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Thread: mirror lens

  1. #21

    Default Re: mirror lens

    Quote Originally Posted by jeanie View Post
    does anyone know if there is a short focal length mirror lens available in the market that can fit nikon?

    i very much love the 'ring effect' on reflections for portraiture.

    appreciate all inputs.
    MC Rubinar 300mm f/4.5

  2. #22
    Moderator catchlights's Avatar
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    Default Re: mirror lens

    Quote Originally Posted by mummum View Post
    MC Rubinar 300mm f/4.5
    Wondering how is the image quality of this MC Rubinar 4.5/300 Macro Telephoto Lens for Nikon?
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  3. #23
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    Default Re: mirror lens

    err.. I assumed it is understood that there must be 2 mirrors.. so conveniently left out mentioning the other mirror behind the front element..

    anyway.. the 1000mm lens.. any info on the pricing?


    Quote Originally Posted by catchlights View Post
    is two mirrors in the lens, not one.
    anyway, Nikon made a 1000mm mirror lens at f11, another mirror lens, 500mm at f8, both are discontinued, other makers are making 500mm, 600mm, 800mm or 1000mm, the only one 400mm mirror lens I came across is the sigma 400mm f5.6, and that is the shortest. the lens barrel is only about 4 inches long. "IF" there is any shorter mirror..... is gonne be like a pancake.

  4. #24
    Moderator catchlights's Avatar
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    Default Re: mirror lens

    Quote Originally Posted by Limsgp View Post
    err.. I assumed it is understood that there must be 2 mirrors.. so conveniently left out mentioning the other mirror behind the front element..

    anyway.. the 1000mm lens.. any info on the pricing?
    Nikon Mirror lenses are discontinued, no idea about the pricing.
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  5. #25
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    Default Re: mirror lens

    In telescope there is such thing as focal reducer like 0.63x, not sure if there is same thing for cam lens. If yes, 500 x 0.63 x 0.63 will get about 200mm, at the same time the F stop get smaller.
    D300 & P5100 :bsmilie:

  6. #26

    Default Re: mirror lens

    Minolta made a 250mm CAT lens. I remember it distinctively because it was pretty much the size of an older school Nikkor 50mm 1.4 Not sure if there are adapters to fit a Nikon.

    http://cgi.ebay.com/Minolta-250mm-f-...QQcmdZViewItem

    Tamron made a 350mm CAT in the old days. http://www.adaptall-2.com/lenses/06B.html There was one on e-bay http://cgi.ebay.com/ws/eBayISAPI.dll...m=160308233878

    Look around. I won't be surprised if the Rokkors and Tammies turn up from time to time. Also, there might have been OEM manufacturers like Spiratone producing odd-ball focal length CATS. Another possibility is to explore Soviet made CAT lenses. Apparently, they were manufacturing them before the Japanese did, so they probably had a head-start.

    FYI, it seems that Sony has a 500mm AUTO FOCUS CAT lens for their Alpha range.

  7. #27

    Default Re: mirror lens

    Just a couple of points to make:

    1) The donut highlight effect is partially due to the presence of the central obstruction caused by the mirror and partially due to the very shallow DOF.

    2) If the donut hole is not concentric with the outer rim, it means that the lens is not collimated and is one cause for the image not being sharp.

    I have not tried it before, but looking at point #1, can we create the effect, perhaps using a 135mm F2 with a piece of small round black paper placed in the centre of a protective filter in front of the lens? In the normal mirror lens, the diameter of the central obstruction (in this case the black paper) is about 30-40% of the diameter of the aperture. For example, if the filter size is 67mm, the central obstruction can be about 25mm.

    Do note that the presence of the central obstruction will reduce the brightness, sharpness as well as the contrast of the image slightly.

    Maybe the TS or someone else can try this out and let us know?

    Kay Heem

  8. #28

    Default Re: mirror lens

    The minolta 250mm can be fitted onto nikon with modification. A few friends of mine have it.
    Chanxj
    my blog @ http://sgsnap.com

  9. #29

    Default Re: mirror lens

    The Mirotar 500 is outstanding:




    100% crop:

  10. #30
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    Default Re: mirror lens

    Quote Originally Posted by jeanie View Post
    does anyone know if there is a short focal length mirror lens available in the market that can fit nikon?

    i very much love the 'ring effect' on reflections for portraiture.

    appreciate all inputs.
    Aiya...just take your favourite portrait lens, cut a piece of circular black paper and past it on the center of the front element (or skylight filter better) then you simulate the center obstruction of the mirror lens to give ring effect bokeh liao mah...can experiment with different sizes some more....
    As complexity rises, precise statements lose meaning and meaningful statements lose precision.

  11. #31

    Default Re: mirror lens

    Don't even know if TS is checking back on her thread, but in case ...

    http://www.clubsnap.com/forums/showthread.php?t=490094

  12. #32

    Default Re: mirror lens

    Quote Originally Posted by Dream Merchant View Post
    Don't even know if TS is checking back on her thread, but in case ...

    http://www.clubsnap.com/forums/showthread.php?t=490094
    yes i do.thanks for all suggestions.

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