david b said:
As some of you know, I will be traveling to Oaxaca in about 45 days.
I am taking 200 rolls of film with me. 100 rolls APX 100, 20 rolls APX 25 and 80 rolls Pan F+.
If I have the security at the airport hand check these, I will be there for an hour or more.
So my question is this:
Will the "carry-on" X-ray machine hurt any of this film?
I just got back from a trip to Hawaii, with the same issue. It really depends on how many times you go through. The hand check xray machines are much weaker than the baggage machines, so if you have <400ISO film, you should be OK for one or two passes.
However, I found that with Hawaii's agriculture check (the do an xray check) plus the island hops I did, I was going to expose my film to too much radiation for my taste. So I had them hand check my film.
Here are some ways to reduce your time with the TSA inspector:
1) Carry your film in a separate clear plastic bag (like a 1 gallon ziplock bag) that is easily removed from your camera bag (keep it in an outer pocket).
2) If 120/220 roll film, go ahead and open the box or foil wrapper. They will need to look in each one. If 35mm, take the rolls out of the container.
3) If you have a mix of 35mm and 120/220, consider separating them into different ziplock bags.
4) Try to avoid having film in the cameras themselves, so that you can just let them be xrayed. If you want them to hand inspect your full kit, expect to spend more time with them. If you do have film in the camera, just let it get a dose of xrays. It should be OK, since presumeably you won't have the same roll in the next time you go through security (if you do, why are you bringing so much film?

)
The inspector wants to see and touch the actual rolls, so if you make it very easy for them to do, the inspection will go much more quickly. If they have to open each box or foil wrapper, it will take forever. If you do it as I described, I can't imagine them taking more than 5 minutes to go through 200 rolls.
If you are worried about film freshness and want the foil packages, consider checking them in your checked luggage and putting your film back in them when you arrive at your destination. Otherwise, I'd imagine the ziplock should be good enough for your trip.
If you are bring IR film, all bets are off. I have no idea what to do with that other than calling them in advance and making a special arrangement. I haven't done it, so I'll defer to someone with expertise in that regard.
-chuck