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- Jul 14, 2011
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- 8x10 Format
Lots of questionable generalizations. I don't know who came up with the finer the grain, the better the tonality, or whatever. How is that notion justified?
(Some text deleted).
Then there were those Kodak Tech Pan BS ads back then telling people they could get 4X5 quality from a 35mm camera if they used Tech Pan. But Tech Pan is exactly that - an extremely fine-grained technical film with miserable tonality. I used it clear up to 8x10 size for forensic purposes, like detecting fraudulent paintings. Most of those extremely fine-grain films have wretched tonality, even using special developers.
I already mentioned how HP5 - a rather large grained film - can be turned into a "watercolor grain" film with almost no visible grain in the print, yet very high edge acutance giving the appearance of sharpness.
I shoot TMax 100 and 400 in every format category from 35mm to 8x10. I shot it when it was first introduced. But you're exaggerating when you seem to equate its 35mm performance to MF results from other medium speed films.
I think I understand enlarging too. When I refer to a 30X40 print, I mean 30X40 inches, not centimeters.
Your postulate that finer grain films equate to better tonality doesn't make any sense at all.
Pan F can be a lovely film under certain conditions, but its contrast range is so limited, and its development malleability so constricted, that you don't have a whole lot of tools to expand microtonality with.
Then there were those Kodak Tech Pan BS ads back then telling people they could get 4X5 quality from a 35mm camera if they used Tech Pan. But Tech Pan is exactly that - an extremely fine-grained technical film with miserable tonality.
But in today's world, Tmax etc. are available in sheet formats. If they were capable of medium format performance in 1990, they can do even better in large format in 2024.
TM100 in 4X5 - I can't even find the grain with my enlarger loupe. I look for a sharp edge and focus on that.
Because their R&D for finer grained films have been driven also by the aim to improve the tonal transitions and graduations. Every time when I talked to the film staffs at the biggest photo fair (Photokina), they explained that that is an important factor for their work.
And I am seeing exactly that in my prints for decades.
This effect can also be very easily demonstrated with a simple test:
We take a reletively grainy film like Kentmere 400 or Fomapan 400 in 35mm format: We first make a small print of e.g. 13x18 centimeter (about 5x7"). We will have very good quality, very fine grain and fine tonal values, fine tonal gradations.
And then we make a much bigger print, 50x60cm (16x20"): The grain is very coarse and visible, and especially in even areas, like the sky, or other homogenous areas like parts of buildings, e.g., the "empty space" between the grain clusters become visible.
Because of the huge magnification the empty space between grains / grain clusters is very heavily "stretched".
No silver-halide crystals anymore (related to the print size) in some areas because of the huge magnification = no information recording possible = negative effect on recording of tonal gradation / values.
I can confirm that.
As I have had the great luck and privilege to visit 5 different film manufacturers, and talk there also with the emulsion chemists: Finer grain generally has a positive effect on recording grey tones and tonal gradations / tonal values in a more precise way. Finer graded / phased.
The technical background is that there are more silver-halide crystals per unit of area. That generally enhances the capability to render fine(r) or subtle tonal gradations, as more information can be recorded.
The same effect is working when we are using bigger formats: We all know of the general advantages concerning tonality bigger formats offer: Because for the final, given print size a bigger format needs less magnification. So in comparison to the smaller format, and looking at the same print size for both the smaller and the bigger format, the bigger format with less magnification has more silver-halide crystals per unit of area in relation to that print size. Which enhances rendering of tonal gradations.
Everyone who works with different formats knows this effect.
This effect can also be very easily demonstrated with a simple test:
We take a reletively grainy film like Kentmere 400 or Fomapan 400 in 35mm format: We first make a small print of e.g. 13x18 centimeter (about 5x7"). We will have very good quality, very fine grain and fine tonal values, fine tonal gradations.
And then we make a much bigger print, 50x60cm (16x20"): The grain is very coarse and visible, and especially in even areas, like the sky, or other homogenous areas like parts of buildings, e.g., the "empty space" between the grain clusters become visible.
Because of the huge magnification the empty space between grains / grain clusters is very heavily "stretched".
No silver-halide crystals anymore (related to the print size) in some areas because of the huge magnification = no information recording possible = negative effect on recording of tonal gradation / values.
In German fine-art printers use the term "die Flächen reißen auf". Well, my English translation is probably bad: "The areas / surfaces are ripped / torn open."
this is a very good description of the problem, which can be seen as well if we go to extreme scan resolutions (20'000ppi+).
at increasing resolution, smooth surfaces become grainy (obviously).
if we keep increasing the resolution, the grain starts to become cloudy, with empty areas between the grain clusters.
if we further increase resolution, even the grain clusters start to separate and we get a lot of black dots and empty film in between.
at this level, the film basically is very similar to a halftone pattern effect ( https://en.wikipedia.org/wiki/Halftone ).
All I can say is that there is a very novel use of the term, "tonality" going on here which has little resemblance to customary usage.
And Niko - how many engineers and chemists actually show up at trade fairs? Those are salesmen kinds of venues, who might or might not know what they are talking about.
Can I just throw this link into the mix ?
It's fascinating, I've been looking through it all afternoon.
To save time figuring it out, the two pictures default to TMax developer first, but you can click the tabs at the top on one or other of them, to do comparisons.
I spent a lot of time at Photokina in 1998 and can confirm that it has both breadth and depth of interest. I remember taking several visits to the Bergger stand, looking at the superb prints from 5x7" negs that they were showing. Shame that most of those products have now disappeared. However I think that the one that impressed me most was from FP4+ printed on the Bergger paper.
I AM a "fine art" printer, Niko, and am not ashamed to place my own prints side by side besides those of anyone in the world, living or dead, at least as far as b&w silver gelatin and color prints are concerned (I don't do UV processes). Been there, done that. I can legitimately state that I am a master of tonality. And I use all kinds of films just like an artist might choose between different kinds of pigment or painting surfaces to achieve a specific look. Don't tell me which genre a particular film applies to, and which it does not. If 35mm Delta 3200 is appropriate to the image, that is what I choose; if it's TMax 8x10 sheet film applies, then I use that. One's own set of eyes is the ultimate arbiter of all this - a WAY more important factor than mere grain structure, which I am in fact nitpicky about, far more than most, but only in a secondary manner.
I have a significant arsenal of expensive masking gear and specialized densitometers on hand if I need it, to very precisely controls repro values, including very fine nuances of microtonality and grain appearance. I have the finest of enlargers and enlarging lenses. But in the end, what the print actually looks like determines everything.
And I AM speaking about gray scale nuances top to bottom. But a whole lot more goes into the impression of tonality than that. I left the Zone System behind in kindergarten decades ago. And I have even worked side by side with an optical engineers who was himself a lousy photographer! Lets put some things in perspective. Here we are in fact talking technical details, but that not the end game. And one doesn't necessarily improve that by making loose generic statements about film grain in relation to tonality. You must think that every camera image taken prior to 1980 lacked good tonality. But some of the best I've even seen came from the 19th Century!
And which did you like best?
On that selection, it's tough to split it between D76 1+1 and TMax 1+4 , if you want a linear curve. Very impressive actually.
However in practice I have used Pyro PMK since '98 with FP4+
I recently tried WD2H ( John Wimberley ) , because that's what he used almost exclusively with FP4+ for years in LF, however I couldn't get it to give the required neg density .. so far ... ( see a thread on LF Photography forum ) .
If you look through all of the films and all of the developer combinations, it's clear that TMax comes out best overall on conventional measures like straight response, limited toe, film speed and grain. With HP5+ for instance, it looks significantly better than XTol if you want good highlight separation.
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