I think that it's best to leave options open, so I usually attempt to insure I have enough shadow information and avoid blocked up highlights in the negatives. It makes things easier come printing time, and I use printing technique to 'hide' content. It's much easier to 'hide' details that are present in a negative, than to try to reveal something that isn't there.
Totally depends on the subject matter and one's personal aesthetic/preferences. No rules.
But with such 'underexposure' of the negative the highlights usually benefit through better separation, as they are not so far up the exposure curve and into the more contracted 'shoulder' area. - David Lyga
Depending on the film/developer combination, the highlights should maintain full separations up to pretty high levels (at least ~Zone XII in ZS parlance) with good-to-useable separations thereafter up to ~Zone XV, provided normal or mildly contracted development is applied. Big time underdevelopment and/or compensating procedures significantly flatten highlight contrast (effectively blocking highlights but with lower densities) so they must be carefully used. This is why when dealing with very high contrast subjects I suggest considering printing techniques when making the exposure/development decision at the scene.
Yes, if you have enough oomph in your light source to actually shine through those dense highlights without going into reciprocity failure territory of the paper... I love my Leitz V35 enlarger, and it has taken a little while to get calibrated with my negatives such that I have enough contrast, but also able to stay under 2 minute exposure times one or two stops from wide open on the enlarger lens.
But one photographer that does dark shadows well is Ralph Gibson.
http://www.ralphgibson.com/gallery.html
Thomas, I'm having trouble imagining a negative that requires a 2 minute enlarger exposure with a lens aperture of f5.6. I've been in photography professionally and can't remember making enlarger exposures more than 45 seconds or so under conditions where a neg was grossly overexposed.
Perhaps a typo? Or do you have a lot of filtering in the light path? Please explain.
It's a creative call. I have this engrained habit of always exposing for shadow detail. If I decide not to have it in my final print, I burn in the shadows or bump up the contrast. Aesthetically, for my images, I like shadow detail. My images can look too heavy if there are inky shadows. But one photographer that does dark shadows well is Ralph Gibson.
http://www.ralphgibson.com/gallery.html
I don't find Thomas's numbers strange. There are several variables. But I have quite a few images that can require highlight burning sequences in the minutes depending on the enlarger used. As long as your negative stays flat, no problem.
And Gibson both overexposes and overdevelops... Isn't that funny?!
Thanks, Thomas, for taking the time for an explanation; I learn something new each day!
It's always good to have some shadow detail in the bank with your negs right? You might want to use it later. If you want no shadow detail by under exposing your film, you're sure of yourself. It's like doing a crossword puzzle with a pen.
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