Leica Fake 5cm F2 Sonnars on Ebay, Jupiter-8 lenses with a Phony Name ring.

[Brian]

Lens SONNAR CARL ZEISS JENA 5CM F1:2 T 50MM F2, LEICA M39 LTM LENS RABBIT EARS | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5CM F1:2 T 50MM F2, LEICA M39 LTM LENS RABBIT EARS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

I've noticed many Ebay sellers putting Jupiter-8 lenses with phony namerings on Ebay at prices over $300. These are not pre-war 5cm F2 Sonnars converted to Leica mount. These ARE 1960s Jupiter-8 lenses with a fake namering.

Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 LTM LENS | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 LTM LENS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Lens SONNAR Carl Zeiss Jena 5 CM F1:2 50mm F2 LEICA M39 LTM LENS | eBay

Find many great new & used options and get the best deals for Lens SONNAR Carl Zeiss Jena 5 CM F1:2 50mm F2 LEICA M39 LTM LENS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

These lenses are worth about $50.

Don't expect Ebay to stop these auctions, they are clearly counterfeit and the auctions are cons.

If you have any questions on any auction for a Sonnar lens, especially ones in Leica Mount, feel free to post here. I've taken many of them apart, know them inside-out. I've converted 70 or so to Leica mount. These lenses: they are Jupiter-8 lenses. Buy one for $50.

This one:

CARL ZEISS JENA SONNAR Lens 2/50mm Red T For Camera Rangefinder Contax IIa IIIa | eBay

Find many great new & used options and get the best deals for CARL ZEISS JENA SONNAR Lens 2/50mm Red T For Camera Rangefinder Contax IIa IIIa at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Is a J-8M. Worth about $20. I bought a couple for under $10.

 

[Brian]

For reference:

5cm F2 Sonnar, Converted to Leica Mount by fiftyonepointsix, on Flickr

This is a pre-war (1930s) Carl Zeiss Jena 5cm F2 that I converted to Leica mount using the focus mount from a 1950s Jupiter-8. The optical block is taken from the Contax collapsible mount and transplanted to the Jupiter mount.
Note the difference in the Namering, the font and finish of the ring is different from the phony Sonnars in the auctions linked to.

When you disassemble a Carl Zeiss Jena 5cm F2 made up until 1945, you will find the front glass stamped into fixtures, each with a Serial Number to match the last digits of the lens. SN on the front element, middle triplet, and rear doublet.

Clear_Rear_InPlace_Or_Unscrew by fiftyonepointsix, on Flickr

Optics_Out by fiftyonepointsix, on Flickr

 

[albertk]

This you has been going a long time: fake Leitz LTM lenses that are in fact for instance Industars, that won't even focus correctly.

The brutality: they don't even give an housing with correct flange distance and helix turning angle. Now that would be worth something. [As Skyllany showed]

 

[rayvonn]

The most common examples of these that I’ve seen are the fake “Leitz” Elmar 50mm F3.5 lenses on eBay which the vendor often doesn’t even try to disguise.

 

[boojum]

Lens SONNAR CARL ZEISS JENA 5CM F1:2 T 50MM F2, LEICA M39 LTM LENS RABBIT EARS | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5CM F1:2 T 50MM F2, LEICA M39 LTM LENS RABBIT EARS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

I've noticed many Ebay sellers putting Jupiter-8 lenses with phony namerings on Ebay at prices over $300. These are not pre-war 5cm F2 Sonnars converted to Leica mount. These ARE 1960s Jupiter-8 lenses with a fake namering.

Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 LTM LENS | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 LTM LENS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 | eBay

Find many great new & used options and get the best deals for Lens SONNAR CARL ZEISS JENA 5 CM F1:2 50MM F2 LEICA M39 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Lens SONNAR Carl Zeiss Jena 5 CM F1:2 50mm F2 LEICA M39 LTM LENS | eBay

Find many great new & used options and get the best deals for Lens SONNAR Carl Zeiss Jena 5 CM F1:2 50mm F2 LEICA M39 LTM LENS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

These lenses are worth about $50.

Don't expect Ebay to stop these auctions, they are clearly counterfeit and the auctions are cons.

If you have any questions on any auction for a Sonnar lens, especially ones in Leica Mount, feel free to post here. I've taken many of them apart, know them inside-out. I've converted 70 or so to Leica mount. These lenses: they are Jupiter-8 lenses. Buy one for $50.

This one:

CARL ZEISS JENA SONNAR Lens 2/50mm Red T For Camera Rangefinder Contax IIa IIIa | eBay

Find many great new & used options and get the best deals for CARL ZEISS JENA SONNAR Lens 2/50mm Red T For Camera Rangefinder Contax IIa IIIa at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Is a J-8M. Worth about $20. I bought a couple for under $10.

The first three have the same serial number. LOL

 

[William Lewis]

The most common examples of these that I’ve seen are the fake “Leitz” Elmar 50mm F3.5 lenses on eBay which the vendor often doesn’t even try to disguise.

It's annoying when looking for an inexpensive but real elmar.

 

[Brian]

The fake Elmars: These are usually Industar-10 lenses. Often the F-Stop numbers on the Aperture and Depth-of-Field are different. F18 on the Aperture setting and F16 on the DOF. I have yet to see one with a re-engraved DOF scale.

 

[Brian]

This you has been going a long time: fake Leitz LTM lenses that are in fact for instance Industars, that won't even focus correctly.

The brutality: they don't even give an housing with correct flange distance and helix turning angle. Now that would be worth something. [As Skyllany showed]

I worked out the Math for changing the focal length and reshimming the lenses. some 15 years ago.

50mm Jupiter 3 f/1.5 Information — Jason Howe

jasonhowe.blog

I've also shimmed the I-50 (collapsible), I-22 (Rigid and collapsible), I-26M, I-61L/D, J8, and J3 for the Leica.
The I-50 is the one to get for people wanting a cheap Elmar. It is actually based on the Tessar with the placement of the aperture, between 2nd and 3rd group. Elmar- aperture is after the front element.

Leica Showcase - Industar-50 Collapsible Mount 50mm F3.5

This lens is a Tessar formula 50/3.5 in a brass mount with "very shiny Chrome". Performance compares well with the post-war 50/3.5 coated Elmar and coated Zeiss Tessar 5cm F3.5. The I-50 is the third formulation of the 50/3.5 Tessar in the Industar series, it improves on the optics of the...

cameraderie.org

The pre-war 5cm F3.5 Tessar is expensive, often more than the F2 Sonnar. The I-50 collapsible is Brass.

Sonnar resurrection

Here, at Skyllaney Opto-Mechanics, we have an affection towards Sonnar formula lenses, and we see the desire of our clients to experience these wonderful lenses for themselves. Because of that, we …

skyllaney.com

(Great article, be sure to read down to the last paragraph... )

I'm happy that Chris is offering this service, I refer people to him when getting a query for converting lenses. I'm also getting one of the first Bertele Sonnars and an Omnar converted Zeiss Opton 50/1.5. I'll be testing them and reviewing here when they arrive.

 

[William Lewis]

If I didn't already have an I-22, the I-50 info would be great. Now I think I'll just keep looking for a cheap Elmar while chuckling at the various "tells" of the fakes.

 

[Brian]

It's annoying when looking for an inexpensive but real elmar.

The cheap Elmar I found was on a Black Leica III. In an Antique Store. $15, same as the Chrome Leica III with the Summar on it.
I bought both of them...

 

[Brian]

The Math. Ended up doing Excel spreadsheets to convert focus error to change in shim thickness. Also to move optical groups to acheive better focus.

Subscribe to see EXIF info for this image (if available)

Subscribe to see EXIF info for this image (if available)

 

[Brian]

Zorki Zk 5Cm Single Focal Length Lens | eBay

Find many great new & used options and get the best deals for Zorki Zk 5Cm Single Focal Length Lens at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Phony ZK Sonnar, nothing but a Jupiter-8M with a fake namering. This one is out of Japan! Most are sold out of the Ukraine and former Soviet Union countries.

 

[Brian]

CONTAX III Black / Carl Zeiss Jena Sonnar 5cm F2 [ EXCELLENT] from Japan (22209) | eBay

Condition Classes Excellent. Excellent Pre-owned, minimal signs of use. A wide variety of rare and excellent condition's goods. Our inventory changes too frequently to update every item we carry on the website.

www.ebay.com

Phony Contax III and Sonnar.
A Kiev 4 with Jupiter-8.
From a Japanese seller. Unbelievable how bad this fake is and that a camera shop would pawn it off as a Contax.