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Hello!
The Soviet space lens Lava 3A is covering more than 40 inches. 800 mm f3.5 weight around 65 kg http://mariashin.com/lava/

154940

Thanks, and I'm sorry, my English is not so good to understand all nuances.

Nothing to funny))), I'm glad to help everyone to tests old lenses by shooting cats, dogs, bottles, family members, etc., and sell them for $20, but I can't, the shipping from Russia is too expensive...

If you'll be so kind to tell me, where I can buy VM, I'll be happy to do it, here in Russia no information about old lenses at all. And I promise, will not ask questions here)

yes, I just list it )

P.S.
But slot for diaphragm disc also has a bayonet mount, exactly for additional lens element, I suppose.

Yes, the ring holds the diaphragm disc, but simply by press, without any screw or bayonet.

69571

close-up

69570

here are photos:

69569

just a minute

Thank you Steven! Of course DerogY, I'm so stupid.

Hello!
Has anybody know the French lens maker named DY? The lens is engraved "Brevet d Invention DY Paris". This is a convertible Petzval-type lens, each element mounted by bayonet and the front...

thanks )

Thanks, yes, I'm stupid Satzlinse, of course!

Hello!
I found a double Protar (as I determine) casket set 320+320+250mm, but barrel is engraved: Carls Zeiss Jena Anastigmat-Latxlinse (?) Patent angemeldet
Please look at photo for details.
I've...

Thanks! I found Aero Ektar description and scheme. It's really close to double gauss.

Thanks, it works!!!
If serious, I have no Aero Ektar, just going to buy it. So need to know how the front element works. As I understand this is a tele lens, so the rear group should be a negative...

Hello!
Is the front element of Aero Ektar (cemented doublet and spaced lens) producing any image?
Thanks.

Yes, AD interpretation was great! But if serious, I'm afraid that lens could be modified or collected from different lenses, if the seller is not expert. Any way, thanks all for answers.

Sounds good, if all elements were in the same size in Darlot Petzval lenses. Thanks.

Thanks for the links but they tell about different composition of rear Petzval element.
And we have another formula, so I'm interesting is it original or not?
I have never heard about this lens...

Hello!
Can anybody provide any info for this lens 360307003629 ?
Seller said that rear is cemented doublet and front is 2 air spaced. On the face of it's a classic Petzval lens, but no reason to...

check this one 270591582797 and ask seller for lens design, if it's dialyt it has to be similar to aviar and maybe a nice cheap lens

Due the small distance between front and rear elements, I think that it's a process lens maybe a tessar design, maybe triplet. With coverage 8x10.

Thank you Steven!

Hello!

Is somebody know anything about Elliot London lens manufacturer? I tried google but found EllioTT Bros only. As I can estimate this is RR design.

Thanks for any help.

Photo here: ...

Hello! Is anybody using Componon S 360mm? Can you tell me - do you happy with this lens - sharpness etc.?
Regards, A.

I think the ortho film is sensitive for blue spectrum only thus no green or orange filter is possible.

Great! Many thanks to all! I'll try.

P.S.

has somebody the real experience?

My idea was the same but at the last minute I have begun to doubt.

I just try to understand is it worth to use 80B because it takes 2-3 stops but effect can be unvisible.

P.S.
I need to make skin more dark but have only 80B right now.

Thank you for answer! But can you explain why not? I understand that effect with 80B will be some smoother than with #47 but any way it'll have to be, I think.

Hello! Is somebody use a 80B conversion filter in BW? How do you think it'll be like a usual blue filter or another result? Thanks!

I thought a lot and decided that Planistigmat Phos by design is like Double-Protar Zeiss.
http://www.cameraeccentric.com/html/info/zeiss/p33.html

Hello Darren! Of course I can - here is.

Found some interesting information:

It appears, Alexander Ginsberg was married to Carl Zeiss daughter, that's why he had access to Zeiss lens design and patents.

Thanks Tim! I'll try to write to Seth.