BF/FF test methodology

Specifically for the discussion of the A-mount DSLR range
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calpon
Initiate
Posts: 46
Joined: Thu Aug 23, 2007 2:35 pm

BF/FF test methodology

Unread post by calpon »

For readers here that do not normally visit Dyxum. I have posted on that site with a test of a problem I think I might have. I initially thought I had a BF/FF problem with my A700 especially with my Sony 50 1.4. Today I received a second A700 (Excellent condition floor model for $405). I thought a simple test of both camera and 1 lens tripod mounted shooting a tape measure on a table would be the final verdict. Well....now I have more questions than before.

Please visit the link below and comment either here or on Dyxum. Thanks!
http://www.dyxum.com/dforum/forum_posts ... 574#418574
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Javelin
Emperor of a Minor Galaxy
Posts: 1856
Joined: Wed Jul 16, 2008 4:51 pm

Re: BF/FF test methodology

Unread post by Javelin »

Maybe try your test again but with diferent lighting. it looks like the colour cast you get from tungsten and might be causing a slight BF. the charts i've seen used for this have contrast lines that extend to the edge of the the frame too. I don't know if thats good or bad.
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