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Eta Praha Etastigmat 75 1.8 ? Any information about the lens
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PostPosted: Thu Sep 02, 2021 6:52 pm    Post subject: Eta Praha Etastigmat 75 1.8 ? Any information about the lens Reply with quote
Eta Praha Etastigmat 75mm 1.8

Who has information about this lens? Urgent please


PostPosted: Thu Sep 02, 2021 7:19 pm    Post subject: Reply with quote
Meopta (Prague) most likely. Rare I guess.


PostPosted: Thu Sep 02, 2021 7:40 pm    Post subject: Reply with quote
Thank you, caspert79!
Is this projection lens?
Meybe who has expiriens with this lens?


PostPosted: Thu Sep 02, 2021 7:56 pm    Post subject: Reply with quote
Its not a Meostigmat? Likely projector lens.


PostPosted: Thu Sep 02, 2021 9:07 pm    Post subject: Reply with quote
caspert79 wrote:
Its not a Meostigmat? Likely projector lens.


I don't now... But it has an aperture, which is not typical for projection lenses


PostPosted: Thu Sep 02, 2021 11:21 pm    Post subject: Reply with quote
https://twitter.com/Con222/status/1243586216634642432


PostPosted: Fri Sep 03, 2021 5:42 am    Post subject: Reply with quote
serkol wrote:
caspert79 wrote:
Its not a Meostigmat? Likely projector lens.


I don't now... But it has an aperture, which is not typical for projection lenses


True. Does it have a mount?


PostPosted: Fri Sep 03, 2021 6:45 am    Post subject: Reply with quote
visualopsins wrote:
https://twitter.com/Con222/status/1243586216634642432


I don't see that Rolling Eyes

caspert79, yes, it has a self-made mount


PostPosted: Fri Sep 03, 2021 7:57 am    Post subject: Re: Eta Praha Etastigmat 75 1.8 ? Any information about the Reply with quote
serkol wrote:
Eta Praha Etastigmat 75mm 1.8

Who has information about this lens? Urgent please


I just searched for ETA Praha.

https://www.etasince1943.com/contact-us/

Probably part of a product made and distributed by ETA with a third party lens rebranded.
EDit3: Not quite, the ETA company was established in 1943 and probably merged after WWII with other companies to what we know as Meopta, communists period. However the ETA brand names were continued for some time. I hit on something else; the Spektarreta, a 3 prism splitter color camera for monochrome film developed in 1939 by another CZ company that merged into Meopta. Ives style of beam splitter cameras that could use a fast lens. On this web page described with a 70mm 2.9 but possibly tried with other lenses in prototypes. Limited production around 1950.
http://camera-wiki.org/wiki/Spektaretta and http://www.fotoburzapraha.cz/ofotografii/muzeum_spektareta.html


A bit too fast for an enlarger lens I guess. Though Friedrich München had a 75mm 1.9 6 elements design. I guess Etastigmat sounds a bit inferiour to 'S' Coronar.


EDit: a Meopta camera relabeled by ETA, https://www.ebay.com/itm/274444175517

EDit2: the owner of this web page must be quite informed on ETA cameras: https://www.ceskefotoaparaty-flexaret.cz/2020/02/28/etareta/

Last edited by Ernst Dinkla on Fri Sep 03, 2021 9:06 am; edited 2 times in total


PostPosted: Fri Sep 03, 2021 8:13 am    Post subject: Re: Eta Praha Etastigmat 75 1.8 ? Any information about the Reply with quote
Ernst Dinkla, thank you.
Yes, you right. Probably that lens for enlarger


PostPosted: Fri Sep 03, 2021 5:11 pm    Post subject: Reply with quote
I remember reading that some of the lenses of the Flexaret were the sharpest of any TLR.


PostPosted: Sat Sep 04, 2021 8:36 am    Post subject: Reply with quote
caspert79 wrote:
I remember reading that some of the lenses of the Flexaret were the sharpest of any TLR.


In the category of Triplet and Tessar TLRs then. I am not aware of a Meopta TLR double gauss lens version like the Planar or Xenotar made by Rollei. Or some Mamiya TLRs, maybe a Gowland with double gauss design lenses


PostPosted: Sat Sep 04, 2021 10:22 am    Post subject: Reply with quote
Ernst Dinkla wrote:
caspert79 wrote:
I remember reading that some of the lenses of the Flexaret were the sharpest of any TLR.


In the category of Triplet and Tessar TLRs then. I am not aware of a Meopta TLR double gauss lens version like the Planar or Xenotar made by Rollei. Or some Mamiya TLRs, maybe a Gowland with double gauss design lenses


Yeah, you are probably right. In the Tessar category.


PostPosted: Thu Sep 09, 2021 8:00 pm    Post subject: Reply with quote
Now i have this lens. First imression - intresting. Maybe low contrast, but i love this type lens.
I don't know about optical formula. But 75/1.8 suggested this no tessar and no triplet

Adaptation is good, helicoid and diaphragm works propertly

изображение_viber_2021-09-02_14-23-32-527 by serkol64, on Flickr

изображение_viber_2021-09-02_14-23-30-499 by serkol64, on Flickr

изображение_viber_2021-09-02_14-23-34-157 by serkol64, on Flickr

On Sigma fp

_FP00719_2048px by serkol64, on Flickr

_FP00686_2048px by serkol64, on Flickr


PostPosted: Thu Sep 09, 2021 8:14 pm    Post subject: Reply with quote
Pretty cool. Nice results!


PostPosted: Thu Sep 09, 2021 8:22 pm    Post subject: Reply with quote
caspert79, thank you!


PostPosted: Thu Sep 09, 2021 11:55 pm    Post subject: Reply with quote
I like it serkol!

Like 1 Like 1 Like 1


PostPosted: Fri Sep 10, 2021 2:26 am    Post subject: Reply with quote
Nothing wrong with lower contrast.

Stuff looks good. Like 1 small


PostPosted: Fri Sep 10, 2021 2:47 am    Post subject: Reply with quote
Like 1 Like 1

Search for "Eta Etareta" on this page https://www.tresbohemes.com/2017/04/a-collection-of-old-czech-cameras/


PostPosted: Fri Sep 10, 2021 6:53 am    Post subject: Reply with quote
Knudsen, tromboads, visualopsins thank you!

_FP00708_2048px by serkol64, on Flickr


PostPosted: Fri Sep 10, 2021 9:56 am    Post subject: Reply with quote
serkol wrote:
Knudsen, tromboads, visualopsins thank you!

_FP00708_2048px by serkol64, on Flickr


Nice images, good transition to the backgrounds.

Odd aperture scale or is that the aperture 'ring' as well? Any idea about the coverage, I do not see light fall off on the FF images, cropped images? You can reach infinity with it? Aperture in between lens groups or at the rear?

On the origins; Meopta made a lot of military equipment too, during WWII and afterwards. Still does. But the labeling related to ETA is confusing then, that was more a label for distribution to consumers as I understand it.


PostPosted: Fri Sep 10, 2021 2:11 pm    Post subject: Re: Eta Praha Etastigmat 75 1.8 ? Any information about the Reply with quote
serkol wrote:
Ernst Dinkla, thank you.
Yes, you right. Probably that lens for enlarger


Honestly doubt that, a f1.8 lens for an enlarger makes not much sense (despite some existing) - wasted efforts based on the needed correction which is difficut to achieve.

Congrats, very nice results you got Serkol!!
Like 1 small Like 1 small Like 1 small


PostPosted: Sat Sep 11, 2021 7:26 am    Post subject: Reply with quote
Ernst Dinkla wrote:


Odd aperture scale or is that the aperture 'ring' as well? Any idea about the coverage, I do not see light fall off on the FF images, cropped images? You can reach infinity with it? Aperture in between lens groups or at the rear?

On the origins; Meopta made a lot of military equipment too, during WWII and afterwards. Still does. But the labeling related to ETA is confusing then, that was more a label for distribution to consumers as I understand it.


Yes, you right, aperture 'ring' is strange. Aperture in between lens groups.
This pictures made with Sigma fp - fullframe mirorless camera, without crop.
Yes, I can reach infinity with it.

I still don't know about sources this lens

kds315* wrote:

Honestly doubt that, a f1.8 lens for an enlarger makes not much sense (despite some existing) - wasted efforts based on the needed correction which is difficut to achieve.



Thank you, Klaus.
Maybe you right too.
Intrigue is keeping Smile))


PostPosted: Tue Sep 14, 2021 7:52 am    Post subject: Reply with quote
_FP00654 bw A25_2048px by serkol64, on Flickr


PostPosted: Mon Sep 20, 2021 5:50 pm    Post subject: Reply with quote
_FP00700_2048px by serkol64, on Flickr
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