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Jetsam1 · 05-12-2010, 03:13 AM

Thanks everyone. I've just pulled the trigger and have been impressed with the photos some of you have been putting up. Easily good enough for me as I'm very much still finding my way around the film SLR cameras!

Cheers!

GeneV · 05-12-2010, 05:59 AM

Originally posted by goddo31

Gene - thanks for the explanation, I really had no idea it could work like that... Once I exposed some BW400CN at iso1600, but I asked the pro-lab to push it to 1600. The whole roll was exposed for 1600 anyway.

I have also experienced problems with some slight colour tinges, in prints from the 1-hour photo places.

I've never pushed a C41 B&W, even when I was processing it myself. I would be curious what happens. I was never all that thrilled with the look of ISO 1600 XP1, so it might have been an improvement.

Nesster · 05-12-2010, 06:22 AM

Although, this multi-ISO behavior is doable with real b&w film as well - Kodak e.g. doesn't specifiy a different developing time with tri-x at ei 800, and I'm sure ei 1600 within a roll exposed at a slower ei would come out contrastier and grainier, especially with scans.

The solution to mini-lab tones: a) if you always get prints, get to know the operator, they can desaturate the scans and prints for you b) if you get scans only, you can desaturate them yourself.

GeneV · 05-12-2010, 08:03 AM - **1 Like**

Originally posted by Nesster

Although, this multi-ISO behavior is doable with real b&w film as well - Kodak e.g. doesn't specifiy a different developing time with tri-x at ei 800, and I'm sure ei 1600 within a roll exposed at a slower ei would come out contrastier and grainier, especially with scans.

The solution to mini-lab tones: a) if you always get prints, get to know the operator, they can desaturate the scans and prints for you b) if you get scans only, you can desaturate them yourself.

That is an interesting point. Scanning allows all kinds of compensation.

BillM · 05-12-2010, 09:02 AM

Hi Everyone,
In reading this thread and trying to remember stuff from 30 years ago
my memory is more than just a little clouded(depletion not just a photographic
phenom). I seem to remember kodak including information for pushing
100 Tri-x Pan not just by processing time but also temperature. Could
swear I read this on data sheet that was included with each roll.

Blue · 05-12-2010, 09:07 AM

I have used it for several years, especially in situations where I want to use the local c41 lab.

goddo31 · 05-12-2010, 06:52 PM

Originally posted by GeneV

I've never pushed a C41 B&W, even when I was processing it myself. I would be curious what happens. I was never all that thrilled with the look of ISO 1600 XP1, so it might have been an improvement.

Gene, here is a sample of the BW400CN pushed to 1600:

Heaviest grain I have ever got, so far. What do you think?

GeneV · 05-12-2010, 08:13 PM

Originally posted by goddo31

Gene, here is a sample of the BW400CN pushed to 1600:

Heaviest grain I have ever got, so far. What do you think?

Nice shot.

Actually the grain is pretty similar to what I remember from XP1 at 1600 without pushing. It may not be as contrasty, though.

05-12-2010, 09:02 AM	#20
BillM Veteran Member Join Date: Jan 2010 Location: Ferguson, Mo. Photos: Gallery Posts: 1,348	Pushing Tri-X pan Hi Everyone, In reading this thread and trying to remember stuff from 30 years ago my memory is more than just a little clouded(depletion not just a photographic phenom). I seem to remember kodak including information for pushing 100 Tri-x Pan not just by processing time but also temperature. Could swear I read this on data sheet that was included with each roll.

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05-12-2010, 03:13 AM	#16
Jetsam1 Forum Member Join Date: Jan 2010 Posts: 67 Original Poster	Thanks everyone. I've just pulled the trigger and have been impressed with the photos some of you have been putting up. Easily good enough for me as I'm very much still finding my way around the film SLR cameras! Cheers!

05-12-2010, 05:59 AM	#17
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by goddo31 Gene - thanks for the explanation, I really had no idea it could work like that... Once I exposed some BW400CN at iso1600, but I asked the pro-lab to push it to 1600. The whole roll was exposed for 1600 anyway. I have also experienced problems with some slight colour tinges, in prints from the 1-hour photo places. I've never pushed a C41 B&W, even when I was processing it myself. I would be curious what happens. I was never all that thrilled with the look of ISO 1600 XP1, so it might have been an improvement.

05-12-2010, 06:22 AM	#18
Nesster Veteran Member Join Date: Oct 2006 Location: NJ USA Photos: Gallery Posts: 13,072	Although, this multi-ISO behavior is doable with real b&w film as well - Kodak e.g. doesn't specifiy a different developing time with tri-x at ei 800, and I'm sure ei 1600 within a roll exposed at a slower ei would come out contrastier and grainier, especially with scans. The solution to mini-lab tones: a) if you always get prints, get to know the operator, they can desaturate the scans and prints for you b) if you get scans only, you can desaturate them yourself.

05-12-2010, 08:03 AM - 1 Like	#19
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by Nesster Although, this multi-ISO behavior is doable with real b&w film as well - Kodak e.g. doesn't specifiy a different developing time with tri-x at ei 800, and I'm sure ei 1600 within a roll exposed at a slower ei would come out contrastier and grainier, especially with scans. The solution to mini-lab tones: a) if you always get prints, get to know the operator, they can desaturate the scans and prints for you b) if you get scans only, you can desaturate them yourself. That is an interesting point. Scanning allows all kinds of compensation.

05-12-2010, 09:07 AM	#21
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	I have used it for several years, especially in situations where I want to use the local c41 lab.

05-12-2010, 06:52 PM	#22
goddo31 Veteran Member Join Date: Feb 2009 Location: Perth, Western Australia Photos: Gallery \| Albums Posts: 2,576	Originally posted by GeneV I've never pushed a C41 B&W, even when I was processing it myself. I would be curious what happens. I was never all that thrilled with the look of ISO 1600 XP1, so it might have been an improvement. Gene, here is a sample of the BW400CN pushed to 1600: Heaviest grain I have ever got, so far. What do you think?

05-12-2010, 08:13 PM	#23
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by goddo31 Gene, here is a sample of the BW400CN pushed to 1600: Heaviest grain I have ever got, so far. What do you think? Nice shot. Actually the grain is pretty similar to what I remember from XP1 at 1600 without pushing. It may not be as contrasty, though.

Kodak BW400CN question

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