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12-05-2010, 06:43 AM   #1
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sigma 24-70 focus problems?

Hi,

I had some doubts on the focusing of my new lense: the sigma 24-70mm so i took a test. And messed with the AF adaptation in the k-5 to try and get it right...

The pictures below are all taken on 70mm, f2.8 (ISO 100 - 1/30s) on tripod. THese are all cropped around the word which i focused on (- RNMENTAL). I see strong front focus, which isn't solved with AF adaptation.
1: normal
2: AF adaptation +10
3: AF adaptation - 10



Do i have a bad copy? or is this a bad focus test

Kind regards,
Graisin

12-05-2010, 06:47 AM   #2
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Original Poster
After this test i was extremely worried...
So i took another one:

1: sigma lense (24mm, f4.0) no focus adaptation focus on governmental
2: Pentax kit lense (24mm, f4.0) no focus adaptation focus on governmental

12-05-2010, 10:10 AM   #3
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Location: Shanghai
Posts: 4,490
Hmm - what I see is .... nothing ! You forgot to attach the photos !
12-07-2010, 03:28 AM   #4
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Original Poster
weird...
When i open the thread on my pc i see the pics...

Will try it again later on.

thx!

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