 BetterPhoto Member |
Pentax Lenses I'm looking at zoom lenses for my Pentaz ZX-7 camera, and would like to know: 1) what's the difference between F and FA autofocus lenses? 2) how does the Pentax brand 100-300mm 4.5-5.6 lens stack up against similar models from Sigma, Tamron, etc.? 3) Does Pentax offer any 200-400mm lenses? Thanks.
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