For Sale 8x10 " conversion durst 138s / G139

[claudius]

hi richard
thank you for your interess.
you are on the list
i will return when its ready.
klaus

 

[sculptorBradP]

Would this lens work on a Durst 138 S / G139 with the 8x10 Head -
Jos. Schneider & Co. Optical works / Kreuznach 2, Prototyp Schneider-Kreuznach Componon Tele Xenar, f: 4,5 / F: 240mm., Normalkorper - mount – shutter, nbr. of. Lens : #7107320, nbr. Of. Shutter: Rb362
Telephoto Lens, Screw thread 74mm, Prime Lens, Manual focus, Product weight: 784g, Type: Fixed focal length, Unique!!! for collectors!
from a collection:
Response from the seller is that the lens is Front side thread is 62mm, Rear thread is around 72 mm. Also from another seller, a fabricator for new Durst Lapla plate to use with a Durst 138 S - Thread should be designated by major diameter and pitch. Commonly used pitch for 72mm diameter is 0.75mm, but this is not guaranteed. We can make such plate, but will not accept return if it does not fit. - thanks, - Brad

 

[claudius]

hi brad
i would not go for it, after all it is a tele lens that usually have a narrow field of view.
go for a std enlarger lens or process like g-claron 240 or gerogon 240.
dont worry about the larger f number (f 9 ) you get plenty of light from the kit.

 

[sculptorBradP]

hi brad
i would not go for it, after all it is a tele lens that usually have a narrow field of view.
go for a std enlarger lens or process like g-claron 240 or gerogon 240.
dont worry about the larger f number (f 9 ) you get plenty of light from the kit.

Thank you for your response, Klaus. I actually didn't realize that the Rb362 indicated a shutter until after I looked more carefully at the accompanied picture of the posted item next to an old box that it was originally packed in. I added that info from the box on an edit here with my question after I had initially posted. I am the proud owner of this lens now though. It's in transit from Germany. So, perhaps it will prove useful as a lens for photos of my traditional charcoal figure drawings - generally 18 inch x 30 inch or so. Or maybe a good lens for another use on my 4x5, or 8x10 view camera of my sculpture photos?, I will follow your advice and look for a std enlarger lens or process like g-claron 240 or gerogon 240. Thanks, - Brad

 

[sculptorBradP]

I received the lens - it's just a f 4.5 / 240mm Schneider Componon lens nbr. of. Lens : #7107320 . It's about the same rear thread dimension 74mm or so - quite large. I'm waiting on a Starrett 156M Screw Pitch Gage,0.25-2.5/Mm, 28 Leaves to determine the exact thread rear mount. I assume this is a good choice for the replacement head at 8x10 on a Durst 138 S / G 139 enlarger... The lens glass looks very good.

The Box that it came in seems to have little relevance to the lens. Nothing about telephoto Tele or Xenar, and nothing about Shutter Rb362 is on the lens. The lens is pretty darn heavy – around 907.1847 grams or about 2 pounds. Looks clean and the blades run smooth and look clean expanding enlarger aperture. The box photographed next to the lens Seller posting was - Jos. Schneider & Co. Optical works / Kreuznach 2, Prototyp Schneider-Kreuznach Componon Tele Xenar, f: 4,5 – to - 32 / F: 240mm., Normalkorper - mount – shutter, nbr. of. Lens : #7107320, nbr. Of. Shutter: Rb362
Telephoto Lens, Screw thread 74mm, Prime Lens, Manual focus, Product weight: 784g, Type: Fixed focal length, Unique!!! for collectors!
from a collection.

Also purchased a Nikon APO Nikkor 240mm F/9 Large Format Lens APO (Apochromatic) Lens - hopefully a good choice for the 8x10 conversion head....

 

[sculptorBradP]

 

[ic-racer]

That is the correct box and label for the lens. What makes you think otherwise. The label indicates it is a Componon 240 in a "normal" barrel. That might indicate no aperture. Does it have an aperture? Barrels with apertures would be called Blendenkorper.

Good idea to check the thread. It may have this oddball thread, circled in red, which fits the Durst lens cone.
For example in the picture shown, the newer Componon-S won't fit the threads of a lens cone for a silver Componon non-S.

 

[sculptorBradP]

That is the correct box and label for the lens. What makes you think otherwise. The label indicates it is a Componon 240 in a "normal" barrel. That might indicate no aperture. Does it have an aperture? Barrels with apertures would be called Blendenkorper.

Good idea to check the thread. It may have this oddball thread, circled in red, which fits the Durst lens cone.
For example in the picture shown, the newer Componon-S won't fit the threads of a lens cone for a silver Componon non-S.
View attachment 284526
View attachment 284527

Thank you Ic-Racer

 

[sculptorBradP]

Thank you ic-racer! Yes, it has an aperture. No shutter, as expected... I will check the thread as you indicated. Great help here - thanks! , - Brad

 

[alanbradford]

Hi Brad, The standard Componon (non S version) 240 will not cover 10x8, only maximum 13x18cm see https://www.photocornucopia.com/1061.html - Componon S models of the 240 will cover 18x24 cm so maybe 10"x8"
The earlier version in M62 x 0.75 fitting the later M66 x 0.75 an even later version was I think M77 x 0.75 and the M62 version (what I need) is extremely difficult to find - I have been looking for many months as I cannot go above M62 on my IFF Ampliator enlarger turret. I did look at the lens you bought but as it only covers 13x18 it was not useful to me. There are also 300mm Componon S lenses that would work but not ideal as the Lens-Paper distance will be longer for 18x24. Other than that the process lenses Klaus mentioned are available and not too expensive usually. Alan

 

[sculptorBradP]

Thank you Alan, for your information. Also a very useful lens chart link! I will go back to finding the lens that Klaus mentioned. All the best, - Brad

 

[alanbradford]

Hi again Brad, I came across a very nice archive http://www.schneiderkreuznach.com/archiv/archiv.htm That suggest that the other list I gave you is maybe incorrect. Here the Componon 5.6 240's all show 18x24 coverage. Your exact lens, with f4.5 is not shown anywhere I can see, all the Componon larger lenses are shown as f5.6 and I do have one of those by chance and it has M50x0.75 mount that I will try for the 10x8 conversion. I think you would also be wise to try your Componon, which maybe is made for a shutter looking at the box showing Rb 362 before buying anything else. Yours may well cover 18x24 as well. Did you measure the thread diameter on yours? Alan

 

[alanbradford]

Here is the full link https://web.archive.org/web/20060210174647/http://www.schneiderkreuznach.com/archiv/archiv.htm

Not entirely sure how this works but the full link is required.

 

[claudius]

NEW 8x10 KITS AVAILABLE

i am well over shipping out the 8x10 kits on the waiting list, and have had time to make some extra kits
ready for shipping
.
due to the current situation worldwide, unfortunately the price on materials has gone up by app. 20 % and i have to raise the price to 540 euro plus shipping.
i hope that the prices will normalize for the next batch i make , probably next year.

another thing is that i cannot guarantee for the glasses in the film holder, they tend to break in the handling / abuse of parcels in transit.
they come separetly but you get a tube of glue to fix it.
i am now using a special LED diffuser that gives you 1/2 stop extra in exposure time.
kindly
klaus
denmark

 

[Dani]

I got my kit from Klaus and it's excellently made. I can't print with it yet but the LED is bright and even. No fan, no heat, no noise, it's a joy and it fits perfectly on my Beseler 45V-XL.

 

[ajmiller]

Where does the negative go on your 45V-XL conversion?

I got my kit from Klaus and it's excellently made. I can't print with it yet but the LED is bright and even. No fan, no heat, no noise, it's a joy and it fits perfectly on my Beseler 45V-XL.

 

[ajmiller]

No worries, just found the Beseler thread. Cheers!

Where does the negative go on your 45V-XL conversion?

 

[alanbradford]

i got my set from Klaus a few weeks back, and I can only say that if any Post Office idiot drooped it from 20 meters height the glass, and all other kit, would have survived as it was really super well packed.

Planar calibration will be a little tricky I think as the head two sections use a supple/expansive joint which won't ensure negative to baseboard parallelism by default, but clearly this can be sorted.

Alan

 

[Dani]

I checked with my versalab parallel and the alignment was spot on.

 

[claudius]

at the moment i have two 8x10 kits available
for for Durst 138 and other with the same base.
the price 540 euro plus shipping.

 

[sculptorBradP]

Hello Klaus, What would the shipping be to Baltimore, Maryland, U.S.A.? I think you might have mentioned that but can't find the correspondence. Also is this payable with a credit card? through PayPal?

 

[claudius]

app. shipping prices as per dec 2021:

usa / world beseler 120 euro ( max 10 kg )
- durst 170 ( max 15 kg )

Europa durst 75 euro
beseler 65 euro
payment on bank transfer or paypal, - preferable in Danish Kroner.

 

[sculptorBradP]

Hello Klaus, I would like to purchase the 8x10 conversion durst 138s G139 – with durst 170 ( max 15 kg ) estimated Shipping
8x10 " conversion durst 138s / G139 - shipping to Baltimore, Maryland, U.S.A. The payment would be through PayPal – which I think would require a payment request from you to my PayPal Account?


Thanks, - Brad

 

[Jon Stuart]

They're screwed together

 

[Peter78]

Hello Klaus, hope you are well and still making these 8x10 conversion kits! I would like to buy one for my Durst Laborator G139 enlarger. Is it possible?

Best regards!

Peter