user manual for Mamiya 645 extension tubes?

[reellis67]

Greg,

I extrapolated the way these numbers were calculated (using the bellows extension formula) and found that by adding rings you need to add *more* compensation than you would get by just adding the individual factors together (due to squaring in the formula). I updated that web page with the results, but it should be noted that I am *assuming* this is the correct way to calculate these figures.

- Randy

[Greg_E]

Thanks, it at least gives me a ballpark to start in. I guess I could just use the meter finders, but I truly like to use the waist level finder for most of what I shoot. And I can fine tune this with my digital back when I get to some testing. If I ever get to where I'm doing a lot of macro work, I'll probably buy the bellows extension and reversing rings (etc.).

[reellis67]

Hope you've got lots of disposable cash for that bellows. The last one I saw went for almost $500 US, without the dual cable release...

- Randy

[Greg_E]

Yeah, I saw that too. Maybe at that point I'll just build my own.

[Mike Té]

Hi, Greg.

I have an instruction manual for my extension tubes. You can buy it from Craig Camera, $15:

http://www.craigcamera.com/ib_m.htm

Item no. #MAM-182

Cheers.

[altair]

Any scanned copy of the M645 extension tube online? I'm having trouble attaching them correctly to my M645 Super body & lenses..that rotating ring & the need to align it with the aperture coupler pin is really driving me nuts! I screwed it up once & now my aperture coupler pin is kinda bent. Helpppp anyone?

[MattKing]

Any scanned copy of the M645 extension tube online? I'm having trouble attaching them correctly to my M645 Super body & lenses..that rotating ring & the need to align it with the aperture coupler pin is really driving me nuts! I screwed it up once & now my aperture coupler pin is kinda bent. Helpppp anyone?

Mike Butkus' site has one - I'd suggest sending him the requested donation.

http://www.cameramanuals.org/mamiya_...sion_rings.pdf

[altair]

MattKing: Thanks Matt. I've donated to Mr Butkus a couple of times in the past, and will do so again now. Thanks again.