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Thread: question about focal length multiplier

  1. #1
    Senior Member
    Join Date
    Jul 2005

    Default question about focal length multiplier

    hi guys. i have been reading about this Focal Length Multiplier. the 350D has that of 1.6x and Nikons have 1.5x(?) and so on.

    i understand most of it, but am still confused somewhat

    does this mean that what i see is NOT what i get? for example, if i see a WHOLE waterfall thru the viewfinder of the 350D, and i snap the shot, i will not get the whole waterfall in the picture? in the sense that parts of both edges will be cut off?


    because of the multiplier, it changes the focal length of the lens. meaning if i have a 28mm - 105mm lens, i multiply by 1.6 to get 44-168 effective focal length on the digital slr? meaning that i lose the 'wide angle' effect? or...take a simpler example. if i use the canon 50mm f1.8II lens that is so popular, does that mean that instead of getting a 50mm field of view, i get a 50mm x 1.6 = 80mm lens in actual fact?

    do i lose any of the picture at all because of this multiplier thingy?

    is this why there are now special digital lenses like the DC and DG by sigma and the 18-200 DI II by tamron?

    thanks guys

  2. #2
    Senior Member
    Join Date
    Feb 2003
    Outside the Dry Box.


    for the waterfall part... its due to the viewfinder is not a 100% viewfinder...

    if you jump direct to DSLR without using SLR, you won't understand the part... effectively, when you use film 28mm its suppose to cover this amount of width... but when using a crop factor, you might need 17mm to cover the same width from the same location.
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  3. #3
    Moderator nightwolf75's Avatar
    Join Date
    Dec 2003
    really MORE diaper changes
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    pls do a search? this question has been asked numerous times.

    else, read this.
    If Life worked on auto mode then manual mode for photography would have never existed. ― Deeksha Mittal


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