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05-09-2016, 11:36 PM   #1
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What AF Fine Adjustments have you needed on K-1?

Having been used to the need for AF calibration for most lenses on K-5 and K-3, I had no reason not to expect the same with the K-1.

So far I've been generally happy with K-1 focus accuracy, out of the box, with most of my 'old' lenses (mostly FA & DA primes) so haven't felt the need to perform a thorough calibration.

But today my new 24-70/2.8 arrived and clearly needed adjustment. A +4 adjustment did the trick.

Just wondering which lenses you have needed to make AF adjustments for on the K-1?

05-10-2016, 12:36 AM   #2
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I did this about the second day I had the K-1 (about 2hrs work for 8 or so lenses)...... all lenses needed some adjustment.... primes are pretty straight forward, but needed to consider my 150-450 and 70-200 uses to optimise the adjustment across the zoom range...... most in the -4 to +4 range...
05-10-2016, 12:41 AM   #3
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QuoteOriginally posted by Kennod Quote
Having been used to the need for AF calibration for most lenses on K-5 and K-3, I had no reason not to expect the same with the K-1.

So far I've been generally happy with K-1 focus accuracy, out of the box, with most of my 'old' lenses (mostly FA & DA primes) so haven't felt the need to perform a thorough calibration.

But today my new 24-70/2.8 arrived and clearly needed adjustment. A +4 adjustment did the trick.

Just wondering which lenses you have needed to make AF adjustments for on the K-1?
I started this thread on the 24-70... All other lenses are spot on.

https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/317429-just...0-f-2-8-a.html
05-10-2016, 01:14 AM   #4
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QuoteOriginally posted by Kennod Quote
Having been used to the need for AF calibration for most lenses on K-5 and K-3, I had no reason not to expect the same with the K-1.

So far I've been generally happy with K-1 focus accuracy, out of the box, with most of my 'old' lenses (mostly FA & DA primes) so haven't felt the need to perform a thorough calibration.

But today my new 24-70/2.8 arrived and clearly needed adjustment. A +4 adjustment did the trick.

Just wondering which lenses you have needed to make AF adjustments for on the K-1?
For now, i have back-focus issues with :
- FA*300/2.8
- FA*85/1.4
- Tokina ATX pro 80-200/2.8
Not yet corrected, because other priorities.

05-10-2016, 03:01 AM   #5
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Seems pointless. Your 24-70 may need no adjustment on my K-1.

05-10-2016, 04:01 AM   #6
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My FA Limiteds are spot on. No adjustments needed.
05-10-2016, 07:01 AM   #7
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QuoteOriginally posted by clackers Quote
Seems pointless. Your 24-70 may need no adjustment on my K-1.
I'm just curious whether the need for AF adjustment is as prevalent on the K-1 as on previous Pentax bodies. Perhaps it is pointless but I felt like asking. I wonder what is the point of responding to a question you find pointless
05-10-2016, 08:16 AM   #8
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I now tested the D FA24-70 f2.8 on the K-1 (Used it on the K-3 before) and there is no need for adjustment. For more info read the thread I linked to in my previous post.

05-10-2016, 08:29 AM   #9
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Limited trios dead on.
Dfa 70 200 is also dead on.
Dfa 15 30 on mine is at -2.
Dfa 24 70 is all over.
May be because last two lenses from tamron.
05-10-2016, 06:47 PM   #10
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QuoteOriginally posted by Kennod Quote
I'm just curious whether the need for AF adjustment is as prevalent on the K-1 as on previous Pentax bodies. Perhaps it is pointless but I felt like asking. I wonder what is the point of responding to a question you find pointless
Well, not for my benefit, Kennod.


You might not understand that it's a sample variation issue of particular lenses and particular bodies. It's not an issue of a model's design, it's individual manufacturing tolerances.


If you tell us that you did a +4 on your 24-70 that doesn't even imply we should do the same.

Can't think why you'd ask if you realised that.
05-10-2016, 06:57 PM   #11
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QuoteOriginally posted by felixkh Quote
My FA Limiteds are spot on. No adjustments needed.
Same. And the 43 and 31 are old. Only the 77 is new.
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