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Author Topic: Pentax 645 -> Mamiya 645 Conversion  (Read 3857 times)

MarkWelsh

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Pentax 645 -> Mamiya 645 Conversion
« on: July 31, 2007, 10:13:18 am »

Given that one or two have expressed an interest in the possibility of using their Pentax 645 lenses on Mamiya 645 bodies, it seemed sensible to start a thread dedicated to this topic.

Though Mamiya makes some excellent lenses in the M645 mount, there are many users of Pentax MF cameras currently without digital options. If you're thinking on switching to Mamiya in the absence of the 645D, it would be nice to keep all your existing glass, at least at first. There are also several outstanding Pentax 645 lenses that simply outperform the Mamiya equivalent: the FA 35mm f3.5 Pentax is perhaps the best example: Review  and lpmm data here

Zörk in Germany has investigated the possibility of making an adaptor, but aborted their plans because they weren't happy with the rigidity of the resulting product: the registration distance is 'only' about 7mm. I've also started down this line, but spent an interesting morning with my lens repairman today investigating other avenues.

At this point, it looks like a reversible mount conversion could be done relatively cheaply (ie, less than $200). In some ways this would be more satisfactory than a very thin adaptor, though I haven't ruled out the possibility at this point. Either way, I should have some Pentax v Mamiya tests available soon, so we can tell whether the game is worth the candle!
« Last Edit: July 31, 2007, 10:16:56 am by MarkWelsh »
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stefan marquardt

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Pentax 645 -> Mamiya 645 Conversion
« Reply #1 on: September 14, 2007, 08:43:50 am »

Quote
At this point, it looks like a reversible mount conversion could be done relatively cheaply (ie, less than $200). In some ways this would be more satisfactory than a very thin adaptor, though I haven't ruled out the possibility at this point.
[a href=\"index.php?act=findpost&pid=130830\"][{POST_SNAPBACK}][/a]


hi mark, did you get any further in your investigations?
 personaly I would be very interessted to get my pentax 35 converted to mamiya.

thanks stefan
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stefan marquardt
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MarkWelsh

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Pentax 645 -> Mamiya 645 Conversion
« Reply #2 on: September 15, 2007, 07:34:37 am »

Quote
hi mark, did you get any further in your investigations?
 personaly I would be very interessted to get my pentax 35 converted to mamiya.

thanks stefan
[a href=\"index.php?act=findpost&pid=139371\"][{POST_SNAPBACK}][/a]

I have managed to convert some of my Pentax lenses, but the FA35 looks like it may also require a minor adjustment to the AFD mirror in order to clear the rear element. This is quite do-able, but I've moved out of the Mamiya system altogether, so will not be taking this any further. If you wanted any advice on the conversion, just shout!
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