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  1. #1
    Colin Corneau's Avatar
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    8x10/300mm lens - 35mm focal length equivalent?

    Title says it all...I'm just starting out with the big boy and wondered

  2. #2
    David A. Goldfarb's Avatar
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    It's usually considered a normal lens--use it like you would a 50mm on a 35mm camera, or thereabouts. Since the shape of the frame is different, there really aren't "equivalents."
    flickr--http://www.flickr.com/photos/davidagoldfarb/
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  3. #3

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    This might help give you an idea of FOV 'equivalents'.

  4. #4
    Denis R's Avatar
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    44mm 50*

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  5. #5
    Greg Davis's Avatar
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    A lens with a focal length of 45mm is closest with 50mm being runner up.
    www.gregorytdavis.com

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  6. #6
    Christopher Walrath's Avatar
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    Wirelessly posted (BBBold: BlackBerry9000/4.6.0.297 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102 UP.Link/6.3.0.0.0)

    Yup, widish normal lens focal length.
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  7. #7
    df cardwell's Avatar
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    If you are making an 8x10 from the 35mm, a 300mm is like a 38mm.

    If you are making a 6.3 x 9.5 (an 8x10 neg counting the border) the 300 is like a 45mm on 35.

    In any case, between a 35mm and 50mm.

    A classic 2 lens outfit for 8x10 has been a 10" and either a 14" or 19".

  8. #8

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    Diagonal of 135 is 43.2mm.
    Diagonal of 8x10 is 305mm.
    300/305 = 0.9836
    0.9836 x 43.2 = 42.49mm

    Can't get more precise than that unless you measure the aperture opening of a specific 135 camera and of a specific 8x10 film holder. But DF is right... if you crop 135 to 8x10 that changes the formula.

    Diagonal of cropped 135 is 38.4mm.
    0.9836 x 38.4 = 37.8mm

    So a 35mm lens on a cropped 135 image (24x30mm) is closest to matching a normal (305mm) 8x10 lens and is even closer matching FOV of a 300mm.
    Last edited by Mike1234; 11-17-2009 at 08:57 AM. Click to view previous post history.

  9. #9
    Bruce A Cahn's Avatar
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    mikes got it



 

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