135 back for the 645?

ponggo · 01-01-2013, 11:08 AM

IS there such a thing as a 135 back for the 645? Sorry noob here
seeing a lot of other medium format bodies with 135 backs but I tried googling it... but couldn't find a link for a 645

thanks!

Anvh · 01-01-2013, 01:20 PM

645 doesnt have seperated backs as far as i know, only inserts

stevebrot · 01-01-2013, 02:01 PM

Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll.

Steve

ponggo · 01-01-2013, 07:36 PM

Originally posted by stevebrot

Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll.

Steve

ok. i think i got my terminology wrong. i thought you call those backs. haha (noob with film and medium format)
regarding the inserts. is there an insert for 135 film?

Venturi · 01-01-2013, 08:16 PM

There are film magazines for 120, 220, 70mm and Polaroid film for the Pentax 645 cameras. I'm not aware of any sort of 35mm magazine like you can find for Mamiya, et. al.

ponggo · 01-01-2013, 08:22 PM

Originally posted by Venturi

There are film magazines for 120, 220, 70mm and Polaroid film for the Pentax 645 cameras. I'm not aware of any sort of 35mm magazine like you can find for Mamiya, et. al.

yeah. i saw the mamiya one that is why i was wondering if the pentax 645 had one too.

ponggo · 01-02-2013, 07:32 PM

Originally posted by ponggo

yeah. i saw the mamiya one that is why i was wondering if the pentax 645 had one too.

so there are no 135 inserts for the 645?

**germar** · 01-03-2013, 09:34 AM

Originally posted by ponggo

so there are no 135 inserts for the 645?

I think doing that would basically turn the 645 into a very big and heavy ME Super. The whole point is the 645 format is the big image size, loading 135 film in that body takes away all advantages and leaves the weight and bulk behind. I'm sure there is a list of engineering reasons why such a mod has not been tried.

Anvh · 01-03-2013, 10:13 AM

Get a 645 converter to a 135 film camera, much easier

normhead · 01-03-2013, 10:45 AM

Or just cut the middle out of your 120 film so it fits your enlarger. (just kidding, don't try this at home.)

Bob-D659 · 01-03-2013, 09:42 PM

In theory you could make one from a 220 insert, but you are going to have to do a whole lot of work, inc making a new plate with film rails to support the film at the proper point in space. Plus a new pressure plate with film sensor contacts to tell the body you have film in it. This is ignoring the problem of rewinding the film back into a cart. Much easier and likely cheaper to buy the 645 to 35mm camera lens adapter and a matching film body.

stevebrot · 01-04-2013, 09:45 PM

Originally posted by ponggo

so there are no 135 inserts for the 645?

The answer is no.

Steve

klaus123 · 01-05-2013, 02:35 PM

Step to a 6x7 - there is a modification set available

tuco · 01-06-2013, 10:20 AM

Originally posted by germar

...
The whole point is the 645 format is the big image size, loading 135 film in that body takes away all advantages and leaves the weight and bulk behind. I'm sure there is a list of engineering reasons why such a mod has not been tried.

The 6x4.5 is small for medium format. And there is a reason to shoot 35mm film in a medium format camera. Wide panoramic aspect.

asahijock · 01-06-2013, 12:28 PM

Originally posted by stevebrot

Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll.

Steve

Not strictly relevant to the OP's question, Steve but if you were carrying a changing bag and an insert cover, it would be possible to withdraw the insert without fogging, wouldn't it? However the real issue would presumably be that on its replacement into the camera, the camera would assume that it was a new film and wind it forward as it does with a new film so you'd lose a number of frames.

That presumably only leaves as a potential solution, the removal of the insert in the changing bag and while still in the bag manual rewinding of the film back to the beginning then reloading as if it were a new film and remembering to wind forward to say one frame beyond the frame you last shot.

A lot of trouble but at least it's a way of doing it or have I missed something that prevents this working?

Thanks

asahijock

01-01-2013, 11:08 AM	#1
ponggo Junior Member Join Date: Dec 2012 Posts: 42	135 back for the 645? IS there such a thing as a 135 back for the 645? Sorry noob here seeing a lot of other medium format bodies with 135 backs but I tried googling it... but couldn't find a link for a 645 thanks!

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01-01-2013, 01:20 PM	#2
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	645 doesnt have seperated backs as far as i know, only inserts

01-01-2013, 02:01 PM	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll. Steve

01-01-2013, 07:36 PM	#4
ponggo Junior Member Join Date: Dec 2012 Posts: 42 Original Poster	Originally posted by stevebrot Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll. Steve ok. i think i got my terminology wrong. i thought you call those backs. haha (noob with film and medium format) regarding the inserts. is there an insert for 135 film?

01-01-2013, 08:16 PM	#5
Venturi Veteran Member Join Date: Mar 2008 Location: Tulsa, OK Photos: Gallery Posts: 2,636	There are film magazines for 120, 220, 70mm and Polaroid film for the Pentax 645 cameras. I'm not aware of any sort of 35mm magazine like you can find for Mamiya, et. al.

01-01-2013, 08:22 PM	#6
ponggo Junior Member Join Date: Dec 2012 Posts: 42 Original Poster	Originally posted by Venturi There are film magazines for 120, 220, 70mm and Polaroid film for the Pentax 645 cameras. I'm not aware of any sort of 35mm magazine like you can find for Mamiya, et. al. yeah. i saw the mamiya one that is why i was wondering if the pentax 645 had one too.

01-02-2013, 07:32 PM	#7
ponggo Junior Member Join Date: Dec 2012 Posts: 42 Original Poster	Originally posted by ponggo yeah. i saw the mamiya one that is why i was wondering if the pentax 645 had one too. so there are no 135 inserts for the 645?

01-03-2013, 09:34 AM	#8
germar Site Supporter Join Date: Apr 2007 Location: North Palm Beach, Florida Photos: Gallery Posts: 728	Originally posted by ponggo so there are no 135 inserts for the 645? I think doing that would basically turn the 645 into a very big and heavy ME Super. The whole point is the 645 format is the big image size, loading 135 film in that body takes away all advantages and leaves the weight and bulk behind. I'm sure there is a list of engineering reasons why such a mod has not been tried.

01-03-2013, 10:13 AM	#9
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	Get a 645 converter to a 135 film camera, much easier

01-03-2013, 10:45 AM	#10
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	Or just cut the middle out of your 120 film so it fits your enlarger. (just kidding, don't try this at home.)

01-03-2013, 09:42 PM	#11
Bob-D659 Inactive Account Join Date: Jun 2012 Location: Winnipeg, Canada Posts: 10	In theory you could make one from a 220 insert, but you are going to have to do a whole lot of work, inc making a new plate with film rails to support the film at the proper point in space. Plus a new pressure plate with film sensor contacts to tell the body you have film in it. This is ignoring the problem of rewinding the film back into a cart. Much easier and likely cheaper to buy the 645 to 35mm camera lens adapter and a matching film body.

01-04-2013, 09:45 PM	#12
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by ponggo so there are no 135 inserts for the 645? The answer is no. Steve

01-05-2013, 02:35 PM	#13
klaus123 Senior Member Join Date: Apr 2011 Location: Germany Posts: 238	Step to a 6x7 - there is a modification set available

01-06-2013, 10:20 AM	#14
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,030	Originally posted by germar ... The whole point is the 645 format is the big image size, loading 135 film in that body takes away all advantages and leaves the weight and bulk behind. I'm sure there is a list of engineering reasons why such a mod has not been tried. The 6x4.5 is small for medium format. And there is a reason to shoot 35mm film in a medium format camera. Wide panoramic aspect.

01-06-2013, 12:28 PM	#15
asahijock Senior Member Join Date: Mar 2011 Location: Northants, England Posts: 167	Originally posted by stevebrot Welcome to the forum. As noted above, the 645 does not support separate backs. Instead, film is loaded using a removable insert that can be easily loaded in advance. They cannot, however, be hot-swapped, mid-roll. Steve Not strictly relevant to the OP's question, Steve but if you were carrying a changing bag and an insert cover, it would be possible to withdraw the insert without fogging, wouldn't it? However the real issue would presumably be that on its replacement into the camera, the camera would assume that it was a new film and wind it forward as it does with a new film so you'd lose a number of frames. That presumably only leaves as a potential solution, the removal of the insert in the changing bag and while still in the bag manual rewinding of the film back to the beginning then reloading as if it were a new film and remembering to wind forward to say one frame beyond the frame you last shot. A lot of trouble but at least it's a way of doing it or have I missed something that prevents this working? Thanks asahijock