the canon offerings. I use it for indoor candids of the kids and a walkabout lens since a 50mm is a little tight and the 40mm only does 2.8. Should I go thru the trouble of sending it in to sigma for a look or is the Canon better in the L or IS version. I have used mostly f2.8 and higher to 5.6. This is only being used on a canon 5d mark iii. I only have 9 days to get it returned. Is this the norm for a 35mm or should I stick with OEM even though it costs more and is much older?
 
#6
neuroanatomist said:
TDP mentions servo issues with the new Tamron 24-70, seems to be a common issue with 3rd party lenses. My 35L does very well in servo mode, old though the design is...
Click to expand...

Agreed, I have seen some issues on the Tamron 24-70 in AI-Servo on my 5d3. At least under very low lighting. It works, it just doesn't really always work well. Especially if it has to go from near to far or far to near focus at the start, although I suspect that's just a difficult use case on that along with low lighting for any camera/lens to handle.
 
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#9
The advantage of staying with OEM is that you can send both body and lens to Canon and they will sort out the issue and fix one or both. The disadvantage is the price.

As far as subjects far back being out of focus, that will happen the same, Canon or Sigma or Tamron, ... Depth of field is going to be shallow at wide apertures.
 
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#11
I tried posting a test I took tonight between my 24-70ii and the sigma and my 24-70 was spot on and the sigma was soft which means its front focusing I think either way they should have been close. I also tried to upload pics but it is just freezing when I try to attach.
 
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#12
Mt Spokane Photography said:
The advantage of staying with OEM is that you can send both body and lens to Canon and they will sort out the issue and fix one or both. The disadvantage is the price.

As far as subjects far back being out of focus, that will happen the same, Canon or Sigma or Tamron, ... Depth of field is going to be shallow at wide apertures.
Click to expand...

So then is the canon 35l the better buy or should I pursue getting this lens adjusted? The quality is worth it not the money. I doubt I will shoot at 1.4 much more like 1.8 2.0 or higher just to have a walk about lens which is also why I was wondering about the 35 f2 is but the reviews do not seem so glowing.
 
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#13
also out of interest what servo mode and focus point selection are you using? this could also have something to do with it I typically use single point AF with the 8 assist points surrounding enabled also back button focus and the DoF preview customised to engage servo i find switching rapidly between single shot and servo this lens stile preforms superbly
 
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#14
wickidwombat said:
also out of interest what servo mode and focus point selection are you using? this could also have something to do with it I typically use single point AF with the 8 assist points surrounding enabled also back button focus and the DoF preview customised to engage servo i find switching rapidly between single shot and servo this lens stile preforms superbly
Click to expand...

Single no assist, back button aswell. Even tonight in one shot on a stationary box it front focused at f2.8 . Just frustrated since i never had a lens this far off.
 
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#16
I never had an issue with the lens and it's focus on 5DII, if anything when focusing very close it seems to not be spot on sometimes, but I blame that on super narrow DOF + focus and recomposing, and this is the only lens I didn't have a need to AFMA. This shot below may not be perfect (F/1.4 anyways) but I put the camera up to my face, and took my first shot, and a winning photo popped out!
I also have done a lot of street candids shooting from hip, I've gotten quite a lot of tack sharp faces of passer-byers, and not to mention how sharp the lens is overall.
 

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#17
Nishi Drew said:
I never had an issue with the lens and it's focus on 5DII, if anything when focusing very close it seems to not be spot on sometimes, but I blame that on super narrow DOF + focus and recomposing, and this is the only lens I didn't have a need to AFMA. This shot below may not be perfect (F/1.4 anyways) but I put the camera up to my face, and took my first shot, and a winning photo popped out!
I also have done a lot of street candids shooting from hip, I've gotten quite a lot of tack sharp faces of passer-byers, and not to mention how sharp the lens is overall.
Click to expand...


That's a great shot :)
 
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