I am dwelling upon a B&W negative I made using a very small aperture (two
stops smaller than F90).
But about diffraction and color - I realize that diffraction degrades
sharpness, but exactly what effect does color (frequency) have? How might

Anyone actually shot some skies, etc. and determined if the Schneider 3b
center filter is necessary with this lens? Seem to get conflicting
opinions... which of course doesn't surprise me...  :)
I'm thinking of adding this lens at some point (I have the center filter for

"It comes with 135 lens, several filters, film backs for
120 and polorid film, cabel realses, and metal
carrying case."  
                           -- The seller.

I have a couple of barrel lenses I plan to use in shutters, a 210 kowa
grapkic & 305 g claron. I have read/heard that the cell spacing will
differ depending on application, that the cells should be spaced
farther apart for maximum performance in the center of the field, and

We tried an experiment in this issue. We presented the Robert Smith Portfolio
w/o text. We did this to present the work as I'd first seen it at Photo
Americas in Portland in April and then again at PhotoArts Santa Fe in July. He
showed the work as small prints with large white mats. ...

Hi, All...
Is there a specific thickness for ground glass?
The reason I ask is that I'm trying to get my Ansco 5x7 going. I have a 4x5
back for it, and a sliding split 5x7 back for it, but the 5x7 split back

I bought a Crown Grafic with a Optar 135 f4.7. It's in pretty good
shape, but I suspect the shutter is off at slow speeds. Anybody suggest
a good and not too expensive place to get it cleaned and adjusted?

The latest issue of View Camera shifts the balance of presenting material in
print and supplementary material online.
As concerns online material:
the pros:

Does anyone out there exhibit regularly, have work in museums, and/or are you
represented by commercial galleries?
I've shown a lot of prints at restaurants, cafes, bookstores, and the like,
and sold a certain amount of work. After sixteen years of pretty serious

Actually a 2-part ?: one specific, the other general.
1. I'd like to swap lenses between two old Compur shutters of the same size
(both of which will accept a 105mm CZJ Tessar); one's the old style (dialset)
while the other is newer (rimset). Does anyone know if the cell spacing ...

With a bended knee and furrowed brow, I have sought to break the arrows of my
own battlefield. I cannot speak the sorrow, but chose to write this now.
To convey much pain of what we saw, the here, the now, the waste of it all.
The burning embers as you looked away, from

I learned that the way to present a quality b/w photo is to heat press
it onto matt board, then lay an overmatt on top that doesn't touch the
edges of the photo, then frame.  A guy at my local frame shop says no
piece of art work should be permanently attached to anything like ...

We are taking a break from the regularly scheduled flame broiling to deliver
this community service message:
http://www.largeformatphotography.info/lfforum/
Jon  :)

Critique, please.  Would the following work? Mark the outside of the lens
where it abuts the shutter, remove the shutter, open the diaphram all the
way, put the lens into B or T, put a small piece of clay on the lens
(back) and reassemble so that the clay is pressed between the lens

Some time back I posted a question about modifying a Tachihara 4x5 for front
axis tilt.  The general response seemed to be "give it a try", so I finally
did it. I removed the two little tabs that line the front lensboard up in
the front standard of my Tachihara.  As of this morning ...