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Carl Zeiss Jena Projektionsobjektiv 2.1/200mm
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PostPosted: Fri May 05, 2017 6:28 am    Post subject: Carl Zeiss Jena Projektionsobjektiv 2.1/200mm Reply with quote

Got that big lens cheaply, claimed by seller to have fungus, but was only haze and some coating spots, cleaned it up in just 20 mins.

Anyone using it here? ZoneV (Markus)??

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PostPosted: Fri May 05, 2017 7:26 am    Post subject: Reply with quote

Looks like a heavy light cannon!?
Not easy to handle I suppose.


PostPosted: Fri May 05, 2017 7:33 am    Post subject: Reply with quote

Hi
this is a 4 lens/2 element projector lens for Format 28x24, usable for APS sensors, quite sharp in center but falling off towards the edges.
You can unscrew the front element and try to get rid of the fungus.
best
Georg


PostPosted: Fri May 05, 2017 8:11 am    Post subject: Reply with quote

carlzeissjena wrote:
Hi
this is a 4 lens/2 element projector lens for Format 28x24, usable for APS sensors, quite sharp in center but falling off towards the edges.
You can unscrew the front element and try to get rid of the fungus.
best
Georg


Hi Georg, nice to hear again from a (Zeiss) specialist like you! Wink

So it is a PETZVAL design I guess. Saw while cleaning that the front
element is a glued achromate and the rear is a group of two free
standing lens elements - a classic Petzval IMHO



PostPosted: Fri May 05, 2017 8:11 am    Post subject: Reply with quote

Minolfan wrote:
Looks like a heavy light cannon!?
Not easy to handle I suppose.


I have to make a clamp tripod holder for it I guess Wink
No too bad at 1.5 kilos, I have some up to three kg.


PostPosted: Fri May 05, 2017 8:23 am    Post subject: Reply with quote

Yes I have this lens since some time. Have used it only for few images, other lenses with about the same technical data (focal length, f-stop, ~design type) I like more.
But I am quite happy that those old simple designs for such fast focal lenses are still usefull on digital cameras - one does not need 10 lens elements for good images Smile

The 1.5 kg feels easy for me as well, I work a lot with heavier lenses.


PostPosted: Fri May 05, 2017 3:31 pm    Post subject: Reply with quote

Hi Kd

yes, however the lenses of this type I had opened had a cemented group at the rear end, which would still qualify as a Petzval design.

Best regards
Georg

BTW there was a typo error in my previous message .... should read 18x24.


PostPosted: Fri May 05, 2017 4:13 pm    Post subject: Reply with quote

Thanks guys!

Markus, which lenses do you prefer over this one?


PostPosted: Sun May 07, 2017 10:43 pm    Post subject: Reply with quote

A few test shots done with the cleaned lens using my well known targets ...


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CA actually less than expected, sharpness as expected (not VISIONAR level of course). Less blurriness in corners though (but using a mft camera, Pana GH4)

Quite useful for portraits at medium distances I guess...but a bit odd to handle due to its length.


PostPosted: Mon May 08, 2017 6:30 am    Post subject: Reply with quote

kds315* wrote:
Thanks guys!

Markus, which lenses do you prefer over this one?


For example my Visionar 183mm/1.9 or my rare ROW Kameraobjektiv 200mm/1.9.


PostPosted: Mon May 08, 2017 6:41 am    Post subject: Reply with quote

Guten Morgen zusammen,

mit einem leichten Gelbfilter (Y1) läßt sich der CA noch weiter unterdrücken und die Kamera kommt im
White Balance immer noch auch Weiss/Neutral, Lichtverlust Faktor 1,2x mit Y1 also praktisch nichts.

Die 3rd Party Stativschelle für Canon mit 76mmm ID passt gut auf den Tubus, man kann dann in etwa
ausbalanciert arbeiten, siehe anbei in Chile das Set-up und den Tarantula Nebel mit diesem 2,1/200
single shot mit der Sony Nex.

Durch nur 4 Glas Luft Flächen hat die Optik etwas höheren Kontrast als die Visionare mit 12 Glas Luft Flächen,
also durchaus eine Alternative wenn es nicht auf Randschärfe bis in die Ecken ankommt.


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[url=http://forum.mflenses.com/userpix/20175/big_5954_IMG_6531_at_comp_1.jpg][img]http://forum.mflenses.com/userpix/20175/5954_IMG_6531_at_comp_1.jpg[/img][/url]

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[url=http://forum.mflenses.com/userpix/20175/big_5954_WP_20161030_00_52_53_Rich_3.jpg][img]http://forum.mflenses.com/userpix/20175/5954_WP_20161030_00_52_53_Rich_3.jpg[/img][/url]


PostPosted: Mon May 08, 2017 7:04 am    Post subject: Reply with quote

Thanks Markus und Danke Georg auch für den Tip mit der Stativschelle!

(ich weiss momentan noch nicht warum sich die Bilder nicht laden lassen...)


PostPosted: Mon May 08, 2017 5:37 pm    Post subject: Reply with quote

hmm, hab die Bilder mal hier reinkopiert, hier gehts...

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PostPosted: Mon May 08, 2017 6:25 pm    Post subject: Reply with quote

Hallo Klaus

danke fürs Nachladen.

Der Tarantula Nebel shot ist ein ca. 50% Crop um die unscharfen Sterne / wegen Koma in den Ecken weg zu bekommen

Gruss
Georg :1lg)


PostPosted: Mon May 08, 2017 6:28 pm    Post subject: Reply with quote

carlzeissjena wrote:
Hallo Klaus

danke fürs Nachladen.

Der Tarantula Nebel shot ist ein ca. 50% Crop um die unscharfen Sterne / wegen Koma in den Ecken weg zu bekommen

Gruss
Georg Laugh 1


Gerne. Hätte ich nicht gedacht, dass man mit einem nur 200mm Objektiv das sichtbar machen kann!!
***
Most welcome. I would not have thought that a just 200mm lens would be able to make that visible!


PostPosted: Mon May 08, 2017 10:16 pm    Post subject: Reply with quote

....bei der Lichtstaerke 2.1 kein Problem, der APS Sensor plus Crop macht dann KB Vollformat equivalent ca. 400-450 mm.
Clear skies
Georg


PostPosted: Tue Sep 12, 2017 4:48 am    Post subject: Reply with quote

Hi all you good people, I got this gun a month ago and love it very much, still no sessions, just some test shots. Very promising and lighter than the most of the rest 25 lenses I bought recently (looks like the russians really knows how to build tanks).

I think to build some universal focusing setups, based on macro rails instead of helicoids. The cheap chinese ones are not extremely good (oil outside, loose) and not much sizes available, especially the big sized. Thread adaptes not available too... So at least I will try the rail idea.

Klaus, please which model is your collar? I see it fits perfectly.

Cheerz!


PostPosted: Tue Sep 12, 2017 8:41 am    Post subject: Reply with quote

baychlen wrote:
Hi all you good people, I got this gun a month ago and love it very much, still no sessions, just some test shots. Very promising and lighter than the most of the rest 25 lenses I bought recently (looks like the russians really knows how to build tanks).

I think to build some universal focusing setups, based on macro rails instead of helicoids. The cheap chinese ones are not extremely good (oil outside, loose) and not much sizes available, especially the big sized. Thread adaptes not available too... So at least I will try the rail idea.

Klaus, please which model is your collar? I see it fits perfectly.

Cheerz!


Not mine, this pictures belong to our member Georg. I have asked him about it...


PostPosted: Tue Sep 12, 2017 11:48 am    Post subject: Reply with quote

kds315* wrote:
hmm, hab die Bilder mal hier reinkopiert, hier gehts...

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Fantastic! Thank you for sharing, must try this.


PostPosted: Wed Sep 13, 2017 6:34 pm    Post subject: Reply with quote

baychlen wrote:
Hi all you good people, I got this gun a month ago and love it very much, still no sessions, just some test shots. Very promising and lighter than the most of the rest 25 lenses I bought recently (looks like the russians really knows how to build tanks).

I think to build some universal focusing setups, based on macro rails instead of helicoids. The cheap chinese ones are not extremely good (oil outside, loose) and not much sizes available, especially the big sized. Thread adaptes not available too... So at least I will try the rail idea.

Klaus, please which model is your collar? I see it fits perfectly.

Cheerz!


Georg answered me, he uses the original CANON collar Type B


PostPosted: Thu Sep 14, 2017 1:16 pm    Post subject: Reply with quote

Thankx! I have purchased in between some different, still waiting them, I believed I can fit the lens 80mm diameter with some 1mm bold insider ring as filler, so at first time I will have 82mm for the Kipronar. Use of 78mm makes more sence, but I did not knew the last week which sizes exists (ebay shows 66 and 82 mostly). I purchased some 66s for the 62.5 lenses. Here I found this ¨in details¨ info, after your answer:
https://photo.stackexchange.com/questions/3453/what-are-the-different-canon-tripod-mount-ring-types-for

The different types are:

Tripod Mount Ring A (W) or A II (W) [hinge] for 70-200mm f/4 L (for both IS & non-IS versions), 300mm f/4 L, 400mm f/5.6 L,
Tripod Mount Ring A (B) or A II (B)[hinge] for 200mm f/2.8 L, 200mm f/2.8 L II, 80-200mm 2.8 L
Tripod Mount Ring B (W) [no hinge] for 70-200mm f/2.8 L (IS, non-IS, IS II), 100-400mm f4.5-5.6 L, 300mm f/4 L IS
Tripod Mount Ring B (B) [no hinge*] for 100mm f/2.8 Macro, 180mm f/3.5 L Macro & MP-E 65mm f/2.8 Macro
Tripod Mount Ring C (W) [hinge] for for 70-300mm f/4.5-5.6 L IS, 28-300mm f/3.5-5.6 L IS
Tripod Mount Ring D [hinge] for 100mm F2.8 L IS Macro Lens

The interior ring dimension for each are (note well they do not go "in order"):

Tripod Mount Ring A 65-66mm
Tripod Mount Ring B 78mm
Tripod Mount Ring C 82mm
Tripod Mount Ring D 68-72mm



Im not sure the collars will be my solution for the heavier lenses, nor the helicoids be my focusing system. Some things seems to be very custom, so bellows or universal screwing tubes (as well as universal lens support and tripod). Im not a mechanical engineer, so all this shall be very simpe as design and not so light in weight. The macro rails idea in general will be with fixed lens-tripod and the camera will be the moving part. The both variants are not about cutting the lens, and without the helicoids the infinity shallbe easier or closer to achieve. I dont care however about the infinity so much, as I like to shoot portraits and my daughter is after the macros. Still no time to complete the constructions, its my second month into MF things. Soon I hope to share some reverse engineering.

CH