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Photo Forum / Digital Photography / Digital Photo / June 2005CMOS x CCD sensors.
Dear members: I am interested in your opinions on the differences between CCD and CMOS sensors for SLR digital cameras. Which one is the best ? Which provides the best image quality, color fidelity and reproduction, greater color space or color gamut, ... ? Suggestions and input on both Sigma's Foveon sensor as well as that available on Fuji's line of digital SLRs will also be relevant and appreciated. I am also interested in reading reviews published in either print journals/photo magazines or online publications. Are there any reviews you would recommend ? Thank you in advance and best regards to all.  SignatureDr. Joseph Chamberlain, D.D.S. Oral and Maxillofacial Surgery Is light sensitivity also a factor? Color space gets into another issue, as does speed. If quality is paramount, one of the large format camera mfrs just released a 22Mpixel camera.. As with a film camera, the variation in intensity within a picture may exceed the sensors range. For example, you may need to take three pictures, each with a different "exposure value", then combine them with a photo editor to obtain maximum detail. Finally, is a camera's "raw format" mode usable with other than the mfrs software? Otherwise the cameras output will be confined to "standard" colorspaces, such as sRGB or perhaps Adobe's. In otherwords, a camera is the sum of its parts. I'm not even going to get into printer color space and limitations. > Dear members: > [quoted text clipped - 14 lines] > > Thank you in advance and best regards to all. CCD stands for Charge coupled device. CMOS stands for Capacitive Metal Oxide Device CMOS is the type of device to make a CCD I hope this answers the question. > Dear members: > [quoted text clipped - 12 lines] > > Thank you in advance and best regards to all. CMOS usually stands for Complimentary Metal Oxide Semiconductor. This means two MOS transistors in a class B configuration (push pull). Is this not the case with optical devices? > CCD stands for Charge coupled device. CMOS stands for Capacitive Metal > Oxide Device [quoted text clipped - 21 lines] > > > > Thank you in advance and best regards to all. > CCD stands for Charge coupled device. > CMOS stands for Capacitive Metal Oxide Device > > CMOS is the type of device to make a CCD > > I hope this answers the question. No - CCD is not made out of CMOS devices, if that is what you are saying. CCD and CMOS detectors are based on different technology. CMOS - which dedicates more of its area to electronics - was thought to be inherrently too noisy to compete with CCD detectors, but that has changed. SignatureMike Russell www.curvemeister.com CMOS is Complementary Metal Oxide Semiconductor and CCD is Charged Coupled Device. CMOS: http://reviews.cnet.com/4520-6029_7-5895345-1.html CCD: http://reviews.cnet.com/4520-6029_7-5895158-1.html?tag=txt Help on choosing sensors: http://www.shortcourses.com/choosing/sensors/05.htm A really good paper on CMOS Vs CCD sensors: http://www.dalsa.com/shared/content/Photonics_Spectra_CCDvsCMOS_Litwiller.pdf SignatureCSM1 http://www.carlmcmillan.com -- > CCD stands for Charge coupled device. CMOS stands for Capacitive Metal > Oxide Device [quoted text clipped - 22 lines] >> >> Thank you in advance and best regards to all. On 6/21/05 6:23 AM, in article vxUte.375$5w3.96@newssvr11.news.prodigy.com, > CMOS is Complementary Metal Oxide Semiconductor and CCD is Charged Coupled > Device. [quoted text clipped - 10 lines] > A really good paper on CMOS Vs CCD sensors: > http://www.dalsa.com/shared/content/Photonics_Spectra_CCDvsCMOS_Litwiller.pdf Thank you very much to all who responded my post. Your answers have been very helpful. Is there a book any of you might recommend that would cover this issue in detail ? Best regards, SignatureDr. Joseph Chamberlain, D.D.S. Oral and Maxillofacial Surgery |
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