Re: [KOML] Enlargers

[Mel Brown <melbrown@eatel.net>]

Richard Jakowski wrote:

> Good morning to the KO group-
>
> As a change of pace to the recent chat regarding critical focus and depth of
> field I have a question about enlargers.
>
> I have a big old Beseler Model CB7 with a motor driven movement of the
> housing and a built in electronic timer. The thing is awkward as H--- to move
> around and must weigh at least 80 pounds. It was used exclusively for 35mm
> negatives when I got it and has a 1:5.6/135 Schneider-Kreuznach lens. Other
> than a 6X7mm film holder what will I need for a lens. I'm assuming the lens I
> have is best suited for 35mm work but I don't know for sure.
>
> Does anyone know anything about this enlarger? Is it just a big ole outdated
> dog or can it be used to advantage with medium format stuff?

I, too, have a CB7 that I've used for everything from 35mm to 4x5, color and b&w.
Mine has only a condensor head, so except for 4x5, I now do everything on my 6x7
Philips PCS 130/150. The CB7 is a fine beast, with its removable baseboard and
2-speed electric focus, and will work well with MF. Your 135mm lens is definitely
not suited for 35mm. It is designed for 4x5. You can use it for 6x7, but compared
to a proper length lens, your magnification will be limited. (The longer the
lens, the larger the negative it will cover, but the less magnification you will
get for a given height.) A good lens would be an 80mm f/4 Schneider Componon-S or
Rodenstock Rodagon. Consider it an investment since you can migrate the lens to
another enlarger, if you so choose.

You will need a set of 6"x6" filters, probably available from B&H. There may be
multigrade filters available, but I recommend getting CP (color printing) filters
so you can do both color and b&w. My enlarger was missing the filter tray, so I
made one from cardboard.

If you're put off by the idea of having to shuffle acetate filters, you may find
it a better idea to sell the CB7 and put the money toward the purchase of a MF
enlarger with a color head. I'm strongly biased toward my Philips, but any of
several others will serve you well.

Mel Brown