Archived posting to the Leica Users Group, 2006/09/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Here you go, from: http://www.steves-digicams.com/2003_reviews/e1_pg2.html In fact, someone notes that the M8 sensor is about the same size as two E-1 sensor stuck together :-) **** Interline CCDs have traditionally been used in digital cameras and are either interlaced or progressive scan sensors. Interline chips are designed with a path or "highway" to move data. This highway takes up valuable real estate that could be used for image capture and reduces the size of the photodiode in each pixel. The E-1 Full Frame Transfer CCD transfers image data via a Vertical Charge Register that is a fraction of the size of an Interline highway. In fact, the active pixel area of the Full Frame CCD is 1.5 times larger than an Interline CCD of equal size. Using less of the pixel to transfer data means more space can be used to capture data for better image resolution. The Full Frame Transfer CCD uses more of the pixel area to actually act as a sensor with a wider aperture for the photodiode and larger pixel capture area. With its larger capacitor, a Full Frame Transfer CCD captures more electrons than a conventional Interline CCD to deliver higher sensitivity, higher Signal/Noise ratio, and wider dynamic range and greater latitude. The E-1's progressive scan Full Frame Transfer CCD allows for better speeds and higher image quality than found in many 6+ Megapixel Interline CCDs. *** At 12:44 PM 9/21/2006, Didier Ludwig wrote: >Larry, Richard, > >"Full frame" is always meant in relation to a particular frame size. For >the Canon 5D and EOS-1DS MkII sensors it's 36x24mm. > >The 4/3 system is a full frame system in relation to its own sensor size. >Their lenses are built to cover the 4/3 sensor only. > >Most lenses of other manufacturers still cover the 36x24mm format, except >the newer DX, DC etc. versions which are optimized for 1.5 or higher crop >factors (and thus not usable on fullframe/film bodies). > >Didier > > > > > > >"Full frame" doesn't refer to the physical size of sensor, so they are > not implying future 35mm sensor or APS size sensor. It refers to some > characteristics of the sensor. If you google on some earlier article on > the Olympus E-1, you will find some descriptions. They call it Full Frame > Transfer or something like that and it similarly causes heckles among > some since the E-1 4/3 sensor is only about 1/4 of a 35mm frame. > > > >At 10:47 AM 9/21/2006, Lawrence Zeitlin wrote: > >>Is the term "full frame" in the last paragraph an indication of > >>things to come or was it just an unfortunate slip of the tongue? > >> > >>Larry Z > > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information // richard (This email is for mailing lists. To reach me directly, please use richard at imagecraft.com)