Jonathan,
Something to consider about that lens you have...it fits well with the "sunny 16" rule. Film rarely came in ISO's of 30, 60, 125 or 250, but in 25, 50 and 100. Therefore, a shutter that can be matched to you ISO fit the "sunny 16" rule much better than our more current shutter speed settings, for which we have to (almost) always approximate the setting to get close to the ISO. Fortunately, negative film has enough latitude to allow some fudging. However, transparency film doesn't have the latitude and requires finer precision. Therefore, you will want to have the lens' accuracy measured, if you wish to avoid a lot of frustration when shooting transparency.
Stephen
From: Jonathan Turner <pictures@xxxxxxxxxxxxxxxxxxx>
To: List for Photo/Imaging Educators - Professionals - Students <photoforum@xxxxxxxxxxxxxxxxxx>
Sent: Monday, March 31, 2014 1:31 AM
Subject: exposure issues
To: List for Photo/Imaging Educators - Professionals - Students <photoforum@xxxxxxxxxxxxxxxxxx>
Sent: Monday, March 31, 2014 1:31 AM
Subject: exposure issues
Hi,
I recently bought an old large format field camera that came with a lens
which is so old it has shutter speeds that don't correspond with my
light meter; it has 5th, 10th, 25th, 50th, 100th, 200th, instead of the
normal shutter speeds (8th, 15th, 30th, 60th etc.)
So my problem is trying to work out what the correct exposure should
be...working from my meter. I'm shooting colour negative, so I'm
guessing it can take a bit of latitude either way, but can't quite work
out if I should go with an exposure that is slightly over, or slightly
under what the meter says. For example, if my meter reading is F8/125th,
should I shoot at F8/100th, or F8/200th?
Any input appreciated.
Cheers,
Jonathan.
--
Jonathan Turner, Photographer e: pictures@xxxxxxxxxxxxxxxxxxx t: 07796
470573 w: www.jonathan-turner.com
