Two new additions to the Zeiss gang (1 Viewer)

[Ignatius]

1. A 1984 Deltrintem
T3M multi-layer coatings. No idea whether these are also 'fully' multi-coated, but allbinos measured 92% transmission. I like the clear sharp image. The sweet spot is smaller than on 8x30 Habichts, but I think I am going to enjoy these quite a lot. (Sadly, the Zeiss yellow filters I have do not fit. They are loose.)



2. A Turmon
No serial number, ergo no date. Turmons were made from 1920 to 1940 and again from late 1949 to 1990. According to Mr. Seeger's green book, in the workshop lists there are Turmon serial numbers until 1987, so this one will have been made some time in the last three production years. (Both Docter Optic and Noblex, the two CZJ successors [1991-97 and 2016-, respectively], continued offering the Turmon, as did Zeiss West, whose version never entered commercial production in the 1950s. Currently the Turmon is not in production.)
Mine has the 1Q designation, so most likely for export and came with the original carboard box, but not the pouch. Looking at the lenses the optics appear to be coated, but I cannot say whether single or multi-coated (post 1978 CZJ used the T3M multi-coating). One strange thing is that I can focus it to 1 m and out to about 10 m, but not to infinity. I dismantled it and found that the ocular lens assembly just cannot be physically screwed into the ocular tube far enough to focus at infinity. No idea whether that is par for the course. Mechanically there seems to be nothing wrong with it.

 

[Hermann]

2. A Turmon
No serial number, ergo no date. Turmons were made from 1920 to 1940 and again from late 1949 to 1990. According to Mr. Seeger's green book, in the workshop lists there are Turmon serial numbers until 1987, so this one will have been made some time in the last three production years. (Both Docter Optic and Noblex, the two CZJ successors [1991-97 and 2016-, respectively], continued offering the Turmon, as did Zeiss West, whose version never entered commercial production in the 1950s. Currently the Turmon is not in production.)

You know Albrecht Köhler's website, don't you? He's got some useful information about the Turmon: Fernoptik A very useful website IMO.

Mine has the 1Q designation, so most likely for export and came with the original carboard box, but not the pouch. Looking at the lenses the optics appear to be coated, but I cannot say whether single or multi-coated (post 1978 CZJ used the T3M multi-coating).

I bought mine in 1990, in the Zeiss shop in Leipzig, complete with all the accessories they had (including four ancillary lenses and a simple microscope stand). Looks like your Turmon, actually. No serial number. Mine has got the T3M coating on the objective, and the (older) bluish coating on the eyepiece.

One strange thing is that I can focus it to 1 m and out to about 10 m, but not to infinity. I dismantled it and found that the ocular lens assembly just cannot be physically screwed into the ocular tube far enough to focus at infinity. No idea whether that is par for the course. Mechanically there seems to be nothing wrong with it.

Well, there must be something wrong with it. Mine focuses to infinity no problem.

Hermann

 

[Ignatius]

You know Albrecht Köhler's website, don't you? He's got some useful information about the Turmon: Fernoptik A very useful website IMO.

I bought mine in 1990, in the Zeiss shop in Leipzig, complete with all the accessories they had (including four ancillary lenses and a simple microscope stand). Looks like your Turmon, actually. No serial number. Mine has got the T3M coating on the objective, and the (older) bluish coating on the eyepiece.

Well, there must be something wrong with it. Mine focuses to infinity no problem.

Hermann

Hi. Yes, I know Mr. Köhler's website. In fact I translated one of his articles recently to be able to give his information about yellowish images in binoculars here recently.

Regarding the focussing issue:
As mentioned I disassembled the Turmon. At the bottom of the ocular tube there is a brass ring brazed into the tube. It appears to act as a stop for the ocular assembly, which screws down into the tube via a helix.





When I screw the ocular into the tube as far as it will go (not quite infinity) and then fix the eyepiece in place at -15 on the scale, and then screw the ocular out to close focus, it should go as far as +30. However, it only goes as far as +14.





According to spex the range is -15 dpt to +30 dpt.

Re. the Deltrintem: I believe I am learning what veiling glare is. But I still like it. The T3M coatings reflect reddish.

 

[Ignatius]

To clarify:

When the ocular assembly is screwed in as far as it will go, the Turmon focusses at ca. 10 metres. One can then slowly turn it out and it progressively focusses closer until it stops at around 1 metre. The close focus is as per spex, but the far focus is obviously
There must be someone here among all those optics specialists peering into eyepieces at odd angles to discover 'problems', who knows what the issue is in this real life case.

PS. The Mrs. took a look as well. She has eagle eyes and she confirmed my assessment: max distance focus is ca. 15metres. Both her and my eyes normally have a diopter setting of Zero (0) on our binoculars.
So either I book this Turmon under shitty fleabay purchase where none of the local optical luminaries knows what's wrong, or it is indeed my first, and so far only, crappy Zeiss.

PPS. I just checked the prescription for my computer goggles: +0.75 in both eyes. But in real life I neither wear glasses nor do I need to set diopters at anything other than 0. So it's not our eyes.

There must be something wrong with the Turmon, as @Hermann pointed out, but what is it.

Here is the blighter in parts. The small prism has a +1 on it, the large one a -3. Both are seated without any adjustment screws, held by glue, which has come undone for the big one, and metal clips. The covers are plastic made to look like leather on the outside.

 

[Thotmosis]

Nice minimalistic setup, good find!

 

[Patudo]

Re. the Deltrintem: I believe I am learning what veiling glare is. But I still like it.

Unfortunately all the classic 8x30s I've tried have not been great in this department. Interesting to own, but I don't use them if performance against glare is important.

 

[Ignatius]

Unfortunately all the classic 8x30s I've tried have not been great in this department. Interesting to own, but I don't use them if performance against glare is important.

I cannot remember who it was on here, who said that the later CZJs had multi-layer coatings but to make up for that the baffling in the objective tubes was shiny. I compared the '84 Deltrintems to the '57 Silvarems this morning and found this to be true. The Mrs even went so far as to say that she thought the image of the 6x30s was generally nicer and better, period. It being Thursday and le weekend approaching fast, I did not contest her pov.
Still, I do like the Deltrintems and I now cannot wait til I have an 8x30 Habicht again for a direct comparison.

 

[Hermann]

Still, I do like the Deltrintems and I now cannot wait til I have an 8x30 Habicht again for a direct comparison.

If the Habicht is recent, I can tell you what the result will be: The Deltrintems will have a nicer FOV and a smoother focuser. Sharpness in the image centre will be on a similar level. Other than that the Habicht will be better in all departments.

Hermann

 

[Ignatius]

I have now removed the brass ring visible in the first pic in post #3, and lo and behold - I am able to focus the little Turmon at infinity. It won't become my go-to optic, but it is fun now that it works.