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01-30-2009, 02:23 AM   #1
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Pentax 55-300mm F4-5.8 - wide open?

can you give me info about max wide open for Pentax 55-300mm f4-5.8?

at 55mm => f4
at 100mm => ?
at 150mm => ?
at 200mm => ?
at 250mm => ?
at 300mm => f5.8



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55-300mm, f4-5.8, k-mount, pentax, pentax lens, slr lens
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