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10-25-2020, 10:04 PM   #1
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Changing lenses Pentax 645

I couldn't seem to find information on this subject, but can I change lenses mid roll without compromising an exposure on a Pentax 645?

10-25-2020, 11:44 PM - 1 Like   #2
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Yes, you are safe to change lenses mid-roll, just be careful not release the shutter during the process.
10-26-2020, 02:11 PM   #3
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QuoteOriginally posted by n333ms Quote
I couldn't seem to find information on this subject, but can I change lenses mid roll without compromising an exposure on a Pentax 645?
QuoteOriginally posted by pjv Quote
Yes, you are safe to change lenses mid-roll, just be careful not release the shutter during the process.
Out of curiosity, what camera can you not change lenses mid-roll without exposing the film? Double negative. Let me try this again: What camera will expose the film if changing the lens mid-roll?
10-26-2020, 03:55 PM   #4
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QuoteOriginally posted by Alex645 Quote
What camera will expose the film if changing the lens mid-roll?
Ummm... maybe the Linhoff Technorama III.

---------- Post added 10-26-20 at 03:56 PM ----------

I usually power-off my 645N and Z before changing lenses.

10-26-2020, 04:31 PM   #5
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QuoteOriginally posted by Alex645 Quote
Out of curiosity, what camera can you not change lenses mid-roll without exposing the film? Double negative. Let me try this again: What camera will expose the film if changing the lens mid-roll?
Had a fujica BL690 (Texas Leica) that had interchangeable lenses with built in leaf shutters. Fuji had to make a dark slide roll up curtain to shield the film from light. This would also apply to view cameras. Insert dark slide before changing lenses or else. Leaf shutter Hassy are probably similar.

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barondla
10-30-2020, 06:00 AM - 1 Like   #6
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QuoteOriginally posted by barondla Quote
Leaf shutter Hassy are probably similar.
Leaf Shutter Hasselblads like the 500series have an internal shutter in the body, and there is also a dark slide for the film back. So you can change lenses without issue.
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