i shoot about 50-60% (250-300 rolls/year) of my stuff with movie stock. Mainly Double XX but at the moment I am using up my last 400 ft of Agfapan 250 (Agfa's version of XX). There are still movies being shot on Black/white stock. George Clooney's latest "The Good German" and "Good Night and Good Luck" are a pair of them. Bl/w stock is still used in a lot of the Music Video's too.
There is really no problem using it, except with motor-drives as the pitch is slightly different and it can jam. The Horizon 202 Panorama camera is also sensitive to it.
I did not know about Ilford still producing movie stock. Can anybody shed some light on availability? Fuji in Japan makes some stock, although i dont know which emulsions are available.
The movie stock usually came in 400/1000 or 3000 ft length. Occasionally you can get it from Movie supply houses if they have mixed emulsion numbers. The cine guys wants all the same emulsion# and occasionally there are cans left with mismatched #.
Beware of older emulsions like DuPont Superia as these have REM backing. This is carbon powder embedded in the anti halation backing and unlsess you have the stuff for removing it, the film is useless. You can do it by hand, but you will also end up covered in coal-dust and most often with scratched negatives as the REM backing does not want to come off (you literally scrub it off!).
If you check with Kodak you have to go to their Movie Film Division as the "regular" film guys dont know or wont tell you!
Latest price I had on the XX was $127/400ft (2006 November). That will give you about 75 rolls. You can process it in D 76/X-tol or what ever you are using. It usually requires about 10-15% less time, but that depends if you are shooting it at rated speed 250 ASA or if you fiddle with the setting. It will "pull" about one stop and look really good, but it does not push process very well- 400 ASA is about tops.
You will also find that the emulsion has a tendency to have more small specks or gelatine clumps in it. This film is designed to be feed through a projector at 24/25 frames/second and a small speck is not going to show. Of course, when you shoot still pictures - it will be firmly planted right on the nose of your subject!
If you really want to see what GOOD black/white movie stock can do. rent Orson Welles "The Third Man". The ligthtening and the 'contrast' on that film is spectacular. Each shot is a superb still shot- I freezeframe some of the shots and just drool over the quality!
These stocks are coated with a 'slippery" surface as they are made to go through duplicating machines and Neg. to Pos. systems, using mechanical devices. This also means that if you use old style reloadables with spring catches, they are prone to come off and go "flap,flap" at the end of the roll! Use gaffers tape (available from movie supply places to) to tape it onto the take up spool.