jimtrue.com : school : CJT1221 : 2003-06-13: Photo Assignment #2
Posted by Jim True on June 13, 2003 6:23 AM. Last Updated October 22, 2006 9:23 PM
Disclaimer for all material noted here is at the bottom of this web page.
We're often asking in forensic photography the camera to do what it's not actually designed to do. The camera has no concept of what you're trying to perform with the camera, which is why you need to know what you're doing.
It doesn't know anything you trying to get contrast of blood on a green car.
500 ml fits a container. Fixer, Developer, Stop Bath.
Contact Sheet
Same as a proof sheet. Nothing more than your strips of negatives laid down edge to edge on a piece of photographic paper with a piece of glass over them to lay them flat.
Enlarger is set wide open so it produces the same amount of light for all the pictures. Creates one sheet of tiny photographs the size of your negatives.
When doing black & white, always do a contact sheet. You won't print all your shots. File your negatives and contact sheets together so you always have a reference.
Next question: What is your correct exposure to print this negative? F8 at 10 seconds, should give you a fairly good quality print. If you took a fairly good quality photo.
If you took all your photographs metered off the grey background
Test Print
Test Strip: 8 x 10 photo paper
Set the Lens to F8
Set the timer for 5 seconds.
Make a 5 second exposure of this print.
Then take a piece of cardboard to cover the entire photo except for a small strip and take another 5 second exposure. move down another inch and another 5 second exposure.
Once developed, the bands will be for the different exposures. Somewhere within those bands is the proper development time.
60 to 125 is doubling the amount of light.
F8 to F4 doubling the amount of light.
Timer is the shutter; enlarger lens is the iris.
DO NOT MIX UP YOUR DEVELOPER AND FIXER!!!!
Disclaimer: These are MY notes taken from classroom lectures while I'm in the classroom. While I'm perfectly happy to share my notes with my classmates and I know I take very good notes, you should still make every effort to attend the class and TAKE YOUR OWN NOTES. I will not transcribe everything the instructor says in the classroom, and I will NEVER post pre-exam reviews. My notes will not replace the value of actually attending class and taking your own class notes.I also cannot attest to their accuracy, other than they are what was provided in the lecture; you should not reference my notes as "expert opionion" by any means, and if you notice an error or omission, please do me the favor of e-mailing me with the correction and I will re-post my notes. End of Disclaimer.