why didn't canon extend the use of fixed pellical mirror to other eos? my rebel 2000 has depth of view preview but when this is useful? Thank very much

-- tokamak (sir-tokamak@hongkong.com), May 17, 2001

Answers

The pelical mirror is a great concept, drawback is you loose 1/3 stop. Darker view finder, and the mirror itself is delicate, and cost of making the mirror is on the high side. But all said good idea you get no shutter blackout which is nice with flash,if a model or whoever should happen to close his or her eyes you will catch it. capturing that precious moment Plus great for macro, no mirror vibes. All though my 1v does just as good if not better with macro ttl etc etc. , almost zero vibration Hoped I helped with your question Rich.....

-- RichDattilo (fire@nls.net), May 17, 2001.

Depth of field preview is useful for...checking depth of field. what this means is, seeing the effects of the set aperture in the viewfinder: When you look through the viewfinder of the rebel 2000, you are looking through the lens at its widest aperture. focusing on something causes background to be out of focus. however, the aperture to which the lens stops down at the moment of exposure will yield a different effect on the background-basically, at a smaller aperture more background will be more in focus. you can see what WILL BE in focus by pressing the depth preview button. if you look through the lens in front when you press the button you can see the aperture get smaller. looking through the viewfinder, your viewfinder darkens because less light is getting in, and the focus of the background changes. thus you can adjust aperture for the desired depth of field by seeing the effects. does that make sense?

-- peter bg (pbg333@hotmail.com), May 17, 2001.

Prior to the EOS 1NRS, Canon offered the EOS RT (which also used a pellicle mirror). RT's sell second-hand for about $300 on ebay.

-- Dave Herzstein (dherzstein@juno.com), May 21, 2001.