John,
Back in the mid-80s I picked up Astrophotography: Featuring the Fx System of Exposure Determination by Barry Gordon. Covers the basics and his Fx system is a very easy way to choose the right combination of exposure time/f-number/film ASA rating based on the brightness of the object. Used it mainly for prime focus and eyepiece project photography.
Piggyback photography with a modest focal length lens (around 200mm or less)it much more straight forward. You don't need a book to start. Just....
- choose relatively fast film to start (I use Fuji 400 or 800)
- get polar aligned
- choose a target
- ensure the camera doesn't shift on the piggyback mount
- bracket your exposures using a cable shutter release - you may be able to go 5m or more with good alignment & tracking without guiding if you don't have too long a focal length lens
- take multiple shots at each exposure setting just in case
- being able to guide via a guiding eyepiece on your scope helps but isn't necessary to start...required for longer focal lengths
- I don't usually use the 1hr development places
- you can usually get the developer to vary their printing process a bit to improve on original results
-practice and have fun
Tim
