I have a wooden ruler that has the bellows extension factors of my two lenses written on it. Hold one end of the ruler on the lens board, and read off what factor is needed at the film plane.
I've attached a copy of my record. However, I don't have reciprosity numbers for FP4, it's Delta 100.
Hi JOSarff !
I can't open the Exposure.doc file. I gave a blank page.
I wonder if it was made on a Mac ?
Do you have any means to convert it into a PDF or anything else than Word ?
P.S. it may be just me and my computer ;-)
JOSaff - Thanks for sharing and posting, but I also can not open the attachment.
Here's my table to determine bellows factor by magnification. It's small, so I have them taped to the backs of all my LF cameras, on my light meter, and in my notebook. To determine magnification just estimate the width of the scene at the subject position and compare to the width of the format, and then use the table to find the bellows exposure factor--works for any format with any camera. For instance, if you're taking a headshot with an 8x10" camera, the distance from one shoulder to the other will be around 24", and the format in portrait mode is 8" wide, so the magnification factor will be 1:3, and you'll need about 2/3 to 1 stop additional exposure. For the same image on 4x5" the magnification factor will be 1:6, so you would need about 1/3 to 1/2 stop additional exposure. If you want to be more precise for higher magnification factors, you can put a ruler in the scene.
Having had an ambulance ride a couple of years ago I learned the benefit of carrying a sheet of paper in my wallet and pack, identifying myself, an emergency contact, my doctor, allergies to any medications, the medications I am currently taking. Each hospital station from the emergency room on that information like that allowed them to get to the problem quickly and avoid additional ones. The only difficulty I had was that each station wanted to keep the sheet of paper rather than make a copy and return the original. Had I been unconscious only the first station would have benefited.
A policeman friend has since told me that they are trained to look at cell phone databases searching for emergency contacts. Someone invented the concept of listing these with the letters ICE in front of the name. ICE = In Case of Emergency. Most people just list the names and the emergency people can't tell your wife from your pharmacist.
Hope this saves someone some time when seconds count.
I tried saving the file as a .txt and .pdf so lets try again.
Thanks - both of these opened up fine - I do like your idea of putting reference information on the back side of the exposure record.