do you read any PHOTO MAGAZINES ? our municipal library carries several magazines that can be taken out for a week at a time . they also provide a lending service for rural communities . they'll send library magazines and books from the central libraries to smaller branch libraries in the surrounding areas .
two or three times a year they also sell old magazines quite cheaply - always a good source for information .
i would think you should be able to acccess some library service in your area .
you might also consider joining an amateur camera club - you should be able to pick up lots of info at little or no cost .
another information source might be a community college and their research services . START KNOCKING ON DOORS !
attached is a google page with several photo-mag listings .
for my money , zeiss-ikon lenses are hard to beat for quality - SONY uses them in some cameras .
GOOD LUCK !