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  1. #1
    Join Date
    Jan 2006
    Posts
    5

    LCD screen or viewfinder

    im kinda new to the whole digital SLR cameras and i have been shopping but i can find one where you can ust the viewfinder and/or the LCD screen to take pictures with. could somebody please help me out and point me to some cameras that do this. i would like it if i could do both at the same time. but is i have to push a button or something to switch it then thats fine too.

  2. #2
    Join Date
    Jul 2005
    Posts
    6,590
    There are currently no DSLR's that have LCD "pre-view" as it is called.
    There are two reasons for it, both technical.

    The 1st one is that SLR stands for single lens reflex. It means, only one lens is used to look through and to make photos through. The way this is done is with a mirror, the mirror deflects the light up when not taking a photo, allowing you to look through the lens using the view finder. The mirror will snap up when the actual photo is taken. So, you can not show anything on the LCD because there is nothing to see except the back of the mirror.

    The 2nd reason is that DSLR's have big sensors. This is what makes them so attractive, they are more dymanic, have less noise, and you can be more creative with depth of field. It also means that the big sensor generates a lot of heat. If you would have live preview, the sensor would continuously be working, and get much too warm. So, that is the 2nd reason DSLR's have no live preview, the sensor would generate too much heat while producing images for the LCD.

    The 2nd reason is also the reason why you do not have movie modes on any DSLR, it is simply impossible. So is a panorama mode all Canon cameras except their DSLR's have, you can not use the LCD for framing.

    There are two exceptions to this "no LCD pre-view" though.
    The Canon 20Da has live preview for 20 seconds especially for astrologocal use. You may only use it at night, and 20 seconds is the limit due to heat reasons.
    The Sony R1 is not a DSLR, yet it has a large DSLR-like sensor and allows live preview. The CMOS it uses produces a lot less heat than CCD you mostly find in Sony using DSLR's, and this makes that possible. It also does not use a mirror (it is not a DSLR) so they did not have to solve the problem of designing a mirror that can either be used and down, or parked and up while using the LCD for framing.

    As the Sony R1 shows, advancements in CMOS technology will bring DSLR's with live preview options closer. But we will have to wait a bit still, before both the mirror design and sensor problems can be tackled.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  3. #3
    Join Date
    Jan 2006
    Posts
    5
    ok well that helps me some but i have seen an old olympus that does both. my wife wants something that she can change out the lenses in and still use the viewfinder and/or the lcd screen

  4. #4
    Join Date
    Jul 2005
    Posts
    6,590
    Quote Originally Posted by winged_fear
    ok well that helps me some but i have seen an old olympus that does both. my wife wants something that she can change out the lenses in and still use the viewfinder and/or the lcd screen
    Which old Olympus was that?
    She is probably not the only one who wants that, but she will have to wait till they are actually available... and that may take years.
    Maybe Sony is developing one with Konica Minolta... maybe Canon is working on one... maybe someone else, but since there have been no announcements you may well be waiting years.
    Last edited by coldrain; 01-12-2006 at 05:00 PM.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  5. #5
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    1,068

    Wait till January 26?

    Quote Originally Posted by winged_fear
    ok well that helps me some but i have seen an old olympus that does both. my wife wants something that she can change out the lenses in and still use the viewfinder and/or the lcd screen
    I don't know what camera you're speaking of, but there have been rumors/hints that Olympus may be about to announce an SLR with dual ovf/LCD; see:

    this and this.

    No one knows what's really involved, but at the time of the Olympus+Panasonic 4/3 agreement a year ago, they said they were aiming for the release of a new camera based on jointly developed technology at PMA 2006, which opens February 26 in Orlando. Lost of speculation, not much more.
    "...and only the stump, or fishy part of him remained."
    Green Gables: A Contemplative Companion to Fujino Township

  6. #6
    Join Date
    Jan 2005
    Posts
    42
    E-10/E-20 are DSLR with OVF and LCD preview, but no interchangeable lens.
    cheers

  7. #7
    Join Date
    Jul 2004
    Location
    Monterey Bay
    Posts
    6,028
    Yup. I can see it now. dSLR with 70-200 f/2.8, hand held, using the LCD for framing. It will certainly be interesting.
    D7000, D70, CP990, CP900, FE.
    50mm f/1.8, Sigma 18-125, Sigma 24-70 f/2.8, Nikon 18-105 VR, Nikon 55-200 VR, Nikon 43-86 f/3.5 AiS, Vivitar 28-90 F/2.8-3.5 Macro, Vivitar 75-205 F/3.8-4.8, SB800.
    Ha! See, I can change...


    http://d70fan.smugmug.com/

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