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08-30-2016, 02:52 AM   #16
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QuoteOriginally posted by Class A Quote
Clearly, given your own experience ("It has been spot on with no FFAs and gets a lot of use now."), it is typically the camera-lens combination that is problematic.
The K-1 came out after production of these lenses for Pentax ceased. I purchased this lens when the K5-IIs was still the flagship. Since the lens never worked properly with it or the K3 I deem that an issue with the lens. It might happen to work with my K-1, but it didn't work with the bodies it was originally designed to work for.

09-07-2016, 06:13 PM   #17
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put it on a tripod, try +10 adjustment and -10 adjustment.
I think the difference is huge.
09-09-2016, 08:52 PM   #18
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I'm probably asking a dumb question here, but how does this adjustment affect manual focus lenses? Does it just change the behavior of the in-focus octagon? I'm asking since I'm having front focus issues with my manual lenses... but LV with peaking is spot-on.
09-09-2016, 11:39 PM   #19
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QuoteOriginally posted by jcdoss Quote
I'm probably asking a dumb question here, but how does this adjustment affect manual focus lenses? Does it just change the behavior of the in-focus octagon? I'm asking since I'm having front focus issues with my manual lenses... but LV with peaking is spot-on.

Electronic fine tuning affects autofocus only. Fine tuning for manual focusing involves adjustment of the focusing screen.

09-09-2016, 11:50 PM - 1 Like   #20
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QuoteOriginally posted by Bengan Quote
Electronic fine tuning affects autofocus only. Fine tuning for manual focusing involves adjustment of the focusing screen.
He was asking about the influence of the AF fine adjustments on the hexagonal indicator in the viewfinder.

This has nothing to do with the focusing screen.

@jcdoss: As long as you are using the "Apply All" option, the AF fine adjustment will affect when the green hexagon in the viewfinder lights up, even for manual focus lenses.
09-09-2016, 11:54 PM - 1 Like   #21
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QuoteOriginally posted by Class A Quote
He was asking about the influence of the AF fine adjustments on the hexagonal indicator in the viewfinder. This has nothing to do with the focusing screen. @jcdoss: As long as you are using the "Apply All" option, the AF fine adjustment will affect when the green hexagon in the viewfinder lights up, even for manual focus lenses.

My bad. I should have read it twice before before putting the finger on the trigger. You are of course correct.
04-15-2017, 12:33 PM   #22
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Revisiting an old thread which raised some questions for me, does the K-1 have any provision for moving the sensor along the axis that goes through the lens? In other words, if a manual lens can't focus sharply at infinity can the K-1 compensate using back focus adjustment or is that just for the AF system and a lens repair job is in order for such a lens?
04-15-2017, 02:16 PM   #23
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Sensor doesn't move fore/aft- the focus adjustment is purely a function of the phase detection module. Lack of infinity focus on manual lens is a problem of the lens focus ring stop. I've never had a lens that can't reach infinity - but many focus past infinity. HTH

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