On Thu, Feb 19, 2009 at 12:16:38AM -0800, keith_w scripsit: > Thibouille wrote: >> Mmm Nikon is rumoured to introduce a medium format lineup (MX format) >> based on a sensor of 54x54 mm. If this is true, Pentax MF'd better >> be cheap enough, and Leica is screwed ;) >> >> Anyway, rumours ... :p > > A tiny bit smaller than the old time 2 1/4 square format. What would > the point be?
Probably a fab constraint. These all have to come out of (usually) 200mm or 300mm circles, remember; that's the size of the silicon wafer in the fab. The chip is going to be larger than the sensor area and the die (the chunk of silicon with the chip on it) is going to be larger than the chip area. So I'd bet 54mm x 54mm is the biggest sensor area they can get into a ~60mm square die; three across on 200mm, four across on 300mm. (Can't go right up to the edges.) At less than fifteen per 300mm wafer with perfect yield rates, this would NOT be a cheap sensor. But, hey, purely rumour so far. Applying logistical constraints to rumours may not have useful results. -- Graydon -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
