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View Full Version : Kodak Aero-Ektar 12 inches f2.5 yellow blue dots + Carl Meyer conversion



renditiont
2-Sep-2017, 18:45
I bought myself a decent Aero-Ektar 12 inches f2.5 not so long ago (#RM168) on that site, and it came with yellow and blue dots. I know the yellow and purple dots are quite common but I still could not find exactly what blue dot meant for. If any of you wonderful folks knows what blue dot means then please let me know.

Anyway I figured the shutter housing that it came with is bulky, so I decided to convert it to an aperture one . I have been having this idea of a Carl Meyer conversion for about two years now, and I have been sitting on the idea, but I did not find a cheap AE12 to test it on. For you guys did not know, Carl Meyer (Burk & James) outsourced the lenses and rehoused quite a lot, including re-housed AE 7 inches f2.5 and AE 12 inches f2.5 and called them Carl Meyer 7 inches f2.5 or Carl Meyer 12 inches f2.5 with aperture ring. I stumbled upon a Carl Meyer version of AE12 a few years ago on that site, but I missed out on getting it. The lens also shed down some weight.
Anyway here is the original lens in its housing glory

https://c1.staticflickr.com/5/4432/36802442226_174a44289d_o.jpg

https://c1.staticflickr.com/5/4391/36990273025_639a4ee1ec_o.jpg

After the conversion

https://c1.staticflickr.com/5/4346/36802442176_58469c899a_c.jpg


https://c1.staticflickr.com/5/4430/36802442016_cc37c755c6_b.jpg

Currently the lens is getting LED Growlight treatment to bleach the yellowing

Mark Sawyer
2-Sep-2017, 23:42
Different colored dots indicate different coatings, but it's proprietary information that manufacturers played close to the vest...

Jason Greenberg Motamedi
3-Sep-2017, 09:08
As far as I know, the 12" f2.5 Kodak Aero-Ektar should fit directly into the barrel of the (sometimes cheaper) 343mm f3.5 Eastman Anastigmat. These are sometimes branded as a Kodak Aero-Ektar. This might be one way of finding a barrel for your lens. Finding a camera that than hold the beast might be a greater challenge.

renditiont
3-Sep-2017, 10:54
As far as I know, the 12" f2.5 Kodak Aero-Ektar should fit directly into the barrel of the (sometimes cheaper) 343mm f3.5 Eastman Anastigmat. These are sometimes branded as a Kodak Aero-Ektar. This might be one way of finding a barrel for your lens. Finding a camera that than hold the beast might be a greater challenge.

You nailed it on the head regarding the barrel and aperture for the lens. Both AE12 and Kodak Anastigmat 13.5 inches lenses have exact same thread. I think this is what Carl Meyer did in the days too aside from making their barrel/aperture. It should do well with board that is larger than 6x6.

renditiont
3-Sep-2017, 12:54
FYI here is my modded AE12 f2.5 . Note the arrows went past f/3.5 .

Here are what I know so far regarding Carl Meyer re-branding:

Carl Meyer 7 inches f2.5 = re-brand AE 7 inches f2.5
Carl Meyer 12 inches f2.5 = re-brand AE 12 inches f2.5
Carl Meyer 5 inches f2 = re-brand Gottingen Xenon 5 inches f2
Carl Meyer Video-Stigmat 200mm f2.9 = re-brand Dallmeyer Pentac 200mm f2.9

these guys probably re-branded many more fast lenses...

https://c1.staticflickr.com/5/4411/36836318752_051c101be0_z.jpg

and here is Carl Meyer's version

https://c1.staticflickr.com/5/4416/36836318632_d5922a57d8_z.jpg

Mark Sawyer
3-Sep-2017, 14:42
BTW, for those who don't know, "Carl Meyer" was the Burke & James "house brand" for many lenses. Some were pre-WWII German Goerz lenses (B&J bought Goerz in 1927), some were post-war German lenses supposedly assembled from huge lots of miscellaneous cells and elements, some were re-worked old lenses or new lenses made under contract for B&J by other makers...

I have a couple that are fine, but there are stories that the quality is quite variable. The story behind the "Carl Meyer" name is also variable; some say it's a blend of Carl Zeiss and Hugo Meyer, two very respected names in photographic optics. Others say it's the name of George Drucker's (President of B&J) wife's gynecologist.

pierre506
3-Sep-2017, 16:25
Using more larger lenses is not a problem for me any more, Jason.https://uploads.tapatalk-cdn.com/20170903/3d59ed42d91551b377d9e79eb4784909.jpg

通过我的 MHA-AL00 上的 Tapatalk发言

renditiont
3-Sep-2017, 19:49
Yeah, mounting is the least of my concerns. I collected a few decently fast ones for 8x10 over two years period as well. Some of mine 323mm f/2.3, Hektor 300mm f2.8, AE12 f2.5, chinese 340/2.4, Kodak Anastigmat/AE 341mm f3.5
https://c1.staticflickr.com/5/4416/36872978611_dcf4e83e06_c.jpg