8 D+ h2 y- j  Qwww.astroview.com.cnYesterday I took a trip to the Deutsches Technikmuseum Berlin, an oddity of a place containing all manner of weird and wonderful German technology, from a yard full of locomotives to an exhibition on cutlery and plates from railway dining cars. Unlike many science museums, the DTB doesn't have a whole lot of interactive exhibits -- just a few push buttons here and there -- but that doesn't mean it wasn't full of screaming kids on a Sunday.
6 n$ v( f* w- r# N5 t$ T& x# V天文论坛,天文,望远镜,天文望远镜,apo,ed,televue,tv,tmb,高桥,ap,tec,望远镜评测，望远镜测评,双筒望远镜，天顶，目镜，望远镜配件，赤道仪What it does have, though, is an amazing collection of historical German camera gear. The exhibit is full of retro gadgets, as you'll see below, but the most interesting to me were the bisected lenses and cameras, the insides of which show the precision of a CAD drawing. Read on to see sawn-off gadgets, the origin of digital cameras and a secret doorway just for horses.
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/ I) {9 k3 a# b天文论坛,天文,望远镜,天文望远镜,apo,ed,televue,tv,tmb,高桥,ap,tec,望远镜评测，望远镜测评,双筒望远镜，天顶，目镜，望远镜配件，赤道仪This is a lens from Leitz, made for Leica rangefinder cameras. You can see the lens elements, which look a little rough due to having been sliced in half. The amazing thing here, though, is the mechanical wizardry going on inside. This lens is from the thirties (or so my badly scribbled notes tell me), and contains an astounding amount of intricate machining, more akin to a watch than a lens. While there were no modern versions on display, I would expect that a Leica lens looks much the same today.

5 R1 H( n1 T- R7 t& V/ F7 P天文论坛,天文,望远镜,天文望远镜,apo,ed,televue,tv,tmb,高桥,ap,tec,望远镜评测，望远镜测评,双筒望远镜，天顶，目镜，望远镜配件，赤道仪Here's another. Bigger and simpler. I think this is an SLR lens.
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One more, and I think it's another Leica (the font on the ƒ-stop scale looks familiar). Check out the huge block of glass second from the top: It's a wonder any light gets through to the film.

国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材( b/ s5 {6 r' v. g
This exhibit shows lots of manly long lenses, and -- with the shots of footballers in the background -- the glass was almost steaming up with testosterone. I'm not sure which one I like best. In terms of utility, I'd pick the third from the right, which looks like it would double as a handy bludgeoning tool if I were ever caught snapping through my neighbor's window.国内专业的天文望远镜器材评测和交流论坛，致力于如高桥、televue、tmb、ap、tec等顶级望远镜和附属器材" @4 M/ ?- X" w7 t6 M9 r# a  M/ W

# n- x2 m: |& v. j! ], T天文家园欢迎您！The last internal shot, this one shows the leaf shutter for a 1932 Voigtlander Bessa. Instead of the focal plane shutter we're used to these days, the leaf shutter is actually inside the lens. They don't give such high speeds as a focal plane shutter, but they have one big advantage: Because they open all the way up, you can use a flash at any speed.
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% W8 k% k6 m& ]: B; Y' M天文论坛,天文,望远镜,天文望远镜,apo,ed,televue,tv,tmb,高桥,ap,tec,望远镜评测，望远镜测评,双筒望远镜，天顶，目镜，望远镜配件，赤道仪This is Agfa's ePhoto 1280, an early attempt at a digicam. The camera, made in 1997, shows just how far we have come in a decade. These are the specifications, cribbed from the excellent DP Review: 0.7 Megapixels (1024 x 768), maximum 1/500 sec shutter speed, ƒ2.8 maximum aperture (actually better than a lot of cameras today), a 38-114 mm (3x) zoom and a 2" LCD. The 1280 (the name I think comes from the maximum interpolated resolution of interpolated: 1280 x 960 pixels) shipped with a SmartMedia memory card boasting a huge 4 Megabytes. I guess some things haven't changed.
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Lastly, this is the door at the end of the corridor. "Stairs for Horses." WTF? I tried the door and it was locked, so we'll never get to meet the equine gadget-fiends that might use this exclusive entrance.

第一个图片里是一个很经典的双高斯镜头,估计是个标头.

果然。。。。。

哈苏的镜鉴快门机构。。。。见识了

哈哈 不错 见过真的拆开的

第一个是nikon的E 50/1.8，我放抽屉里快3年了