2F/2F wrote:
I certainly cannot mount my old Voigtländer Petzval copy on my Speed, even though it is only about 240mm. It is just too fat.
So one would think, 2F, so one would think.
I have a number of lenses in barrel that are much too fat to pass through my little 2x3 Pacemaker Speed's front standard. If you think your 4x5's boards and front standard are small, just look at my 2x3's. Tiny by comparison, but I don't feel deprived.
But and however, if the fat lens has long enough back focus it can often be mounted entirely in front of the board. For more information about mounting lenses in front of a Pacemaker Graphic's lens board, see
http://www.galerie-photo.com/telechargement/dan-fromm-6x9-lenses-v2-2011-03-29.pdf
You'll see that a lens that looks like it would interfere with, e.g., the lens board sliders, can in fact be mounted entirely in front of the board. Look at how my little Uran-27 is attached to a board. And my 100/5.6 S.F.O.M. and 12"/4 TTH tele too. Fat barrels aren't the impediment they seem. Short back focus, however, can be a killer. Re that, look at how my little 60/14 Perigraphe is mounted for use on my Century Graphic.
Again, there are limits. 4x5 Pacemakers' maximum extension is on the order of 12"; this limits the use of long non-tele lenses on them. My little 2x3s are, of course, shorter still. One solution to this is to use two Graphics set up front-to-rear with a coupler between. I've done it. The longest lens I use on my little tandem Graphic is 480/9 Apo-Nikkor.
Insufficient extension isn't the only limit. As you pointed out, the Graphic tapered bellows
can limit what can be stuffed behind the front standard. I've found my 2x3s' gates more limiting. I have a couple of 210/5.6 plasmat types whose rear cells won't go through. Not a problem with a 4x5 Graphic, but it certainly is for 2x3s.
Go be inventive. I've pointed you at some tricks that
may let you use your 240 Petzval on your Speed. I say "may" because I don't know the lens' back focus. I think a 4x5 Speed should be able to focus a 240 to infinity, especially with the lens entirely in front of the front standard, but I don't know whether it will focus the lens close enough for your purposes. Ask it, and then you'll know. FWIW, with a little cheating that I'm not going to explain -- finding the trick will be a good exercise for you -- I can use a 305/9 Apo-Nikkor on my little 2x3 Speed.