- Joined
- Nov 15, 2011
- Messages
- 199
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- 35mm
Or, you're like me and find that shadow detail isn't all that important. Sometimes it can be, but it depends on the picture.
To me the overall appearance of the photograph is a lot more important, and the shadows, while important, are mostly one piece of the puzzle.
blah blah blah
- Thomas
If your shadows "look a little thin" when you push Tri-X to 800, it's because they are. Pushing film means you're intentionally underexposing it and trying to salvage detail in the shadows while propping up the midtones and highlights by overdeveloping a little.
I also have some Tri-X (OK, actually Arista Premium) I exposed indoors at ISO800. I too was thinking of HC-110. Kodak suggests no adjustment of developing times but that seems to trust too much to the gods of exposure latitude.
I also have a quart of Acufine around; it's older, but a sealed can.
Everything you said here is true, but isn't it a little overstated? The implication of what you say seems to be that there just ain't much more detail in the shadows in the latent image, i.e., that we normally come very close to developing "the shadows" (whatever that means; Zones I-III or so?) to completion in a typically-exposed-and-developed frame. I can't find a definitive answer, but my feeling from experience (based on things like experiments in ridiculous overdevelopment) is otherwise.
This seems like something that must be known, doesn't it? I guess I'm asking for a characteristic curve for the latent image, a mapping from amount of exposure to density of activated silver grains.
-NT
I also have some Tri-X (OK, actually Arista Premium) I exposed indoors at ISO800. I too was thinking of HC-110. Kodak suggests no adjustment of developing times but that seems to trust too much to the gods of exposure latitude.
I also have a quart of Acufine around; it's older, but a sealed can.
I don't think that the gods of exposure latitude are even involved. It is their cousins, the gods of exposure compromise.
Remember, pushing does almost nothing to add shadow detail. What it does do is increase density and therefore contrast in the near shadows, midtones and highlights and therefore improve the appearance of the near shadows and midtones. The increase in density and contrast in the highlights degrades (at least slightly) the quality of the highlight reproduction.
When Kodak is recommending no change in development time, they are essentially saying that with a one-stop "push" increase in development time, the benefit achieved in the near-shadow and midtone areas is of less value than the detriment experienced in the highlights. No doubt that turns mostly on the fact that the film does an excellent job capturing detail in those near-shadow and midtone regions, even when under-exposed by a stop.
Could you please elaborate on that, the overdeveloping with flat light and pushing. I live in a place where we are plagued by flat light (not something that I like most of the time) and I've been trying to figure out a way to get more contrasty negatives. I usually end up pushing Tri-X to 800 or 1600, but I do end up running into problems with lower contrast a lot of the time. I would gladly appreciate any more tips!What's not being mentioned here about pushing film is that when shooting in flat low light such as dark cloudy days most of the tones are close together, and the subject brightness range is rather low (excluding sky). By pushing film up to one stop we are really placing the overall scene up to one zone lower, so the shadows are placed where they should be anyway. Then we extend development to bring the midtones and upper midtones back up. I regularly shoot Tri-x and HP5 pushed up to one stop in flat lighting (overcast) and overdevelop to gain very nice contrast. If spot metering is used that's a whole different story.
I can't think of a time I ever disagreed with Matt and this is no exception. Exposure determines your shadow detail moreso than pushing your film. You can't get something from nothing.
While I agree with you about getting 'something' from 'nothing', the case is usually that a lot of the 'lost' shadow detail ends up on the toe of the film curve, lost in 'film base plus fog' density. By under exposing film on purpose, and over developing, some of that shadow detail on the toe can be 'pushed' back up onto a portion of the curve, where it's no longer obscured by the densities of film base plus fog.
Some developers are better than others at this, and this is why dilute developers, like Xtol 1+1 is better than stock - longer developing time brings out more shadows. Not a fantastic amount, but it does help, and it is real.
I put in the word "moreso" because I do realize that if it's in there longer, shadows will come out a bit more, but then you'll blow your highlights way out of proportion by overdeveloping. Shadows stop developing first in the developing process and after a point, they are incredibly difficult to budge without blowing out your highlights.
That being said, I'm not sure how the logic of under exposing and over developing can bring out shadow details can be consistent. There would be less density in the shadows in that case.
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