The two-channel that wouldn't live

So I set about trying again. Because I already had the second channel subject set up, I exposed this plate "backwards" right to left (for anyone who missed it, the first plate was exposed left to right).

After processing the left channel was again dim and ugly with the right being bright and clear. What the?

Looking at this second plate it almost looks like the left channel was under-exposed. Which is odd because all my exposures are automated and both channels were exposed the same amount of time.

can't find any sources of stray light and don't believe object movement is at fault since I would expect the second channel in the first hologram to be dim rather than the first (since I had just flipped the subject).

Sunday...

Well, this has gone behond the realm of concidence an on to alien influenced madness.

Just kidding about that last part.

I shot another two-channel last night with the same results. In this case I didn't bleach the hologram before finding out how it went and found that again, the left channel was dim and ugly. It also appeared to have received more light than the right channel.

I've checked the light ratios between the channels and both are spot on at 3:1 and the exposure times were correct for each channel.

The only theory I have at the moment is perhaps murphy was visiting me and somehow the shutter didn't close fast enough on the left channel (three times in a row, right) which caused it to be over-exposed. I've done a series of tests on the shutter and software controlling it and it's worked properly in each test, so this isn't much of a theory.

I'm going to be doing another this morning with a different subject and will also post the results later.

later...

The try this morning came out well except for the fact that the subject moved on the first exposure. I can tell that it rolled slightly. That's a bit odd since it had been sitting on the table overnight.

I'll have to try again tomorrow.