Wondering if anyone can help me with a Nikon question. I have a D70S. My father has given me three lenses, two of which I am not sure how to use. (I do not have the money at the present time to take a course.) These are the lenses: Nikkor 50mm f/1.8D AF Nikkor 75-300mm Could anyone tell me how I should use these lenses? (I am planning on taking mainly architectural pictures - primarily in NYC.) Many thanks!