For starters, how does a Nikon D100 compare with a D1H or D1X? I would like to purchase one of these bodies to shoot photojournalistic work, sports, and a wide variety of other assignments. I am a young photojournalist, near the beginning of my career, and I am investing in a digital SLR body of my own that I can use for the next couple of years in my career for a wide variety of events and assignments. I would like to take recording speed of images into consideration as well as control of white balance, ISO film speeds, etc. How do these camera bodies compare? Although D1H's and D1Xs are significantly more expensive than D100's, are there obvious advantages and strengths that justify the price differences for a professional photographer? Also, how does a compact telephoto lens compare to two separate lenses specializing in different apertures and focal lengths. For example, I am in the market for a telephoto lens as well. I would like a focal length of atleast 200mm or 300mm (especially for sports and entertainment events). I recently found a non-manufacturer lens (Tokina) for Nikon bodies, that offers compact, wide, telephoto abilities. It is a 24-200mm f/3.5-5.6 lens. Would this telephoto be better than let's say a 80-200mm Tokina lens at the telephoto ranges and a normal lens at shorter distances? I ask this because the differences in price are quite drastic. Is an aperture of 2.8, catostrophically different than a 3.0 or 3.5? Is the lens open that much more? Because comparing prices of lenses, the differences are also very obvious. Also, what is color abberation and aspherical lens elements when referring to lenses? I am not familiar with these terms and components. Thank you very much for reading my posting! I am sorry that I asked so many questions, but there are many things that I would like to learn and I am in the process of learning. Have a wonderful day whenever you read this! Thanks again!