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Thread: filter for 360 f:5.5 Tele-Xenar

  1. #1

    Join Date
    Jan 2001
    Posts
    4,589

    filter for 360 f:5.5 Tele-Xenar

    Can anyone tell me what is the filter size for the rear element? TIA.
    Wilhelm (Sarasota)

  2. #2

    Join Date
    Sep 1998
    Location
    Loganville , GA
    Posts
    14,409

    filter for 360 f:5.5 Tele-Xenar

    A filter should never be used on the rear element (unless the lens was designed for a rear filter). However if you do want a focus shift and image degradation go right ahead and put one there. Just remember, besides a focus shift of about 1/3rd the thickness of the filter, any mark, dust, scratch, fingerprint, etc. on the filter will materially effect the image. The effect will be worse then using that same filter, in the same condition, on the front of the lens.

  3. #3

    Join Date
    Nov 2003
    Posts
    1

    filter for 360 f:5.5 Tele-Xenar

    Hey Bob

    Where'd you learn to answer questions like that? Frank Nelson teach ya? Or have you served as Secretary of Defense lately?

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