I plan to do a lot of low natural light photography with my most recent purchase, the Canon 20 f/2.8. I was wondering what are the slowest shutter speed I could hand hold my Elan 7 with the 20mm using 800 speed film and still get sharp pictures. I have not used super wide angle lenses of the 20mm variety, my widest lens before was a 24mm. I use Kodak 800 and Fujipress 800 (yes, film, remember that) every now and again for low light situations. I can only assume the inverse "rule" of 1/20 sec. would be as low as I could go but I was hoping to get 1/10 sec. Is this out of the question? Thanks, J.D.