RE: 24 X 36 Digital Image Sensors
Before the Phillips chip all 35mm size sensors are made from multiple smaller ones. Kent Gittings -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Michael Perham Sent: Sunday, December 02, 2001 4:50 PM To: Pentax Discussion List 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. - 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 . ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ** - 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 .
Re: 24 X 36 Digital Image Sensors
In a word, cost. Check out the price on those backs. I believe the Phillips CCD is the first affordable 24x36 CCD, but even with it cameras would be in the $7K range. Like all electronics, big CCDs are getting cheaper and we will, no doubt, see some reasonably priced full frame sensors "real soon now". Why are add on backs available for 2-1/4 cameras and not 35mm? That is simply an issue of back spacing. The difference between the back of the camera body and the film plane. You will note the digital backs are available only for cameras with interchangeable backs or magazines. But of course separate bodies can be made that use the same lenses and viewfinder system as their film cameras. Several manufactures already do so. Ciao, --graywolf - Original Message - From: Michael Perham <[EMAIL PROTECTED]> To: Pentax Discussion List <[EMAIL PROTECTED]> Sent: Sunday, December 02, 2001 4:50 PM 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. > - > 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 . - 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 .
Re: 24 X 36 Digital Image Sensors
William Robb wrote: >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. > Yes! Mamiya's site show four different models from Better Light Inc. with 72 X 96 sensors . Mike. - 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 .
Re: 24 X 36 Digital Image Sensors
- 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 .
