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Old May 16th, 2012, 06:29 AM
StuartRae StuartRae is offline
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Default 220 fisheye

Nikkor 6mm 220-degree fisheye lens
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Old May 16th, 2012, 07:17 AM
Bart_van_der_Wolf Bart_van_der_Wolf is offline
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Originally Posted by StuartRae View Post
Hi Stuart,

Now that's an impressive piece of glass, try keeping you feet out of the image ..., it's impossible unless it's pointed upwards.

Cheers,
Bart
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Old May 16th, 2012, 08:26 AM
Asher Kelman Asher Kelman is online now
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Quote:
Originally Posted by Bart_van_der_Wolf View Post
Hi Stuart,

Now that's an impressive piece of glass, try keeping you feet out of the image ..., it's impossible unless it's pointed upwards.

Cheers,
Bart




Daily Mail: 6mm Nikon Fisheye ~1972


"Impressive" you say? It's damn overwhelming!

But where are the photographs tasked with it?

Asher
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Old May 16th, 2012, 10:33 AM
Mark Hampton Mark Hampton is offline
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Daily Mail: 6mm Nikon Fisheye ~1972


"Impressive" you say? It's damn overwhelming!

But where are the photographs tasked with it?

Asher
Can someone explain how it can shoot behind its self?

cheers
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Old May 17th, 2012, 02:07 AM
Bart_van_der_Wolf Bart_van_der_Wolf is offline
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Can someone explain how it can shoot behind its self?
Hi Mark,

Well not literally straight behind itself, but wider than 180 degrees. I assume that the front element has an extremely short radius of the inner surface and a large radius of the outer surface. That creates a thin lens on the optical axis and thick towards the edges. Refraction does the rest. Maybe somebody can dig up a diagram of this lens somewhere to illustrate the principle.

Cheers,
Bart

P.S. I've found sort of a diagram:
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Old May 18th, 2012, 04:11 PM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
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I had that one, but sold it later for a good price. Darn big and heavy monster lens :biggrin:

Read what my friend Macro Cavina has written about Nikon fisheyes (incl. prototypes of them) HERE on his site

This link explains the principle of operation very well, including this picture of teh 2.8/6mm function:



and here an image shot with it:


(c) Kubetschek.de
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