Hello i have canon 300v but i would like to buy a canon 3000n and 1000F n for quite low price but i need some advice if they are good as similar the 300v that i have in 3 units or not ? are in good conditions very low price. But is there any know defect ? with central point is fast the autofocus with modern lens as the 300v ? inside the view finder is possible to have numbers that show exposure ?