#1 I wasn't aware that f-stop affected the sharpness of a lens till yesterday when i started reading lens reviews on dpreview.com. Is this the same for film cameras? I have been trying to find information about what f-stops would be the sharpest for my current cameras. I have quite a long list of lenses but I'm mainly concerned about the ones I use most. Is there any general rule like the middle range f-stop is usually the sharpest? It seems like dpreview's lens reviews usually find f4-8 the best. Nikkor 28mm f/3.5 (3.5, 4, 5.6, 8, 11, 16, 22) Nikkor 55mm f/1.2 (1.2, 2, 2.8, 4, 5.6, 8, 11, 16) Olympus C-5050z 7.1-23mm f/1.8-2.6 and as low as f/8-10 would really like to get an idea of which f-stops are best for this since I've started using it a lot. #2 I also have a tamron 28-200mm asph. for canon eos mount but I've always prefered prime lenses as I felt zooms weren't as sharp. So do you think the nikkor's are better? *edit I found this listed on photodo.com and it got a 2.7 score so it probably is much worse. #3 I want to get a lens hood for my 55mm nikkor. I found Nikon | HB-34 Bayonet Lens Hood | 4126 | B&H Photo Video. Will this be the correct field of view since its for a 55mm zoom or not? K, that's all for now. Thanks for any help.