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02-01-2013, 06:50 AM   #1
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DA 70 mm overexposes a lot

Hello All,

My DA 70 mm is overexposing a lot. Each time I use it I have to underexpose by 3 points or something like that, to get not so overexposed images. Do you know what could be wrong?
The ISO values are not the issue.
Thanks!

Regards,

Fernando

02-01-2013, 07:03 AM   #2
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What camera are you using? Is the lens fully mounted - up to the click sound? Is the aperture being closed normally? Or does it stay wide open? Just go to M mode and set aperture to f14 or something and look down the lens when you take a photo.
02-01-2013, 09:47 AM   #3
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Does sound like a sluggish aperture mechanism. Slide the aperture lever on the lens to close the iris then release it, does it feel snappy or slow.
02-02-2013, 12:13 PM   #4
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Please post a sample photo including exif info. Otherwise, nobody can do anything but make wild guesses.

02-02-2013, 12:39 PM   #5
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And make sure you compare side-by-side with another lens to rule out aperture control problem on the body.
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