timwitt Posted May 23, 2007 Share Posted May 23, 2007 I've been shooting it at 400 but I wonder what more experienced photographers shoot it. (those who shoot BW400CN) Link to comment Share on other sites More sharing options...
john_newell2 Posted May 23, 2007 Share Posted May 23, 2007 Shot a couple of rolls (my first) on Mothers Day (I am a risk taker, no?) at 320. Results were very satisfactory, both in the shadows and highlights. Link to comment Share on other sites More sharing options...
robert himmelright Posted May 23, 2007 Share Posted May 23, 2007 I waver between 320 and 400. Link to comment Share on other sites More sharing options...
profhlynnjones Posted May 24, 2007 Share Posted May 24, 2007 It works fine at 400. Lynn Link to comment Share on other sites More sharing options...
joe_nash1 Posted May 24, 2007 Share Posted May 24, 2007 I shoot between 320/400 as well. If really bright out I shoot at 400, cloudy or shadows I shoot at 320. Remember you are just tricking your camera anyway. I sometimes switch mid roll, don't worry about that when you get the film developed. The stuff has great latitude. Link to comment Share on other sites More sharing options...
silverhalide Posted May 25, 2007 Share Posted May 25, 2007 Tim, Having done ISO standardization tests over the years with students & using a densitometer, we found 400 to be right on. At 400 it actually gives correct density for Zone one. The film has a full f. stop of extra density in the shadows. Hence the same development time for ISO 400 & 800 in TMax developer. At 800 it would be closer to HP5+, TX & a little more dense than XP2 in the shadows or lower Zones. Therefore, there is little reason to shoot at a lower ISO. If it were XP2, ISO 300 gets it a lot closer to HP5 in the shadows which is where ISO is determined. Zone I for TMax & Zone II for coventional films. This is totally based on 35mm. Michael Link to comment Share on other sites More sharing options...
jerry_kirkwood Posted May 27, 2007 Share Posted May 27, 2007 As a LF shooter I'm used to having my lens shutters tested and keep a cheat sheet with their actual speeds. Most people don't do that with smaller formats (me included). If I'm using a camera with a mechanically timed shutter I tend to expose at 400 because those kind generally tend to vary mostly on the side of dragging, so if there's an error in exposure it'll be on the overexposed side, which will still print ok. The C41 films really hate to be underexposed, even a stop looks awful most of the time. If I was using a modern battery powered shutter I'd probably rate the film at 320 just to tighten the grain a bit. Even though you can print the negs if its overexposed 2-3 stops, things start to go downhill a bit after 1 stop over. Link to comment Share on other sites More sharing options...
franka t.l. Posted May 28, 2007 Share Posted May 28, 2007 I rate it at 250 ISO and meter, shoot and compensate as such .. Link to comment Share on other sites More sharing options...
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