----- Original Message ----- From: "Michael Perham" < Subject: 24 X 36 Digital Image Sensors
> I was just browsing Mamiya's web site and noticed that amongst the > numerous digital backs available for their 6X7 cameras, the two most > popular size of image sensors are 72 X 96 and 24 X 36; the 35 mm format. > > If this size of digital image sensors are so readily available, offering > 6.3 megapixals and a 12 F-stop dynamic range, why is there such a dearth > of 35 mm digital SLR camera's with 24 X 36 sensors, and such a > preponderance of cameras with smaller sensors that require a +1.5X > factor using standard 35 mm lenses. I can see smaller sensors in ZLR's > (camera's with non-interchangable zoom lenses), but if using a body > designed to use a manufactures existing line 35 mm lenses, then why not > offer 24 X 36 sensors? > > Any thoughts? Mike. I think we discussed this a short time ago. It has to do with the way the CCD is manufactured, with the actual sensor sitting at the bottom of a "well". The light leaving the lens travels at an angle to reach the sensor, and consequently is vignetted by the way the CCD is built. Are you sure about the 72 x 96mm sensor? The Mamiya is effectively a 7x7 cm camera because of the rotating back design. A sensor with the dimension you mentioned would be somewhat larger than what the camera was designed to cover. William Robb - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
