I have 2 cameras and 4 lens'es. 3 are nikon and 1 is Tokina. My cameras are a D50 and a D80. All 4 work fine on the D50 but the Tokina although it works on the D80 , the sharpness is not as good as the D50. my other lens are all zoom , 300,200 and 150 and they work fine on the D80 niece and sharp. Someone told me at rutland last week that some cameras with higher megapixels show up flaws in older lens'es which means not so sharp pictures. Is this true.