push/pull colour neg film?
Was chatting away with Rob Studdert today, and together we raised an interesting issue - in light of the postings about pushing/pulling film these past few days, and their tolerance of standard processing etc, we were wondering if any of you had achieved successes in the same way by push/pulling COLOUR NEGATIVE film? ie. for eg. rating an ISO 100 speed film as 400 but processing it as normal ie as an ISO 100? let the discussion begin vbg tan.
Re: push/pull colour neg film?
on 16.12.03 12:18, Tanya Mayer Photography at [EMAIL PROTECTED] wrote: Was chatting away with Rob Studdert today, and together we raised an interesting issue - in light of the postings about pushing/pulling film these past few days, and their tolerance of standard processing etc, we were wondering if any of you had achieved successes in the same way by push/pulling COLOUR NEGATIVE film? ie. for eg. rating an ISO 100 speed film as 400 but processing it as normal ie as an ISO 100? I think this can be quite easy done with almost every film developed in C-41 process. AFAIR Kodak allows to expose T400CN bw C41 film at iso100-1600 and still have good results. Someone has mentioned onse on photo.net, that he had better grain, when exposed T400CN at iso100. More problems with colour film could be related to colour shift when exposed at non-standard sensitivities, but theoretically this could be corrected in mini-lab. let the discussion begin vbg Was I first? ;-) -- Best Regards Sylwek
Re: push/pull colour neg film?
Was I first? ;-) YUP! Congrats! lol... I have never even thought to push/pull t400cn and it is my favourite film! I am going to try it next roll that I put through, can't wait to see the results Although, I must say, I have always been happy with the grain that it produces... and to quote the famous trevor, of grafton...hooroo! tan. - Original Message - From: Sylwek [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, December 16, 2003 9:28 PM Subject: Re: push/pull colour neg film? on 16.12.03 12:18, Tanya Mayer Photography at [EMAIL PROTECTED] wrote: Was chatting away with Rob Studdert today, and together we raised an interesting issue - in light of the postings about pushing/pulling film these past few days, and their tolerance of standard processing etc, we were wondering if any of you had achieved successes in the same way by push/pulling COLOUR NEGATIVE film? ie. for eg. rating an ISO 100 speed film as 400 but processing it as normal ie as an ISO 100? I think this can be quite easy done with almost every film developed in C-41 process. AFAIR Kodak allows to expose T400CN bw C41 film at iso100-1600 and still have good results. Someone has mentioned onse on photo.net, that he had better grain, when exposed T400CN at iso100. More problems with colour film could be related to colour shift when exposed at non-standard sensitivities, but theoretically this could be corrected in mini-lab. let the discussion begin vbg Was I first? ;-) -- Best Regards Sylwek
RE: push/pull colour neg film?
-Original Message- From: Tanya Mayer Photography [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 16, 2003 1:18 PM To: [EMAIL PROTECTED] Subject: push/pull colour neg film? Was chatting away with Rob Studdert today, and together we raised an interesting issue - in light of the postings about pushing/pulling film these past few days, and their tolerance of standard processing etc, we were wondering if any of you had achieved successes in the same way by push/pulling COLOUR NEGATIVE film? ie. for eg. rating an ISO 100 speed film as 400 but processing it as normal ie as an ISO 100? If processing a negative ISO 100 film as an ISO 100 film (not pushing nor pulling the process) I wouldn't expose it as ISO 400. Speeds between ISO 50 and ISO 200 would be quite ok. While color negative film does have pretty wide exposure latitude I would not go to the extreme ends to start from. Being a slide exposer I only use one type of negative film, the Kodak Portra 160 NC... Nice tan... Antti-Pekka --- Antti-Pekka Virjonen Computec Oy, Turku Finland Gsm: +358-500-789 753 www.computec.fi * www.estera.fi
Re: push/pull colour neg film?
Tanya wrote: I have never even thought to push/pull t400cn and it is my favourite film! I am going to try it next roll that I put through, can't wait to see the results Although, I must say, I have always been happy with the grain that it produces... No need to alter processing times w/ TMaxCN - You can shoot it (IMHO) from 200 to 800 and get great results w/ standard C-41 processing. It's called exposure latitude. Bill - Bill D. Casselberry ; Photography on the Oregon Coast http://www.orednet.org/~bcasselb [EMAIL PROTECTED] -
Re: push/pull colour neg film?
At the Viking Ship Museum in Oslo last September I shot several rolls of NPZ 800. The wood of the ships is dark and the display is dark, lit mainly by side windows. So I shot the film at 1600 and had it processed normally. In other words, it was a one-stop underexposure. The result was a great increase in grain in parts of the ships with uniform tones. A few days later, in the historical museum in Copenhagen, I did the same thing with Fuji Press 800. The result was about the same. I also shot Provia 400F at 1600 and had it processed with a two-stop push. The grain results were comparable. I did get acceptable images this way, some even rather nice. One or two are nice enough that you might see them on PUG eventually. The main drawback is that, once scanned, I cannot sharpen them to print large enlargements. The grain gets sharpened too much. I can reduce the grain with Digital GEM, but then sharpening just puts it right back. Joe
Re: push/pull colour neg film?
- Original Message - According to Kodak, who invented the process, C41 is a process to completion process at it's rated time/temperature. Under developing (pull processing) won't allow the mask to proces completely, which will lead to cross curves and impossible colour balancing problems. Over developing (push processing) will over develop the mask layer, causing cross curves and impossible colour balancing problems. Any potential gain from over developing is eliminated by the increase in mask density. There is, in fact, very little speed gain from push processing film. About all that happens is that contrast increases. There is generally remendous speed loss from pull processing, as well as loss of contrast. William Robb Actually now that i read your reply Bill,i had my example backwords.I shot 160 film at 400 not the other way around.But they still came out well. FWIW.:-) Dave
Vs: push/pull colour neg film?
Actually this is not pushing or pulling - pushing is done with underexposure + increased development time, pulling by overexposure + decreased development - but with with current machinery this is not feasible for colour negative films. Colour negative films have incredible latitude towards overexposure and slight overexposure usually gives better results. All the best! Raimo Personal photography homepage at http://www.uusikaupunki.fi/~raikorho -Alkuperäinen viesti- Lähettäjä: Tanya Mayer Photography [EMAIL PROTECTED] Vastaanottaja: [EMAIL PROTECTED] [EMAIL PROTECTED] Päivä: 16. joulukuuta 2003 13:21 Aihe: push/pull colour neg film? Was chatting away with Rob Studdert today, and together we raised an interesting issue - in light of the postings about pushing/pulling film these past few days, and their tolerance of standard processing etc, we were wondering if any of you had achieved successes in the same way by push/pulling COLOUR NEGATIVE film? ie. for eg. rating an ISO 100 speed film as 400 but processing it as normal ie as an ISO 100? let the discussion begin vbg tan.
Re: Vs: push/pull colour neg film?
On Tue, 16 Dec 2003, Raimo Korhonen wrote: Actually this is not pushing or pulling - pushing is done with underexposure + increased development time, pulling by overexposure + decreased development So, assuming that we are talking about BW film, if I shoot a 400 at 800 should I advise the lab to push it (and pay a fee) or is what I did just exploiting latitude and needs no special care? Thanks, Kostas
Vs: Vs: push/pull colour neg film?
With BW film development time (or temperature) should be increased and labs usually charge for this - if you find a lab that will do it in the first place. All the best! Raimo Personal photography homepage at http://www.uusikaupunki.fi/~raikorho -Alkuperäinen viesti- Lähettäjä: Kostas Kavoussanakis [EMAIL PROTECTED] Vastaanottaja: [EMAIL PROTECTED] [EMAIL PROTECTED] Päivä: 16. joulukuuta 2003 19:26 Aihe: Re: Vs: push/pull colour neg film? On Tue, 16 Dec 2003, Raimo Korhonen wrote: Actually this is not pushing or pulling - pushing is done with underexposure + increased development time, pulling by overexposure + decreased development So, assuming that we are talking about BW film, if I shoot a 400 at 800 should I advise the lab to push it (and pay a fee) or is what I did just exploiting latitude and needs no special care? Thanks, Kostas
Re: push/pull colour neg film?
- Original Message - From: Raimo Korhonen Subject: Vs: push/pull colour neg film? Actually this is not pushing or pulling - pushing is done with underexposure + increased development time, pulling by overexposure + decreased development - but with with current machinery this is not feasible for colour negative films. Colour negative films have incredible latitude towards overexposure and slight overexposure usually gives better results. Every C-41 machine I have used during my short career as a lab tech has had the capability to shut the drive off with film in it, and has had long enough racks to allow a 24 exposure roll to sit completely submerged in the developer. Of course, if you shoot 36 exposure rolls you are SOOL. Push or pull processing is a function of development, and is a separate entity from exposure, though generally, one only happens because of the other. William Robb
