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RichyX · 11-10-2009, 11:11 AM

My FA35 has a pretty serious case of back focusing.
It needs +10 adjustment on my K20D.

Could this be an issue with a MF film body?

Jonson PL · 11-10-2009, 12:30 PM

I don't see how, since you adjust the focus yourself on a MF film cam

keyser · 11-10-2009, 12:37 PM

What he said...

I assume that you're talking about AF 35mm bodies though. In which case, I don't know the answer to that question.

RichyX · 11-10-2009, 01:21 PM

Originally posted by keyser

What he said...

I assume that you're talking about AF 35mm bodies though. In which case, I don't know the answer to that question.

My film body is a superA, MF.

When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens.

keyser · 11-10-2009, 02:40 PM

Originally posted by RichyX

My film body is a superA, MF.

When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens.

In that case it really is what he said. Trust your eyes, as what you see in your viewfinder will match what gets put down on film.

I've never had any problems focussing AF lenses on a MF camera.

Wheatfield · 11-10-2009, 10:50 PM

AF adjustment on AF cameras and manual focus are completely separate issues.
If other lenses manually focus properly, then any lens that is capable of achieving focus will work properly.

Jonson PL · 11-11-2009, 01:38 PM

Originally posted by RichyX

My film body is a superA, MF.

When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens.

Remember when using K20, to have the diopter set to neutral. Else it can happen that what the camera thinks is focus, might not look it in the VF.

One of my pet peeves with Pentax, is that the diopter selecter doesn't lock tightly in the neutral position, as some other brands do.

11-10-2009, 11:11 AM	#1
RichyX Forum Member Join Date: Aug 2007 Location: Dublin, Ireland Posts: 84	Back focusing AF lens an issue on MF film bodies? My FA35 has a pretty serious case of back focusing. It needs +10 adjustment on my K20D. Could this be an issue with a MF film body?

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11-10-2009, 12:30 PM	#2
Jonson PL Veteran Member Join Date: Dec 2006 Location: Copenhagen Photos: Gallery Posts: 1,842	I don't see how, since you adjust the focus yourself on a MF film cam

11-10-2009, 12:37 PM	#3
keyser Veteran Member Join Date: Aug 2009 Location: Tsawwassen, BC Posts: 376	What he said... I assume that you're talking about AF 35mm bodies though. In which case, I don't know the answer to that question.

11-10-2009, 01:21 PM	#4
RichyX Forum Member Join Date: Aug 2007 Location: Dublin, Ireland Posts: 84 Original Poster	Originally posted by keyser What he said... I assume that you're talking about AF 35mm bodies though. In which case, I don't know the answer to that question. My film body is a superA, MF. When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens.

11-10-2009, 02:40 PM	#5
keyser Veteran Member Join Date: Aug 2009 Location: Tsawwassen, BC Posts: 376	Originally posted by RichyX My film body is a superA, MF. When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens. In that case it really is what he said. Trust your eyes, as what you see in your viewfinder will match what gets put down on film. I've never had any problems focussing AF lenses on a MF camera.

11-10-2009, 10:50 PM	#6
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,991	AF adjustment on AF cameras and manual focus are completely separate issues. If other lenses manually focus properly, then any lens that is capable of achieving focus will work properly.

11-11-2009, 01:38 PM	#7
Jonson PL Veteran Member Join Date: Dec 2006 Location: Copenhagen Photos: Gallery Posts: 1,842	Originally posted by RichyX My film body is a superA, MF. When looking through the viewfinder of the K20D the lens looked to be focusing ok. I assumed it would be ok on an MF film body but had me doubts as I've yet to develop any film shot with the lens. Remember when using K20, to have the diopter set to neutral. Else it can happen that what the camera thinks is focus, might not look it in the VF. One of my pet peeves with Pentax, is that the diopter selecter doesn't lock tightly in the neutral position, as some other brands do.

Back focusing AF lens an issue on MF film bodies?

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