Jupiter-8 with 18 aperture blades!

[raid]

Who here has used such a lens? I received today a KMZ made J-8 from 1952. It has 18 aperture blades. I wonder who made the aperture mechanism to have so many blades. Was it KMZ in 1952 or did someone later on craft such aperture blades for the J-8? It states online that IRONGlass modified the lens.

I will try to use the lens tomorrow.

 

[Huss]

Interesting, the opposite of the Zenitar ME1 that has only 2 aperture blades and a square iris.

 

[raid]

I read about such a lens at LeicaPlace, and someone here saw the same lens for sale, and he told me about it. I then bought is immediately that day.

 

[Ko.Fe.]

I remember lens like this surfaced on exAPUG earlier this year. SN 5216600.
https://www.photrio.com/forum/threads/jupiter-8-with-18-aperture-blades.145906/

My personal conclusion, it was New Year assembled lens. Double after double. 🙂

 

[Huss]

I remember lens like this surfaced on exAPUG earlier this year. SN 5216600.
https://www.photrio.com/forum/threads/jupiter-8-with-18-aperture-blades.145906/

My personal conclusion, it was New Year assembled lens. Double after double. 🙂

Imagine what would happen if Russia won the world cup. Quadruple sets of aperture blades..

 

[DanskDynamit]

it's an IRONGlass frankenupiter.

 

[ForestCap]

I have an Industar-61 with 10 blades AND click stop. Maybe not too uncommon, but given the large numbers of other Industar-61s and careless sale descriptions, I felt lucky to find one.

 

[David Hughes]

Interesting, the opposite of the Zenitar ME1 that has only 2 aperture blades and a square iris.

Hmmm, that's interesting; my Zenitar-K2 has only 6 blades.

I hope we see some shots from the 18 blade wonder: please Raid...

Regards, David

 

[lynnb]

Yes Raid, I'd like to see pictures too..

 

[raid]

I remember lens like this surfaced on exAPUG earlier this year. SN 5216600.
https://www.photrio.com/forum/threads/jupiter-8-with-18-aperture-blades.145906/

My personal conclusion, it was New Year assembled lens. Double after double. 🙂

I bought the same lens (same serial number). The buyer of that lens must have sold the lens.

 

[raid]

Hmmm, that's interesting; my Zenitar-K2 has only 6 blades.

I hope we see some shots from the 18 blade wonder: please Raid...

Regards, David

Hi David,
I will take some photos of the lens and with it too.
By the way, the Zeiss Planar 85/1.4 and Distagon 35/1.4 both have only 3 aperture blades in the version made for the Rollei QBM SLR system. The OOF rendering gives triangles and not circles.

 

[raid]

Yes Raid, I'd like to see pictures too..

As soon as feasible, Lynn.
The cost for the lens was about $100 total (including shipping).

 

[raid]

it's an IRONGlass frankenupiter.

It may have been a challenging job to create an 18-blades aperture mechanism. How much would a camera repair person in the USA or UK charge to create such a lens?

 

[raid]

Here are some snapshots of the lens first.

The lens looks clean.

 

[ForestCap]

I think it's a rebuilt lens. The lens block says 1952 while the body is a post-1955ish single helicoid design, instead of the pre-1955ish double helicoid deisgn (painful to reassemble if not marked carefully when disassemble).

I have rebuilt a J8 with a 1953 lens block sitting on a 1960s body.

 

[raid]

It looks as if this lens needs some serious shimming. Maybe this is why the previous owner sold it.

Using the M240 RF:

My eyesight is not that bad.

 

[raid]

I think it's a rebuilt lens. The lens block says 1952 while the body is a post-1955ish single helicoid design, instead of the pre-1955ish double helicoid deisgn (painful to reassemble if not marked carefully when disassemble).

Yes, you are correct. Some website for the company that crafted this lens

http://stores.ebay.com/ironglasslens/

 

[raid]

When I used LiveView in the M 240:

 

[David Hughes]

Thanks; good luck with the shimming.

Regards, David

 

[raid]

I always ask my friend Brian to help me out there.