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Pentax DA 35mm F2.4 vs 40mm XS vs 40mm Limited Review - Image Quality: Bokeh | PentaxForums.com Reviews (Mobile)
Tiniest lens but highest image quality: Pentax SLR Talk Forum: Digital Photography Review
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Tiniest lens but highest image quality: Pentax SLR Talk Forum: Digital Photography Review
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Still liking my K-01!
Pentax DA 35mm F2.4 vs 40mm XS vs 40mm Limited Review - What's in the Box / Specifications | PentaxForums.com Reviews (Mobile)
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Pentax DA 40mm lens - Wikipedia
SMC Pentax-DA 40mm F2.8 XS Reviews - DA XS Prime Lenses - Pentax Lens Reviews & Lens Database
