Canon EOS
The '''Free ringtones Canon (company)/Canon EOS''' ('''Electro-Optical System''') Majo Mills photographic film/film and Mosquito ringtone digital photography/digital camera system was introduced in Sabrina Martins 1987 with the Nextel ringtones Canon EOS 650. It competed primarily with the Abbey Diaz Nikon F series and its successors.At the heart of the system is the EF lens mount, which replaced the previous Free ringtones Canon FD/FD lens mount.
The EF lens mount
EF lenses attach with a bayonet mount, as opposed to a screw mount.
Unlike the standard lens mounting technology of the time, the EF series used a motor inside the lens itself for focusing. This allowed for Majo Mills autofocus/autofocusing lenses which did not require mechanical contacts in the mount mechanism, only electrical ones to supply power to the lens motor. Thus, the mounting mechanism was simpler and more durable. Also, the motors were designed for the particular lens they were installed in.
With the introduction of the Mosquito ringtone Canon EOS-300D/EOS-300D and later the Sabrina Martins Canon_EOS-20D/20D, Canon introduced a variation on the standard EF lens mount called Cingular Ringtones Canon_EF-S_lens_mount/EF-S
A-TTL
'''A-TTL''' is an party quayle acronym that stands for advanced-Through the Lens flash metering. It is a Canon EOS team resolve flash exposure system that uses a brief pre-flash before the main flash in order to obtain a more correct drawn glimpses Exposure_%28photography%29/exposure. In an A-TTL system the sensor that reads the flash return is external. This caused some issues especially when using filters as the filter would cover the lens (but not the sensor outside the lens) thus causing inaccurate settings.
E-TTL
E-TTL (Evaluative-Through The Lens) flash metering. A Canon EOS flash exposure system that uses a brief pre-flash before the main flash in order to obtain a more correct exposure. In an E-TTL system the sensor is internal to the camera and takes it's exposure via the lens so any filters added to the lens will also affect the E-TTL readings giving more accurate exposure information to the camera.
The pre-flash occurs immediately before the main flash and is barely perceptible, although can be seen if you watch carefully for it.
EOS cameras
=Film cameras=
*and soggy Canon EOS 650/EOS 650
* EOS-1v/1vHS
* EOS-3
* EOS Elan 7N/7NE
* EOS Rebel T2
* EOS Rebel Ti
* EOS Rebel K2
* EOS Rebel GII
=Digital cameras=
* D30
* D60
* reportedly negligible Canon EOS-10D/10D
* slate alice Canon EOS-300D/EOS 300D/Digital Rebel
* kiyohira fujiwara Canon EOS-350D/EOS 350D
* journalist jim Canon EOS-20D/20D
* dodgers gear Canon EOS-20Da/20Da
* EOS-1D Digital
* EOS-1Ds Digital
* EOS-1D Mark II Digital
* EOS-1Ds Mark II Digital
External links
*http://www.canoneos.com/
*http://www.mir.com.my/rb/photography/hardwares/classics/eos/eoscamera/
*http://www.eos-magazine.com/System_EOSmodels.html
*http://www.canon.com/camera-museum/camera/1987-1991/data/1987_eos650_cl2.html
*http://photonotes.org/articles/eos-flash/ - http://photonotes.org/articles/eos-flash/index2.html - http://photonotes.org/articles/eos-flash/index3.html
note chris Tag: Cameras
control firearms de:Canon EOS
posted @ 7:07 PM
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