Lenses as big around as your head!

[William Whitaker]

I had to ask...

[goamules]

I'm thinking of making a camera obscura out of my bathroom. That way when I go in there, it will be like being outside!

http://tmagazine.blogs.nytimes.com/2...o-morell/?_r=0

[Roger Hesketh]

Come on, the above are just for girls. Now meet a real man-of-war. Younger, bigger, sharper (well into infrared), and with some real not a salony history (WWII included perhaps).

Sorry no heads for comparison as no helmets were at hand . And the scale is in cm, but there are plenty of them...

I had one of these. A Zeiss Telikon 750mm f 6.3. I had it for years but could not find a use for it due to it's weight so sold it earlier this year. It weighs about 11kg. According to the Lens collectors Vade Mecum their weight was also a problem for the ME109s that carried them.

Mine was T coated and the Serial number dated it to around 1942.

Apparently it is quite common for even high quality lenses to differ from their nominal focal length by sometimes up to 5% of their focal length. The focal length of these Telikon's was correct to within 0.1mm such was the precision of their construction.

I have a 30 inch F5.6 Dallmeyer Mounted in an aluminium focusing mount. Despite being half a stop faster. It is half the weight.

[maurits]

Congrats Garrett. Impressive!

BTW, did I guess right?

[eddie]

are you sure? it does not look big enough for 1200mm.....that is 48 inches right? what is it like f9? are you sure al the glass is present? does it focus?.....nicely? how tall is really? what is the real diameter in inches not head size.

[Taija71A]

A couple more, so you can start guessing what it is...

____


Interesting Thread! But Why Guess???


On 08-22-2013, 09:23 AM... The 'OP' Posted:

>> I have acquired a Hermagis Aplanatique that is 1200mm or 47 inch focal length. Other than turning my living room into a camera obscura, what format would this cover, if they even made film larger than 20x24? I'm roughly guessing it would cover 40x40?


http://www.apug.org/forums/archive/i.../t-122141.html




--
Best,

-Tim.
________

[goamules]

Congrats Garrett. Impressive!

BTW, did I guess right?

Yes, you were correct Maurits. Thanks for the help figuring out what it was before I got it. To the rest, yes, it's 47" focal length, and very sharp. Why let you try to guess what it is on this forum when I posted more specific questions on another? For fun of course! You had fun....didn't you?

[goamules]

For the more inquiring minds, I'll give more on the measurements when I get back....sitting in an airport right now (with another lens in my carry on!)

[DarkroomDan]

Lenses as big around as your head!

Stetson makes lens caps for these

[goamules]

Back to inspecting this lens. Here it is next to a "little" 13" Vitax for scale.



Thanks to my friend Fabrice for sending a page (in french) about them, with a picture of one like mine that translates:

"Some hermagis lenses are simply engraved "Aplanetiques". It seems that it only means "spheric aberation free" without any reference to an optical formula type like rectilinear..."
(JL Pricelle book section on Hermagis)

Note the engraving 120 Centimeters.