I loved APX100, but only shot it in 35mm. I will be anxious to try APX400 in 4x5! I am about to order some more 4x5 so I am going to get some 400 and give it a go.
I am enjoying all the information this thread is producing.
i do all the time barry
i over expose it and over develop it
and LOVE the results
i also like to use it because 400 ( i rate it at 300 or 200 )
offers me 1 more stop if i am photographing an interior..
( and there is NO uv blocking layer ! )
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I use a lot if 400 (HP5 rated at 320) as I need a fairly fast shutter speed on the gray days that we tend to have in the UK. However recently I have been experimenting with Fomapan 100 (rated at 50) and actually like the contrast I am getting with it. On a still day I now use as slow a film as I can get away with. I have a very old meniscus lens mounted in a modern press shutter that really needs to be used wide open to get the full effect. When its very bright these slow films come in very handy.
I have used Tri-X 320 for decades. For my process, it gets rated at EI 160, so it's not substantially faster than FP4+, which I rate at 80-125 depending on the scene. I have used T-Max 400 in 4x5, and I like it, but I haven't used it lately. I don't find myself needing the faster film these days. My exposures tend to be long.