A Russian friend of mine, an aspiring aviation photographer, asked me for a favour, which is to ask for an advice for him here. He wants to buy a new lens, and he would like some opinions from the seasoned A.net photographers. As for the picture quality, he has A.net standards in mind, and he thinks this forum would be the best place to ask this sort of questions.
His options are the Canon 70-300 4-5.6 IS USM, Canon 75-300 4-5.6 IS USM, or Sigma 50-500, he needs to decide on one of them.
He works at an airport, so he can get fairly close to aircraft, but he also takes quite a few pictures at a fair distance, in wide range of different weather and at night.
Any input would be greatly appreciated.
[Edited 2007-04-27 03:40:11]