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Archive 2014 · Sigma 35mm over-exposing.

  
 
ariel777
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p.1 #1 · p.1 #1 · Sigma 35mm over-exposing.


I've had my Siggy 35mm for a year and one-half without any problems...until now. On both the D800 and D7100, from 5.6 and stopped down further, the captures are completely over-exposed (using A mode) until EC is adjusted to -5, with the highlights then recaptured, with a then-perfectly usable image (with the histogram fine). Has anyone else had this issue suddenly occurring? Thank you.


Jun 28, 2014 at 12:08 PM
snapsy
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p.1 #2 · p.1 #2 · Sigma 35mm over-exposing.


Sounds like the aperture lever on the lens is out of calibration.


Jun 28, 2014 at 12:22 PM
AtomicPunk
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p.1 #3 · p.1 #3 · Sigma 35mm over-exposing.


I haven't had the Sigma 35 for that long but I haven't had any exposure issues with it. Did anything change? Did you update firmware on your cameras? Was there any impact to the lens? Do you own the Usb dock? If so, are you running the latest firmware on the lens?


Jun 28, 2014 at 12:35 PM
runamuck
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p.1 #4 · p.1 #4 · Sigma 35mm over-exposing.


The problem is in the aperture. Either the blades aren't closing down, or the aperture lever in the camera is inoperative.


Jun 28, 2014 at 03:29 PM
ariel777
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p.1 #5 · p.1 #5 · Sigma 35mm over-exposing.


Thank you, gentlemen. I'll call and then ship if off to Sigma.


Jun 28, 2014 at 03:39 PM
ariel777
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p.1 #6 · p.1 #6 · Sigma 35mm over-exposing.


The problem was the diaphragm per Sigma. The turnaround time (shipped from LA to NY and back) was 8-9 days.....commendable to say the least. Nikon should take some lessons from Nikon.


Aug 31, 2014 at 06:31 PM
mmurph
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p.1 #7 · p.1 #7 · Sigma 35mm over-exposing.


Did they say anything about it? Sticky diaphragm?

Did they take it apart & clean it? No charge?

Good to know about the service. Thanks!

M.



Aug 31, 2014 at 10:37 PM





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