PDA

View Full Version : Courtyard Tests



JoeVanCleave
09-20-2006, 11:58 PM
I had a compulsion to expose some paper negatives in my Polaroid Land 800, and also do some calibrations of 'film speed' (i.e. exposure index) using standard light metering methods.

This first shot was in bright sun. I rated the Arista grade 2 at EI = 2. The meter recommended EV10, so I set the lens of the Land 800 to "EV10", which is f8.8 @ 1/12s. In spite of the high contrast scene, it looks like the exposure is pretty right on. The meter is a Gossen Luna Pro F, using incident metering. Attached files http://f295.f295.org/uploads/patio001a_7105.jpg (http://f295.f295.org/uploads/patio001a_7105.jpg)

JoeVanCleave
09-21-2006, 12:02 AM
This second shot is under the shade of the patio umbrella. Again using an EI = 2 for the paper negative, the meter recommended EV8. Since the Land 800 doesn't have an automatic shutter speed that slow, I set the lens to the "EV17" setting, which equates to a f/35 aperture, and used a 6 second exposure using the "bulb" feature of the shutter. My Gossen says that 6 seconds at f/35 is EV8 for an EI = 2.

Again, it looks like the paper negative responds linearly to this scene, which gives me confidence that I can use the Gossen, set to EI = 2 for paper negatives, and the Land 800 should give me good exposures under a wide variety of light.

BTW, the book on the table is about Alfred Steiglitz, and the Gossen meter is also in the scene. Attached files http://f295.f295.org/uploads/patio003a_6126.jpg (http://f295.f295.org/uploads/patio003a_6126.jpg)

retroshooter
09-21-2006, 01:54 AM
funny that I get similar results except that I find that the speed is 25 in the bright sunshine. But two everywhere else, even with incandesant bulbs or blue bulbs. I tried both.

yes the light meter is definitely the way to go.

retroshooter
09-21-2006, 03:46 PM
I want you to know I had two different versions of arista rc graded paper. They had slightly different names. I took the thinner version out today just to make sure I was lying about the timing and guess what you are right. Both the sunlight and shadow areas require iso 2 Im a little shocked since the last time i was getting iso 25 out of the thicker one but only in bright sunlight. In shade or indoors it was maxed out at iso 5

murrayatuptowngallery
09-23-2006, 11:52 AM
Thanks for sharing the exposure thought process.