Всем любящим поспорить (а также читать споры) о качестве оптики рекомендую статью Боба Аткинса (на аглицком). Весьма и весьма поучительно.

Цитата:
The least reliable of all "tests" are the comments in Usenet newsgroups to the effect that "I have that lens and it's really great". You simply have zero idea what the poster considers great. He/she might be judging the lens on the basis of 3.5x5" prints from the local supermarket. They may have just moved up to 35mm from a disk camera. Their eyesight may be so bad that any recognizable image is "great". On the other hand it's possible that they are professional photographers, shooting on a daily basis for critical photo editors.