Will be replacing a Sigma 300 f2.8 Prime for a zoom. Finding the loss of a zoom capability quite irritating. Have narrowed it down to the above. Will be using it primariliy for aviation and sports photography. Can get both for the same price which is great. Just wanted to know what you guys thought. Worried that 200mm is too short and the 100mm low end is too far to start with. Has anybody had any experience with them? Dont want to use a tele converter as the loss of quality is a no no. They will be for Nikon mount.
King.
King.