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03-31-2015, 03:16 PM   #1
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Manual focus confirmation on 645D

Hi,

Could anyone clarify how the manual focus confirmation is supposed to be used on the 645D? I have tried manually focussing and then half pressing the shutter release, but the viewfinder spot and beep don't seem to confirm after the first press (even with the camera stationary), and sometimes I see the red spot flash but hear no sound (even when way off focus). I have also tried half-pressing the shutter and then focussing - the confirmation seems to happen even if the lens is focussed after the button is released.

(Curiously I first asked Pentax EU support about this question and general leaf-shutter compatibility, and they referred me to this website as they had no documentation of their own.)

Cheers,
Andy.

03-31-2015, 03:43 PM   #2
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QuoteOriginally posted by AndyL Quote
Hi,

Could anyone clarify how the manual focus confirmation is supposed to be used on the 645D? I have tried manually focussing and then half pressing the shutter release, but the viewfinder spot and beep don't seem to confirm after the first press (even with the camera stationary), and sometimes I see the red spot flash but hear no sound (even when way off focus). I have also tried half-pressing the shutter and then focussing - the confirmation seems to happen even if the lens is focussed after the button is released.

(Curiously I first asked Pentax EU support about this question and general leaf-shutter compatibility, and they referred me to this website as they had no documentation of their own.)

Cheers,
Andy.
I have the same question for my K-50! I just noticed the red square flashing today with my MF lens. It's pretty inconsistent though.

Last edited by Zephos; 04-01-2015 at 11:57 AM.
03-31-2015, 04:55 PM   #3
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QuoteOriginally posted by AndyL Quote
Hi,

Could anyone clarify how the manual focus confirmation is supposed to be used on the 645D? I have tried manually focussing and then half pressing the shutter release, but the viewfinder spot and beep don't seem to confirm after the first press (even with the camera stationary), and sometimes I see the red spot flash but hear no sound (even when way off focus). I have also tried half-pressing the shutter and then focussing - the confirmation seems to happen even if the lens is focussed after the button is released.

(Curiously I first asked Pentax EU support about this question and general leaf-shutter compatibility, and they referred me to this website as they had no documentation of their own.)

Cheers,
Andy.
While keeping the shutter button half-pressed, the camera should beep whenever the image gets in focus, with a small degree of tolerance.

Adam
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03-31-2015, 05:13 PM   #4
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QuoteOriginally posted by Adam Quote
While keeping the shutter button half-pressed, the camera should beep whenever the image gets in focus, with a small degree of tolerance.
Yes, as Adam says but with an additional caveat. When you have a more wonderful lens the smaller the degree of tolerance seems to be. If it's incredibly sharp ( e.g. sigma 35 1.4 Art) the moment of tolerance lasts less time whilst rotating the focus ring. The other issue is focus throw. If short you find you need to go incredibly slow and carefully in order to achieve stable green hexagon focal confirmation.

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