I can pick up the developer alternative to Adotech IV hunt, after I get a few other projects out of the way!
Usually the masks are for 6x6 with a 6x9 folding camera. Sometimes these are two flaps that fold away for 6x9, and out across the film gate for 6x6.
Ian
Now looking for a 127mm lens.
Or you can use a Caffenol variant -- Caffenol LC+C, which I've used in the past for Imagelink and Copex Rapid microfilm stocks (and old CMS 20, around 2006).
If the two windows are in line on the bottom (or top, depending on winding knob/key location), any mask would be for 6x4.5. If one is in a corner of the back and the other in the center, it'd be a 6x6 mask.
Be careful -- those were the most-used lens on these cameras, many of them have seen a million or more shutter cycles. I'd suggest specifically looking for a recently serviced example -- I didn't and I'm looking at $200+ to get the slow shutter serviced -- or 2/3 that to roll the dice again. I'd suggest a 90 mm instead, if you don't mind "normal" instead of "portrait" focal length.
I do find it difficult getting a good used lens.
Be careful -- those were the most-used lens on these cameras, many of them have seen a million or more shutter cycles. I'd suggest specifically looking for a recently serviced example -- I didn't and I'm looking at $200+ to get the slow shutter serviced -- or 2/3 that to roll the dice again. I'd suggest a 90 mm instead, if you don't mind "normal" instead of "portrait" focal length.
127mm f4.5 Ysarex is an excellent lens, and is probably the best choice. Like the 127mm f4.5 Ektar
We were talking about Sekor and Sekor C lenses for RB67, Ian. The choices are much broader and focal lengths much closer together for quarter plate and 4x5...
I've got 50, 90, 150 Soft (with disks!), 185, and 250; the only one I've had trouble with is the 127.
Gets almost impossible in a very general thread about latest purchases
Those could be LF lenses . . . . . . . . . . .
A rain sleeve was the most recent purchase. But I received a Yashica Yashinon-DX M42 200mm f4 lens almost simultaneously in the mail. Not sure which counts.
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