An ugly discovery...

Started Jan 3, 2013 | Discussions thread
DAVID MANZE
Senior MemberPosts: 1,828Gear list
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Re: Just for the record
In reply to Kerusker, Jan 3, 2013

Hi,

Just for the record,

AF adjust, on my K5, +debug 20

Sigma 50-150 F2.8 -1 = +1

Sigma 10-20 4/5.6 0 = +2

Tamron 17-50 2.8 -1 = +1

CZJ 75-300 4.5/5.6 +10 = +12

Pentax 18-55 WR kit -3 = -1

Pentax FA50 I.4 -7 = -5

and a Tamron 75-300 4.5/5.6 that I tested for somebody recently needed +10.

I have had many other lenses and nearly all have needed some adjustment or other. I use + 20 in debug to bring the CZJ into the range -10 to +10.

These results are matched by my K20 within a digit or two!

When reading lists of AF adjustments from posts on this site,a multitude of different numbers seem more usual than a run of perfect zeros!

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