Hermagis Eidoscope

[Marko Trebusak]

Marko, you caught me looking the fool, or at least contradicting myself. Several years ago, when I purchased my first Eidoscope I compared the reflections of an Dallmeyer Rapid Rectilinear and the Eidoscope. They both had the same number of reflections, showing that both are 4/2 designs, but the Eidoscope's reflections moved in opposite directions than the RR's, suggesting that the curves are different. Since I know of only two significant 4/2 designs--the RR and the periscopic--I thought that the Eidoscope must be the latter. The Nicola Persheid is a good example of a 4/2 periscopic (a Verito is a 3/2 periscopic), while the Pinkham and Smith Series IV is a 4/2 RR. In retrospect and in face of my conflicting reports I should go back and try the reflection test again.

Jason, did you make lens reflection test? I got my lens and did the spotlight test. I can see bright reflections going faster in the same direction as dim one. So I think it is Aplanat/RR design after all. While swinging the lens, the dim reflection stays almost in the same place, so I guess that cemented surface of both achromats must be almost flat?

Hi
See the attatchment for the catalogue scan its in french.

Thanks Sven for posting this!

Cheers,
Marko

[Steven Tribe]

Just for information! A size no. 4 hergamis Eidoscope has just been listed in sunny Devon (UK) on you know where. At the moment it is spelt Eidescope. I have connection with the lister. He has another, more common, soft lens too.

[Marko Trebusak]

Well, thank you for information Steven. Unfortunatelly I'm not in a position to chase it . But BDW I finally got around to scan my first photo with no. 3.

Marko

[Steven Tribe]

Perhaps not the subject of my choice know that spring has only just melted our snow!
The other soft lens listed is a 3B Dallmeyer.

[Jim Galli]

Well, thank you for information Steven. Unfortunatelly I'm not in a position to chase it . But BDW I finally got around to scan my first photo with no. 3.

Marko

Beautiful Marko.

[Marko Trebusak]

Beautiful Marko.

Thanks Jim. I need to print it to see how character of this lens transform to print of actual size and process.

Cheers,
Marko

[SAShruby]

I got mine first Eidoscope today. It's Berthiot No.3, 275mm/4.5. with custom made extension and som lamel type fabric shutter!!! It's a quite a beautifull work, wood looks to be a mahogany. I just can't wait to make fisrt portrait with it.

I'm so excited!!!

[Hugo Zhang]

Two recent pictures of Hermagis Eidoscope #2 with Kodak 2d and 57 back.

[Dan Dozer]

Here are the first couple of images a couple of months back with my #2 Berthiot Eidoscope. Note that the Berthiot and the Hermagis are the same lens. Apparently, Berthiot took over the Hermagis lenses around 1940 or so and put the Berthiot name on them instead of Hermagis.

The head on shot was at about F8 and the side shot wide open at F4.5

[firestargps]

Wow, good resource, just found it.

I'm considering to get a Hermagis Eidoscope lens No.4 for my 4x5, based on your discussion, No. 4 will be 7 1/2", Anybody know if it can cover 4x5?

Also I found that the aperture of this type lens is scaled something like 5, 6, 7,14, 20..., does this mean the max aperture is f5, how can I change these numbers to modern stops commonly used today, such as f8, f11, f16 etc.

Thx,
firestar