Call me an idiot...forgot ISO...

mps

Member
Joined
Sep 19, 2006
Messages
30
Location
Arkansas
Format
35mm
Okay, I feel really stupid here. I recently shot a couple rolls of HP5+. Well I shot one at 400 and the other at 1600.....and guess what, yes I forgot to mark the one exposed at 1600! Would it be best to process them both at 400? Any suggestions? And I feel even more stupid after writing this question! Thanks in advance!
 

JBrunner

Moderator
Moderator
Joined
Dec 14, 2005
Messages
7,429
Location
PNdub
Format
Medium Format
Which of the two rolls is most important? If they are equally important proccess the first roll for 1600, if you luck out, great, if not, its over two stops, not a total disaster, and you know what to do with the second, or vice versa(if you luck out, its 50/50). If the 400 is important, process one at 400, if you luck out, great, if not, you know what the second roll is, and you will have to take your lumps on the first.
 
Last edited by a moderator:

Richard Wasserman

Member
Joined
Mar 17, 2004
Messages
726
Location
Wilmette,Ill
Format
Multi Format
I don't really know what to suggest about processing the film, although JBrunner's question is a good one. Please don't feel too stupid, this is just one of the more popular mistakes to make. The entire list of errors is very, very long and growing.

Richard Wasserman
 

reellis67

Subscriber
Joined
Mar 10, 2005
Messages
1,885
Location
Central Flor
Format
4x5 Format
You could clip the first bit of film from one roll and develop it normaly to see if it is the 400 or 1600 roll. You will likely cut through a frame, but at least you would know for the rest of the roll...

- Randy
 

JBrunner

Moderator
Moderator
Joined
Dec 14, 2005
Messages
7,429
Location
PNdub
Format
Medium Format
mps said:
The one shot at 1600 but was hoping to be able to get prints from both.
Click to expand...

Then process one for 1600, and you should have a decent chance to pull prints from the 400 roll if you are unlucky, and thats the first roll you process. If you win, then you win, and if you lose, all is not lost. Underprocessing the 1600 would be the clear loser, because you can't print what's not there.
 

JBrunner

Moderator
Moderator
Joined
Dec 14, 2005
Messages
7,429
Location
PNdub
Format
Medium Format
reellis67 said:
You could clip the first bit of film from one roll and develop it normaly to see if it is the 400 or 1600 roll. You will likely cut through a frame, but at least you would know for the rest of the roll...

- Randy
Click to expand...

A good suggestion, that I didn't think of. (I don't think in roll film reality that much)
 

Dave Parker

Member
Joined
Aug 14, 2004
Messages
4,031
Format
Multi Format
A clip test is going to be your best bet, your most likely going to loose a frame or two off of each roll, but it is your best chance to figure out which roll was shot at what ISO.

Dave
 

kb244

Member
Joined
Dec 26, 2005
Messages
1,026
Location
Grand Rapids
Format
Multi Format
I wonder how catastropic it would be to develop both as 800?
 
OP
OP

mps

Member
Joined
Sep 19, 2006
Messages
30
Location
Arkansas
Format
35mm
kb244 said:
I wonder how catastropic it would be to develop both as 800?
Click to expand...

That was my first thought, processing the first roll at 800 and then going from there. My fear was if it was the 1600 roll then would it still be too underdeveloped to print from? Anyone have an experience with this?

But the suggestion of only processing the first few frames is the way to go......need not rush things....

Thanks for the help! Mistakes = learning...I hope it sticks!
 

kb244

Member
Joined
Dec 26, 2005
Messages
1,026
Location
Grand Rapids
Format
Multi Format

If you are an experience darkroom tech or whatever one would call it, and have never made a mistake. Then one can say you would not be very experienced lol. (that is to say you haven't done it long enough if you have not made even the simplest of errors, I think its true for most things)
 

Ole

Moderator
Moderator
Joined
Sep 9, 2002
Messages
9,245
Location
Bergen, Norway
Format
Large Format
I would do the same as I do when I've exposed a roll in wildly variable lighting conditions without a light meter:

Stand development in FX-2.

FX-2 gives a real speed increase of 1 to 1 1/2 stops (with FP4+, I expect about the same with HP5+), and the stand development helps to compress the high values so that they don't block up.
 
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…