March 4, 2010

Caffenol-C-M details


1. picture: Fomapan100, EI 400, whole image
2. picture: EI 400, crop 10x10 mm negative size
3. picture: EI 100, crop 10x10 mm negative size
4. picture: TMax100, EI 200, crop 10x10mm negative size

Click on the images for bigger size.

All images developed in Caffenol-C-M as described in former post. On my desktop screen, the 10x10mm crops represent whole images of 1.30x1.30 meters print size for 120 film and still 50x80 cm for 35mm film! Caffenol-C-M enhances film speed without changing anything. Compare the EI 100 and EI400 images, both from the same roll, there is almost no loss. Just a tiny little bit more grain.

The last image is a 10x10 mm crop from the TMax100 exposed at EI 200 ASA. Almost no grain, extraordinary rendering from highlights to shadows, usable exposure range from 25 to 800 ASA. The subject had a contrast range of 9 stops. All in all this combo can handle a contrast range of 13 - 14 stops! And you need an extremely good lens to scratch the resolution limits. That's what I call "state -of-the-art".

Images 1-3 made by a 65 years old VoigtlƤnder Bessa 66 with uncoated 3.5/75 Skopar, image 4 made by Pentacon Six with 2.8/80 Carl-Zeiss-Jena Biometar and z-ring.

Stay tuned. More to come ...... Reinhold

14 comments:

Anonymous said...

So this means that I can just use the TMax100 as if it were an ISo 400 (or even 800) film and get good or at least decent results? No pushing needed?

imagesfrugales said...

Exactly!

Anonymous said...

so when you say the same roll you mean one picture was taking at 100iso and the next picture taken at 400iso then developed in teh same tank at the same time and created a good negative in both cases??

imagesfrugales said...

That's what I mean.

Anonymous said...

For my tank 12oz is it right?

Caffe - 14 grammi
Soda - 18 grammi
Vit C - 5 grammi

imagesfrugales said...

1 oz = 30 ml, 12 oz = 360 ml
you need 0.36x the amount of 1 litre.
coffee: 14.4 gramms, soda: 19.4 gramms, Vit-C: 5.8 gramms
So you are very close. I would take 15, 20, 6

Anonymous said...

Thanks for the response proportions for my tank to 12 ounces.
What do you think of using borax instead of soda?
Borax is a milder alkali than soda so as to contain the grain
and in what proportions add
sorry for my English

imagesfrugales said...

I have no experiance with borax, sorry. Nothing to worry about your english, I don't think that mine is better ;-)

Anonymous said...

I developed in a Rondinax 60 (150ml 6coffe 8soda 2,5vitamina C) a roll 120 Kodak Ektacolor Gold 160 professional expired 5 years for 15 minutes but came completely black. No images. Can you tell me why?
thanks

imagesfrugales said...

Any film coming completely black has been exposed to light completely, independent from developer.

If you mean completely transparent, I don't know and I don't recommend using expired films. In case of failure you never know why.

I can't tell anything about experimental developing. My approach is rational, I want reproducable results.

Your recipe is cryptic, guess why? Gramms, tons, cups, teaspoons?

Anonymous said...

know how to remove the veil and fog in the development with caffenol?

imagesfrugales said...

If I knew you also would. I don't hide any "secrets". But there's no reason to be concerned about some fog. It's normal and doesn't disturb. On the contrary I estimate it's the reason for the extraordinary shadow rendering of Caffenol-C-M. But with faster films (400 ASA and +) it becomes a problem, I can't recommend so far.

Trevor Walsh said...

Reinhold, are these film scans or prints that have been scanned? If it is scanned film, how do you get them so sharp? Mine aren't nearly that sharp, but I think the negatives are.

Thanks,
Trevor

imagesfrugales said...

These are film scans made with Canoscan 8800F and Vuescan. A little bit pp with Gimp, nothing spectacular.