Posted by Les Newcomer on November 03, 2000 at 20:50:45:
In Reply to: Re: Beginnerquestions Speedgraphic 3x4 posted by Gerald Pierce on November 03, 2000 at 17:28:06:
: : : 127mm/4.7 Ektar and which aperture is the sharpest?
f11-f16 is the sweet spot, beyond f22 diffraction limits sharpness.
: : : 7, What is the longest lens I can use on my
Pacemaker
: : : Speedgrphic 3x4?
An 8" lens will work, an 8" telephoto will allow
closer focusing (see the posts on 10" teleoptar as
to why) a 10" tele will also work well.
: : : 8, Is there any possibility to adapt a 4x5 rollfilm
: : : holder to my 3x4 Graflok back? But I still like to do
: : : ground glass composition. So it must work like a sheet
: : : film holder. Which one and which is the cheapest that
: : : wood be working good? Is it hard to do?
I've never seen a slip in roll holder for 3x4. The best bet would be to buy a Calument C2 or C2N roll holder ($100-150 on ebay) and take it to a machinist with an equal amount of money and say please.
: : : 11, Is there a big problem with sheet film holders
and
: : : dust particles because I have to cut down my film
: : : sheets (3x4)? Which is the best way to do this?
: : A can of "Dust-off" compressed air?
I would tape down some of the cardboard that comes in 4x5 sheet film (ask some pros near you) to a film cutter. This material is less likely to scratch the film and is not radioactive. Then set some stops on the cutter.Make these out of matteboard and tape. By varing the number of pieces of card board that is taped down for each step (There are two steps, one for each cut) you should be able to do this with your eyes closed and not trim your fingers.
Dust off works, Compressed air is cheaper in the long run. Keeping a clean, humidified work area helps a great deal.