Hi,
anybody know what the quality of the new sigma 300 or 400 tele apo macros
is, especially
compared to the Pentax 300 f4 and 400 f5.6 lenses.
Will a Pentax 1.4S teleconverter work on the sigma lenses?
Anybody how can help me choose a versatile telelens, I'm not sure if 300 or
400mm is the
better choice.
bye,
Frank
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