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Archive 2013 · Sigma 35mm 1.4 underexposing?
  
 
JCreations
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p.1 #1 · Sigma 35mm 1.4 underexposing?


I've been into the store today to check out the Sigma 35mm 1.4 and compared it with the Nikon version on my D800. While i was testing the lens, i noticed that the Sigma underexposed for about 1/3 - 1 stop compared to the Nikon. I asked for another Sigma and the same thing happened again. Also the images of the Sigma seemed to be a bit warmer then the Nikon.

I haven't read anything about this issue on reviews, but then again most of them are about the Canon mount. A quick search on Google showed that more people has this issue with a variety of Sigma lenses. Does anybody else notices this problem with the lens?





Jan 13, 2013 at 12:30 AM
Red G8R
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p.1 #2 · Sigma 35mm 1.4 underexposing?


You found a store with a few Sigma 35's to test


Jan 13, 2013 at 02:16 AM
Bruce Sawle
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p.1 #3 · Sigma 35mm 1.4 underexposing?


The sigma has substantial vignette at 1.4 this more than likely what you experienced.


Jan 13, 2013 at 02:30 AM
michaelwatkins
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p.1 #4 · Sigma 35mm 1.4 underexposing?


The Sigma 35/1.4 as tested does vignette a little stronger when wide open compared to the Nikon 35G. I wonder how the two compare at f/5.6?

For those using ACR or Lightroom, this lens correction profile for the Sigma may be of use:

http://www.fredmiranda.com/forum/topic/1181308



Jan 13, 2013 at 04:56 AM
 

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Nikfan
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p.1 #5 · Sigma 35mm 1.4 underexposing?


I experienced the same under exposure compared to my 24-70. I used my d800e for the comparison. Could it be more contrast on the Sigma? The blacks seemed darker and skin tones less washed out.
Also, I did not see sharper images compared to the 24-70.
Update: just checked histogram. Shows under exposure compared to 24-70. All shots were taken in-store, no flash.



Jan 13, 2013 at 02:01 PM
JCreations
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p.1 #6 · Sigma 35mm 1.4 underexposing?


Nobody else noticing this problem?



Jan 14, 2013 at 08:04 PM
rioni
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p.1 #7 · Sigma 35mm 1.4 underexposing?


Mine does not underexpose on a d600.



Jan 14, 2013 at 08:07 PM
snapsy
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p.1 #8 · Sigma 35mm 1.4 underexposing?


The calibration of the Sigma's aperture lever might be off. I tested two samples of the Tamron 24-70VC. The first was off by a full-stop, meaning f/4 had the identical DOF/transmission as f/2.8 (ie, the lens wasn't stopping down). The second copy was off by about 1/3 stop.


Jan 14, 2013 at 08:47 PM





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