Question about Sigma EF-500 DG for TTL Flash
Bought this new for my brother's EOS 400D, was mostly intermittently underexposing. I gave him my 420EX which works flawlessly, and I have now pinned down the problem on my 20D as follows.
1. Straight flash works ok, flash zooms ok.
2. When bouncing of roof, walls, ALWAYS underexposing (compared to my weaker 420EX), virtually useless results.
3. When using the built in -28mm diffuser, massive underexposure.
Dealer initially said he was willing to exchange it, now "to long time has passed".
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Posted on Jan 02, 2017
I've got the same problem with my new ef 500 dg super and my ef 530 dg super. It occurs on all nikon camera's I could get.
D70, D80 and Fuji S5 Pro. I don't have this problem with an old (4 years) sigma ef 500 dg super.
I will try to contact Sigma for this problem.
Posted on Jan 07, 2008
Yes, at the local Home Depot or Lowes they should have them. They're usually anywhere from 3 to 8 dollars unless they're specialty (stained glass or something like that) ones.
Posted on Jan 27, 2008
through other postings on your web site I was able to determine that the return air flow vents for the refrigerator (diffuser air) was blocked due to frost. I defrosted the unit and it is working fine now.
Posted on Jan 06, 2009
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