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Forum: Pentax SLR Lens Discussion 06-01-2011, 09:58 PM  
Max Aperture Design Limitations
Posted By twitch
Replies: 71
Views: 10,177
Canon & Nikon have 200mm f2 lenses for around $6k while their 200 f2.8's are $1k or less. So 1 stop is $5k or 6* the price. I guess f/1.8 is possible but that might end up being a $12k lens, probably no market for it....
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