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Mirror lenses?

Discussion in 'Pentax Chat' started by oldtimer, Feb 2, 2007.

  1. GeoffR

    GeoffR Well-Known Member

    Re: Mirror lenses? Tamron is great

    A 500mm Mirror shines over a conventional 500 because it is a fraction of the cost. Over a 200, greater magnification obviously, but the 200 could be faster for less of a premium.
     
  2. oldtimer

    oldtimer Well-Known Member

    Re: Mirror lenses? Tamron is great

    I followed the link and found a 500mm lens for $99 which is roughly £50 - plus postage, import duties etc.

    I finally got a S/H 500mm mirror lens - for around 50 notes - seems to be about the going rate on ebay.

    I am still trying to get used to it. 500mm on a digital camers is 750mm in 35mm terms - an awesome magnification. These lenses are manual focus and my eyesight is not what it was, so I am struggling a bit. The depth of field is very small making accurate focus essential. Consequently it is not much good for action photography unless you pre focus. I have not found the fixed f8 a problem and the physical size is certainly much better than a conventional lens.

    The lessons learned so far?
    1) Handling a 500mm telephoto is a world away from even a 300mm lens. For a start you become a prisoner of a tripod, then there is DOF, shake, etc to contend with.
    2) I rely on auto focus so will probably upgrade when I have exhausted the learning potential of this lens
    3) It will cost £500 - £750 to get a suitable replacement. (Sigma do a couple of options)- so that is a few birthday/Xmas presents all rolled up together
    4) For bird and other nature work, a lens of this length sure makes a difference.

    500mm for 50 notes is not going to produce a world beating performance, on the other hand it is not going to break the bank if it does not come up to scratch - you can always sell it on. It is certainly better than spending £750 and finding that it is not for you.

    I hope that is of some help

    Graham
     
  3. Done_rundleCams

    Done_rundleCams AP Forum Ambassador to Canada

    Re: Mirror lenses? Tamron is great

    Morning Graham,

    Congrats on getting the lens and looking forward to seeing some pics :)

    Cheers,

    Jack
     
  4. Gordon_McGeachie

    Gordon_McGeachie In the Stop Bath

    Re: Mirror lenses? Tamron is great

    Wish I could get a 500 mirror for 50 notes....a/f of course.

    We all have dreams
     

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