Sigma 28-300mm lens question - PentaxForums.com

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11-15-2009, 11:48 AM	#1
adwb Veteran Member Join Date: Sep 2009 Location: Bristol UK Photos: Gallery Posts: 1,636	Sigma 28-300mm lens question Please can any one tell me if they have used a Sigma 28-300 lens on their Pentax camera? I have been offered one which on it says Aspherical IF aperture range is 1:f3.5 to1:6.3 max f22 I can find info on macro version but not this one, I was wondering if any one had used this lens and where any sweet spot was found at various focal lengths etc. Alistair

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