Jonni Allen
Well-Known Member
I have read that you can shoot this film at ISO 1600. Hows that possible using a RB67 or have i read something wrong and its to do with the developing?
Thanks in advance.
Thanks in advance.
Ilford Delta 3200
- Thread starter Jonni Allen
- Start date
Brian Moore
Moderator
Jonni,...I have read that Delta 3200 isn't a true 3200 speed film. It's actually 1000 ISO (so I've read) with a very wide exposure latitude.
Jonni Allen
Well-Known Member
Thanks Brian. So what ISO do i set my settings at. Do i set my meter to the desired ISO.
Brian Moore
Moderator
I'd go with my desired ISO.
Jonni Allen
Well-Known Member
Thanks Brian. So if i use settings for say ISO 1000 in camera do i develop it for ISO 1000 or 3200?
Brian Moore
Moderator
If it were me I'd probably just have it developed normally, Jonni. In other words, I'd meter and shoot it at 1000 (or whatever speed I preferred) then take the film to the camera shop and drop it off for development with no special instructions. But that's easy for me to say since I generally just shoot snapshots I wouldn't be too bothered.
Your work is different than mine, though, and I believe precision is likely a bigger factor for you than for me. So I went to the Ilford fact sheet for the 3200 film. (See link below.) The fact sheet provides development times for shooting at different ISOs. You'll see in the chart that development times are shorter when a lower ISO is used.
So, given the above factors, if I shot this film at 1000 ISO, I would tell the people developing it that I had done so, and I would ask that they "pull" the film in development.
http://www.ilfordphoto.com/Webfiles/201071394723115.pdf
Your work is different than mine, though, and I believe precision is likely a bigger factor for you than for me. So I went to the Ilford fact sheet for the 3200 film. (See link below.) The fact sheet provides development times for shooting at different ISOs. You'll see in the chart that development times are shorter when a lower ISO is used.
So, given the above factors, if I shot this film at 1000 ISO, I would tell the people developing it that I had done so, and I would ask that they "pull" the film in development.
http://www.ilfordphoto.com/Webfiles/201071394723115.pdf
Ian Grant
Well-Known Member
Best to run a test roll through your camera and establish the ideal dev time & EI for yourself.
At one time both Kodak and Fuji made special high speed E6 films designed to give their best results at 1600 EI but in fact their true base speed was 40 EI and they needed push processing, at 400EI they were lifeless and low contrast. Their emulsions were optimised for push processing and the Ilford Delta 3200 works in the same way.
Most people aren't aware that XP2 Plus is excellent push processed in C41 chemistry. I used a lot of XP1 push processed to Ilford's recommendations in their data-sheets shooting Rock concerts with excellent results. However labs didn't like XP1 because it used non standard (longer) C41 development times and that caused issue for customers, I processed my own so it wasn't a problem.
So when Ilford released XP2 it was an emulsion designed for the shorter standard C41 development time that all labs use but they dropped all mention of push processing. I just carried on pushing the new emulsion and it was still excellent. I had a discussion about this on a business trip to Mobberly with a senior research chemist (mid 1980's) and they conformed XP2 could be push processes but that apart prom Pro labs the average High Street labs didn't have the capability which had in fact been the problem with XP1
Ian
At one time both Kodak and Fuji made special high speed E6 films designed to give their best results at 1600 EI but in fact their true base speed was 40 EI and they needed push processing, at 400EI they were lifeless and low contrast. Their emulsions were optimised for push processing and the Ilford Delta 3200 works in the same way.
Most people aren't aware that XP2 Plus is excellent push processed in C41 chemistry. I used a lot of XP1 push processed to Ilford's recommendations in their data-sheets shooting Rock concerts with excellent results. However labs didn't like XP1 because it used non standard (longer) C41 development times and that caused issue for customers, I processed my own so it wasn't a problem.
So when Ilford released XP2 it was an emulsion designed for the shorter standard C41 development time that all labs use but they dropped all mention of push processing. I just carried on pushing the new emulsion and it was still excellent. I had a discussion about this on a business trip to Mobberly with a senior research chemist (mid 1980's) and they conformed XP2 could be push processes but that apart prom Pro labs the average High Street labs didn't have the capability which had in fact been the problem with XP1
Ian
Hamish Gill
Tech Support (and Marketing)
In simple terms ...
Set the light meter to 1600 iso
then when you processm, "pull" process the film using development times for delta 3200 shot at EI1600
you can find the relevent times per chemical here http://www.digitaltruth.com/devchart.php
eg using dd/dd-x http://www.digitaltruth.com/devchart.php?Film=Delta+3200&Developer=Ilfotec+DD&mdc=Search&TempUnits=C
You can see that with a 1+9 dilution at 20 degrees to pull delta to 1600 you would dev for 20mins (14th row)
"EI" stands for Exposure Index...
When reading about this stuff you will see people referring to shooting film at "box speed" ie the speed the manufacturer rate the film at or eg "EI1600" meaning when shooting the film the meter was set to that iso
Set the light meter to 1600 iso
then when you processm, "pull" process the film using development times for delta 3200 shot at EI1600
you can find the relevent times per chemical here http://www.digitaltruth.com/devchart.php
eg using dd/dd-x http://www.digitaltruth.com/devchart.php?Film=Delta+3200&Developer=Ilfotec+DD&mdc=Search&TempUnits=C
You can see that with a 1+9 dilution at 20 degrees to pull delta to 1600 you would dev for 20mins (14th row)
"EI" stands for Exposure Index...
When reading about this stuff you will see people referring to shooting film at "box speed" ie the speed the manufacturer rate the film at or eg "EI1600" meaning when shooting the film the meter was set to that iso
Brian Moore
Moderator
Maybe I misunderstood, @Hamish Gill, but I assumed that Jonni would be having his film developed by a lab.
Hamish Gill
Tech Support (and Marketing)
Perhaps... A bit of background can't hurt though...
Pete Askew
Admin
I'd go with Hamish's recommendation for Delta 3200. The lab will be using B&W chemistry and will have no problem pull-processing it if you expose at 1600 ISO. Once you have have established your technique for film you could then do some tests you establish your 'personal' EI if you either process your own film of have a good relationship with a particular lab.
Depending on the look you are after, HP5 can be pushed to ISO 1600. It depends on how 'gritty' a look you are after.
Depending on the look you are after, HP5 can be pushed to ISO 1600. It depends on how 'gritty' a look you are after.
