Yea, what Michael said. Megapixels are not created equal. Or, maybe it's more correct to say that not all imaging sensors are created qually. The quality of the 8megapixel Canon EOS 1D Mark II blows the doors off of any consumer 8mp camera. In fact, most 6mp D-SLR's are way above the 8mp consumer cameras. Yup. Those lenses should work. And yes, the Nikon D100 and D70 have a 1.5x cropping factor. Your current lenses would shoot like a 105-450mm f/4-5.6 lensand a 42-120mm f/4-5.6 lens. A friend has a D100 and he loves to shoot wide angle. I think his favorite lens right now is the 18-35mm or something like that. -=>Donald