Search found 878 matches

by Ornello
Fri Oct 23, 2015 2:46 pm
Forum: The Digitaltruth Forum
Topic: How to properly make PaRodinal
Replies: 30
Views: 110234

Re: How to properly make PaRodinal

Well, pan f/rodinal combo was marginally successful; in other words, not so good. thinking about trying another approach to the pan f contrast "problem". went through my developer files looking for a formula for a compensating developer. came across one for xr-1. claims to have some compe...
by Ornello
Thu Oct 15, 2015 8:09 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

pirateoversixty wrote:how does this translate to c-41 black and white film since the grain structure is different?

I don't understand the question.
by Ornello
Wed Oct 14, 2015 8:51 am
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

I guess I have to sign off on this thread. Nothing more to say. Interesting link on Edgerton. Jim The faster the film, the greater the size of the AgBr crystals, and the greater the range of sizes. Slow films have only very tiny crystals, which develop quickly (because they are small) and all about...
by Ornello
Thu Oct 01, 2015 8:49 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

Digitaltruth speaks the truth. A "correct" result exists only in the mind of the person that is satisfied with the results of his efforts. Some prefer a contrastier result than another would consider "correct". Trying to push everybody to aspire to one standard would certainly m...
by Ornello
Wed Sep 30, 2015 8:19 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

A lot of manufacturers do list times for push processing, but Ornello is correct in stating that every film has an optimal speed at which it should be exposed to get the fullest tonal range and most accurate contrast. Some films have more latitude than others, allowing them to be exposed within a w...
by Ornello
Mon Sep 28, 2015 1:08 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

To repeat: Why do the makers give push-processing times? I have no quarrel with your statements. As I said, maybe the OP is looking for a usable neg rather than one that has "shadow detail" and a full range of "beautiful, full tones." Maybe he is looking for a compromise. I don'...
by Ornello
Tue Sep 22, 2015 9:26 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

Ornello: If push-processing were to lead to total mish-mash, why would the manufacturer lead a photographer on to totally ruin his film? Is this a diabolical plot by the manufacturer to put itself out of business, or do they see possibilities that you don't? I understand what you are trying to say;...
by Ornello
Wed Sep 16, 2015 8:22 pm
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

Ornello: Maybe we should look at what the OP needs, not at what the rules are...... If what he needs is a usable neg that would otherwise be trashed, the "push" is his answer. The shadow detail he will lose may not be important if the subject of the picture is reasonably well exposed. Per...
by Ornello
Tue Aug 18, 2015 10:40 am
Forum: The Digitaltruth Forum
Topic: Pushing Tri X - dev time masive dev
Replies: 15
Views: 45442

Re: Pushing Tri X - dev time masive dev

You cannot increase the sensitivity of film by 'pushing'. It's a waste of time to try. Underexposure cannot be remedied by overdevelopment. The sensitivity of film is determined at manufacture. Faster films have more latitude, and that can be confusing. They can be under-exposed a little more than s...
by Ornello
Mon Jul 27, 2015 9:00 pm
Forum: The Digitaltruth Forum
Topic: reuse of chemicals
Replies: 1
Views: 14683

Re: reuse of chemicals

Hello All Since i am starting developing 4x5 on paterson tanks (both color and B&W) , considering that for 4x5 processing the tank needs to be filled up ( 1 liter) i wonder if the reuse of chemicals (both for C41 and B&W) is calculated based on how many sheets of film i have developed or ho...
by Ornello
Mon Jun 29, 2015 7:06 pm
Forum: The Digitaltruth Forum
Topic: Bert Hardy's "Super soup" & Edwal 12
Replies: 1
Views: 14830

Re: Bert Hardy's "Super soup" & Edwal 12

There is actually very little that developers can do. Some give more speed, some give finer grain. The differences between the best and worst are not huge. Noticeable to the critical user, to be sure, but not huge. The amount of exposure and development is what matters most.
by Ornello
Sun Jun 28, 2015 7:45 pm
Forum: The Digitaltruth Forum
Topic: Increasing Exposure Latitude in B&W 35mm film
Replies: 28
Views: 75567

Re: Increasing Exposure Latitude in B&W 35mm film

You can use Rodinal, thousands of other photographer do. You can dilute it up to 1+300, but 1+50 to 1+100 are the most common. It can give you great negatives...if you know what you're doing. You can also use a staining developer like Pyrocat HD or WD2D. Yes, the negs come out stained. This stain h...
by Ornello
Thu Jun 25, 2015 8:54 am
Forum: The Digitaltruth Forum
Topic: Increasing Exposure Latitude in B&W 35mm film
Replies: 28
Views: 75567

Re: Increasing Exposure Latitude in B&W 35mm film

Note that it's not possible to change the latitude of film. It is, however, possible to make negatives easier to print.
by Ornello
Mon Jun 22, 2015 2:46 pm
Forum: The Digitaltruth Forum
Topic: Increasing Exposure Latitude in B&W 35mm film
Replies: 28
Views: 75567

Re: Increasing Exposure Latitude in B&W 35mm film

Barry Thorton was a fan of Ilford Perceptol which uses Metol as the only developing agent. When diluted 1+3, Perceptol will give the results that Ornello has already mentioned. Err towards the generous side with film exposure with this developer. Perceptol is similar to D23 in composition, I believ...