Fuji FP100c in RB67

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maclin

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When using the NPC polaroid back on my RB67Pro S w/90mm f3.8, the resulting image is approx 2 7/8 x 2 7/8.
Is this the normal result, or am I doing something wrong? :confused:
Any help/advice would be appreciated. I'm really new to MF.

Gary
 
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maclin

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Thanks, Keith. MF is a new world !
 

brofkand

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That is amazing, an emulsion transfer. I do it with 669, but I hear the new Fuji emulsion is much thicker and easier to transfer. Can you confirm or deny, keith?
 

archphoto

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Gary,

Your RB as actualy a 8x8cm camera.
This design allows you to take horizontal and vertical pictures with the same camera-position with the W(aist)L(evel)F(inder).
That's why you have a rotating back.

Mostly 6x7cm backs are sold, but there are 6x8cm backs aswell, even 6x4,5cm backs.
You will not see the 6x8cm backs verry often though and I don't see any good reason for having a 6x4,5cm back: using a heavy camera for a small format like that....

You will see the same priciple with standard LF camera's like 4x5 inch and 8x10 inch.
Both have square backs, so 4x5 inch has a 5x5 inch standars, back and front and bellows, the 8x10 inch is a 10x10 inch camera.
The only exeptions to this "rule" are some specialty camera's like 4x10 inch wooden ones.

Keep your eyes open, try to understand the designs and learn....
Welcome to the world of the big MF, LF and ULF camera's.

Peter
 

keithwms

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Peter, while it is true that the rbs can deliver 8x8, and most of the lenses easily cover that, the body will not deliver 8x8 without modification. I have modified my rb67 pro sd to provide almost 8x8 cm images on 4x5 film (type 55 and quickloads). This involves removing part of the mirror damper / catches in the chamber of the camera... otherwise you wind up with a frame the shape of a rhombus, with the top of your image having a shadow that narrows to about 72mm. Anyway, after my modifications, the camera works as good as ever. I think I get something like 78x78mm. If anybody wants more, they may as well just put the rb lens on a view camera like Erie does.

Brofkand, confirmed! The fuji emulsion transfers are *far* more robust than the polaroid ones. You can stretch and poke and whatever. Really good fun.

There are two things you need to know, though: (1) they will not adhere by themselves to your new paper like polaroid did: you'll need to attach them with glue (personally, I see no point in rolling them flat with glue, I like the 3D look and simply let the transfers float over the paper, adhered only at the edges); and (2) unfortunately the b&w emulsions do not seem to come off; I have boiled fp100b for ages and can't get it off.

Oh, and beware that (3) image transfer is an entirely different thing with the fuji materials.
 

archphoto

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Keith, what you are saying is: 6x7 without modifications, 6x8 with quite a bit of work.
Will keep mine at 6x7 for now.....
Thanks for the info, it gives me a better idea how my RB sytem should look like.

Peter
 

keithwms

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Well, the rb 6x8 (motorized) back does gives you more than the 6x7; however it definitely doesn't give you 80mm along the long end. The back is masked to about 75mm and you wind up with 76 or so on the film. You can't get more along the horizontal direction without getting into modifying the innards. I think 78+ along the vertical is doable quite easily, but the 6x8 back is made so that you don't get shadowing in either orientation.

The rb bodies are so inexpensive, I'd say go on and modify :wink: I have been thinking about making a monster rb tlr in which one body has no innards at all (no mirror) and another is on top with just the mirror. That kind of lunacy appeals to me on some level.

P.S. also, and this may be obvious: how much shadowing you get from the mirror catch in the chamber of the body depends on the focal length.
 

tim elder

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Speaking of the motorized back, I've always been curious about them when they have been listed for sale at KEH. Do they work on the Pro-S series of RB's, and why are they motorized?

Tim
 

archphoto

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Keith..... a RBT 67..: it shure would be a monster !
Mounting them together: OK, but dual coupled focussing, 2 matching lenses, the sheer weight.
You would not need the mirror in the picture taking part and you could use a not working shutter in the focussing lens.
The camera would be a quiet one like the regular TLR's
Maybe nice for the studio with dual 180's

Actualy I was thinking of using the 6x8 back with the 50C: got a better idea: use my 4x5 and 58XL for that.

Peter
 

keithwms

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Speaking of the motorized back, I've always been curious about them when they have been listed for sale at KEH. Do they work on the Pro-S series of RB's, and why are they motorized?

Tim

Tim, I'm quite sure that the 6x8 back will go on all the RB models- the mount looks exactly the same. But I can loan the back to my buddy Richard who has a pro S and get a definitive answer for you.

As for why mamiya brought out the motorized 6x7 and 6x8 backs... I don't know. I and many others would prefer a totally mechanical back, to be honest. On the other hand, the price is low.

More info...

http://www.mamiya.com/rb67-pro-sd-a...nes,-holders-inserts-roll-film-magazines.html
 
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