Why no 40mm pancake (or similar)?: Micro Four Thirds Talk Forum: Digital Photography Review
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Amazon.com : Pentax K-Mount HD DA 40mm f/2.8 40-40mm Fixed Lens for Pentax KAF Cameras (Limited Silver) : Camera Lenses : Electronics
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New Canon 40mm Pancake - A Threat to Pentax? - Articles and Tips | PentaxForums.com (Mobile)
