I have discovered an unopened box of 4x5 Ektachrome 100 with a 9/2004 expiration date in the back of the closet..
I thinking about ordering an E6 kit and shooting this stuff up while practicing with a new camera prior to a big trip out west.
If it were less than a year past expiration, I wouldn't worry about it but I've never used anything this old.
Will this film be good enough to let me compare relative exposures, check the film holders for leaks and lenses for flair or is it likely too far gone to be worth spending the money on the processing kit?
It is not that far out of date compared to some of what I have shot successfully, but since it has not been in the fridge, I would expect the film to definitely have poor color (probably a magenta cast), and possibly some fog (loss of strength in the blacks). I'd use it for cross processing if you can't tweak it to look normal with a few tests.
It should be fine for testing. You'll get images, but don't use it if you're photographing important things. There's no reason to cut costs if you want to produce great images.
Daniel,
I have you beat for out of date Ektachrome, how about 1 roll with a develop before date of 8/1958. No, wait! 2 rolls of Ektachrome with a develop before of 8/1955 too!
All three are E620 E-2 processing
Unfortunately the roll film adapter that came with the Speed Graphic (and film) was broken.
can't beat your dates but I used some Ektarchrome that has been expired for 20 years.
The Ektachrome will probably give you a magenta cast, how strong it is will most likly depend on the age of your film. here are two of my results. I actually liked them.