Fine focus adjust with DFA 28-105?

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Uloo
Uloo Senior Member • Posts: 2,912
Fine focus adjust with DFA 28-105?

I have a Pentax K-1m2 and the DFA 28-105. I noticed recently that my pictures are looking soft. So I did a test and found out that at different focal length the fine adjust is different.

-at 28mm its +4

_at 50mm its -4

-at 105 mm its -5

Is this pretty normal for this lens or is this just happening over times.

How do you people deal with that?

Thank you for any input.

Ulrich

 Uloo's gear list:Uloo's gear list
Pentax K-3 Pentax K-1 II Pentax smc DA 16-45mm F4 ED AL Sigma 105mm F2.8 EX DG Macro Sigma 10-20mm F3.5 EX DC HSM +4 more
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