I just purchased my first DSLR, nikon d3000 with 18-55mm VR lens and 55-200mm VR lens, sb600 flash. I need tips! here is my website address: Saras Photography take a look and let me know what you think on some of the pics posted. I am having the most trouble understanding ISO/Aperture/Shutter Speed. I also am trying to learn my flash, nikon sb600. I appreciate any help!! Thanks!