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Slide holding for Scanning - Ohnar and Other Options

Started May 21, 2021 | Questions thread
petrochemist Veteran Member • Posts: 3,619
Re: 80mm f/4 enlarger lens - a compromise

Halina3000 wrote:

Thanks. i've been thinking about this some more but have reached a bit of an impasse. As far as I can see my test results show that a 50mm enlarger lens is not going to work with the BPM bellows. Without the bellows there is no way to focus.

You could replace the bellows with a helicoid - these are available in a wide range of lengths. I think between my helicoids I have every length from 10mm to 90mm covered without combining helicoids, or adding extension tubes.

Most options are available as m42-m42 (the outer end of which is very easily adapted to m39 for most enlarger lenses)

I suspect the 30-90mm length would combine well with a standard m42 adapter for your camera it should give you roughly half life size to two and a half times with a 50mm lens.

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