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Panagor 400mm F5.6
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PostPosted: Sat Dec 19, 2020 10:54 am    Post subject: Panagor 400mm F5.6 Reply with quote

For sale on ebay:
https://www.ebay.nl/itm/264982247411



PostPosted: Sat Dec 19, 2020 11:11 am    Post subject: Reply with quote

Interesting. APSC I guess since it is half format. So 800mm. Friends


PostPosted: Sat Dec 19, 2020 12:17 pm    Post subject: Reply with quote

I'm worried about light leaks :p


PostPosted: Sat Dec 19, 2020 4:16 pm    Post subject: Reply with quote

4 elements 3 groups. Quite standard at the time right?


PostPosted: Sat Dec 19, 2020 4:25 pm    Post subject: Reply with quote

lumens pixel wrote:
Interesting. APSC I guess since it is half format. So 800mm. Friends


Laugh 1 Laugh 1


PostPosted: Sat Dec 19, 2020 4:28 pm    Post subject: Reply with quote

blotafton wrote:
4 elements 3 groups. Quite standard at the time right?


I have a few "simple" 400mm and 500mm lenses, and usually I assumed them to be [3/2] constructions: A achromatic dublet as the "main lens", and a slightly negative sinle lens acting as tele / field flattener. It seems that in some cases a more complex construction was used.

Thanks for sharing the image!

S


PostPosted: Sat Dec 19, 2020 6:01 pm    Post subject: Reply with quote

the rear element is also a doublet (look closely) so 5 e/3g.
The common generic 400mm f6.3's are normally two cemented achromats so 4e/2g. The vivitar 400mm varied quite a bit. This panagor is similar to the komine made viv wich is also a 5e design. Pretty good lens IMO - i have one.


PostPosted: Sat Dec 19, 2020 6:15 pm    Post subject: Reply with quote

...

Last edited by Blazer0ne on Tue Feb 22, 2022 6:12 pm; edited 1 time in total


PostPosted: Sat Dec 19, 2020 6:57 pm    Post subject: Reply with quote

Blazer0ne wrote:

Seriously, was this made in one go or did it require reassembly?


As far as I know, producing these "cut lenses" is an art in itself. Not just cutting an entire lens!


PostPosted: Sun Dec 20, 2020 1:39 am    Post subject: Reply with quote

Many years ago I saw an entire Challenger Mk1 tank that had been cut in half like that, apparently they did it with a laser and it took a very long time. It was at the Royal Ordnance Factory in Leeds, not on public display.


PostPosted: Sun Dec 20, 2020 2:27 am    Post subject: Reply with quote

man that lens looks totally flocked


PostPosted: Sun Dec 20, 2020 2:32 am    Post subject: Reply with quote

Concrete saw -- Where's the other half?


PostPosted: Sun Dec 20, 2020 8:24 am    Post subject: Reply with quote

Nice found! Even the tripod collar is cut into halves.


PostPosted: Mon Jan 24, 2022 5:06 pm    Post subject: Reply with quote

I just picked up two of these for a fraction of the price (€20) The only 'drawback' is that they are still attached to each other.'

seller pic:




PostPosted: Tue Jan 25, 2022 10:15 am    Post subject: Reply with quote

How do you split them up? Laugh 1


PostPosted: Tue Jan 25, 2022 10:42 am    Post subject: Reply with quote

I guess I'll have to inform at a water jet cutting facility :p


PostPosted: Tue Jan 25, 2022 12:09 pm    Post subject: Reply with quote

D1N0 wrote:
I just picked up two of these for a fraction of the price (€20) The only 'drawback' is that they are still attached to each other.'

seller pic:




Thank You Dog


PostPosted: Thu Jan 27, 2022 3:08 pm    Post subject: Reply with quote

Sharpening, contrast and CA reduction applied.
Fencekeh 2 by The lens profile, on Flickr


PostPosted: Thu Jan 27, 2022 6:25 pm    Post subject: Reply with quote

The lens that started this topic is still on ebay. A second pic shows the lens diagram more clearly. Both the rear and middle element are doublets. The front is single. So it is a 5/3 design.

blotafton wrote:
4 elements 3 groups. Quite standard at the time right?