The only black and white slide film I've tried (I was given a roll,
process-paid, by a camera shop where I had films developed - they probably
couldn't sell it!) was horrendously slow - about 25 ASA - and gave very
moody, contrasty results, with a lot of highlight and shadow detail missing.
It certainly didn't have the tonal range of Kodachrome or Ektachrome but in
black and white.
But I think that was unusual. In general, slides give better dynamic range
than prints. However, it is the printing stage where you lose extreme tonal
detail with prints: I was gobsmacked the first time I scanned a negative and
compared it with the print that the shop had made: there was a lot of
highlight and shadow detail in the negative that had been crushed to black
or white on the print.
On Tuesday, 16 October 2018 16:09:34 UTC+1, NY wrote:
I used agfa dira-direct at 32 ASA difficult to get and expensive which is w
hy we used stock pan F which was cheap and DIY develop it for RAW chemicals
from the chemisry lab.
I remmeber we had do downrate the film and expose for longer than the 50 AS
A pan F was rated at IIRC 10 ASA was nearer the mark so we went to FP4 125
asa and rated it at about 50 asa.
We weren't really interested in that, it was the process.
But that also depends on your technique, don;t forget printing papers came
in many types and weights and contrast even I had grades 0-5 and I think yo
u could get an extended range. There was also matt, pearl, stipple, glossy
and many semi finishes which also affect the look of the final print.
Then you could use a glazzing machine for a super gloss finish, which had
the effect of increasing contrast and sharpness.
They may have a greater dynamic range on the slide, but remember the
projected 'black' is actually a white screen illuminated by the light in
A black and white slide would have higher dynamic range if shown on an
OLED TV in a darkened room, as the blacks will be deeper as the screen
itself is dark and there is no breakthrough from the screen backlight.
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