That looks like a big lens

Discussion in 'Lens Lust' started by DanielD, Mar 24, 2007.

  1. Came across this one today:


    Look at that lens barrel peeking out of the roof(!)

    Well actually while I was taking that picture (I came from that side first) I wasn't actually sure that it was a lens, but I somehow assumed, as I couldn't believe it would be allowed to build up that big cannons in the city. :wink:

    This is the front

    and the top

    It turned out to be an observatory, as expected. The strange thing is that it's the first one I saw that has a "lens" that was fixed in direction, but has some funny rail mechanism instead. But what for? AF? Zoooom!?:eek:

    will have to look if they have a website that explains...
  2. Hah. Found it. Wow. It's movable:

    250px-Berlin_Treptow_Archenhold_Sternwarte.jpg [​IMG]

    According to their website/wikipedia, it is the world's largest lens telescope, that means its design is actually based on real lenses! No mirror stuff!
    Holy smokes!
    It was built 1896, weighs 130 tons, has a focal length of 21 meters, and - important for those who want to attach a filter - the front element has a diameter of 68 centimeters. They don't tell if it's threaded, though. :wink:
    The magnification is 210x.

    Oh, and those rails are merely to move the roof, as that telescope was too big to completely put it into a building.
  3. wbeem


    Feb 11, 2007
    Sanford, FL
    William Beem
    It looks like a rail gun from WWI.
  4. Faceman


    Aug 19, 2006
    LI, NY
    Ask them if you can put it on your camera and snap a few shots.
  5. I was going to say, ask them what the flange to film plane distance is to see if you can get an adapter :D
  6. Is this a macro lens or should we use extension tubes ?
  7. wbeem


    Feb 11, 2007
    Sanford, FL
    William Beem
    Have they ever seen anything that was looking back at them?
  8. Gale


    Jan 26, 2005
    Viera Fl
    Really nice shots.
    Hummmmm I need a light weight lens that long:>)))ahahahaha
  9. JoeG


    Nov 2, 2006
    Tyrol, Austria
  10. Julien


    Jul 28, 2006
    Paris, France
    Imagine the price of a CIR Polarizer for that :505: :505:
  11. Julien, you are killing me...
  12. CAJames


    Sep 6, 2006
    Lompoc, CA
    Anyone know when they will be coming out with a VR version?
  13. wbeem


    Feb 11, 2007
    Sanford, FL
    William Beem
    It could be a Canon.

  14. Yes, the face of the cleaning personel who was wiping the front element.
  15. Thanks for all the comments :biggrin:
    No, I guess VR is not needed. The mount looked stable and I guess it's not hand holdable.
  16. Rather the face of something (someone?) living on the cleaning personel's face. (210x magnification!)