RickH wrote:
Maybe they are trying to force the amatuer to go and by the NMUSAF professionally photographed book that is in the gift shop ?

If it's hard for the amatuer to shoot decent shots of the aircraft, they really won't have any choice if they want decent pictures to remind them of their visit to Dayton.

You can download high res color shots of most of the Museum's aircraft from the website. In many cases there's 'as displayed' shots and shots (presumably) taken post rollout, before going on display, so that 'conspiracy theory' has a big hole in it.

I've found them very useful for articles and discussions. In many cases they also include restoration and cockpit shots - something amateurs won't get or can't get, except by lucky timing on their visit to the restoration area. This is all a service few other museum provide.
In 2007 with a museum that allows a tripod, and using even a cheap digital, it is possible to take decent shots in very low light conditions and balance them either then or after for correct hues. Given that the majority of happy snappers can't get mum with her eyes open or a decent shot of an aircraft on the flight line without screwing it up, it's just another hurdle for the most. A little effort solves a lot. (Sounds harsh, but if I had a cent for every poor shot I'd been offered, as an editor, of a perfectly displayed aircraft, I'd have, well, some cash...

)
Museums are just as much driven by fashion and aesthetic judgements many of us won't like as most other parts of life, don't kid yourself there's no 'art' and 'aesthetics' going on. Personally, I quite like the shots I've seen in the halls at the NMUSAF, and prefer the darker ones to the 'white operating theatre' ones.