150mm lens distance to film plane

[Davidenglish]

Eh? Wot? Do you want to focus the lens?

If so, just slide the front standard forward from its rearmost position until the image on the GG is more-or-less in focus, then make fine adjustments. How far out you'll have to slide the standard forward from its rearmost position depends on how far away the subject is. There's no need to determine how far forward is far enough in advance, and no reason to mark the "in focus" distance on the bed unless you're going to shoot only at that distance.

That sounds like practical way to do it..

[Alan Gales]

That sounds like practical way to do it..

What Dan is telling you is the normal way of doing it with most cameras. The Chamonix is a Phillips design which has a series of holes that you first have to screw your front standard into. Then you can do as Dan is telling you. Greg makes good sense telling you to mark your holes for your various lenses. It's a fast way to do it.

[Dan Fromm]

Alan, thanks for enlightening me.

[Alan Gales]

Alan, thanks for enlightening me.

You're very welcome, Dan. You have enlightened me plenty of times. About time I returned the favor!