Aero Ektar 343mm / 13.5" / F3.5 Info

I will happily take one!

The threads of the 12" and 24" Aero-Ektars are the same. (I still haven't freed the front cell of the 24" Extar to measure spacing)

Fairchild made the shutters, so B&L and Kodak would have had to make all their lens cells to fit. My 12" f/2.5 is in a "Night Photo Shutter" which does not have an adjustable aperture, it is always wide open.

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Originally Posted by Mark Sampson

It's quite possible that both companies were working to the same contract, or identical contracts, in order to produce the numbers of lenses needed. In 1942 they were in a hurry for optics like these (among other things). (In those days, Kodak's optics plant, Hawk-Eye, was just a mile down the street from the B&L factories, btw.)

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Same as mine. I am having SK Grimes make waterhouse stops for it.

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Originally Posted by Jason Greenberg Motamedi

I will happily take one!

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Originally Posted by Tracy Storer

Fairchild made the shutters, so B&L and Kodak would have had to make all their lens cells to fit. My 12" f/2.5 is in a "Night Photo Shutter" which does not have an adjustable aperture, it is always wide open.

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I took a measurement of my 12" / F2.5 as well (recently acquired) and the barrel length appears to be the same as previously stated here. I came across a post where people were arguing that the 12" weighs in at 40 lbs. I can assure you that it does not. I think once barreled it may clock in at 17 lbs give or take depending on material used.

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Attachment 247115

IIRC, the lens cells together weigh 10lbs and the shutter weighs 8lbs. When I make a new aluminum barrel I'm sure it will weight less and be less bulky(which is the real goal).

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Originally Posted by brandonium

I took a measurement of my 12" / F2.5 as well (recently acquired) and the barrel length appears to be the same as previously stated here. I came across a post where people were arguing that the 12" weighs in at 40 lbs. I can assure you that it does not. I think once barreled it may clock in at 17 lbs give or take depending on material used.

Attachment 247114
Attachment 247115

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I like heavy lenses, as I have several

love the one you are with

I was promiscuous

once upon a time

'The Weight"

https://www.youtube.com/watch?v=XciJsGeboos

I have nothing to add but to say: what a story!