MTF of 135/2.8 2nd version, APO 180/3.4.

[fernando_b]

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Someone does have the MTF curves of the two lenses in the title? I mean the official ones.

Best regards,

Fernando.

[a.noctilux]

Hello Fernando,

 

Just checked my Leica Pocket Guide 8th Edition,

they are on the book as well as other interesting lenses.

Apo-Telyt-R 3.4/180mm is better than Elmarit-R 135mm II * in real life use 😉.

As side note, interesting article on Apo-Telyt-R180mm by Marco Cavina

Where you can find this test with MTF

Side note two : I can use on this Apo 180mm Leica x2 Apo-Extender-R = quite decent 360mm light lens

 

I can't "copy" those MTF as Copyright exists.

You may buy this interesting book :

ISBN 978 -1-874707-00-4

 

* I use the Elmarit-M 135mm which has the same optical cell as R lens,

and easier to use on my M with it's "x1.5 goggle"

Edited April 12, 2019 by a.noctilux

[adan]

Leica's MTF chart for the most recent 135 f/2.8 can be found on page 76 of this document (it is the v.3 M version, but identical glass/performance as the V.2 R)

http://www.l-camera-forum.com/leica-wiki.en/images/3/3a/Puts-2002-M-lenses.pdf

It is the case that Leitz/Leica just did not promote technical details of their 1970s-80s lenses as extensively as their brochures do today.

[fernando_b]

Thank you all. I have other MTF of the two lenses I wrote. I am interested in official MTF curves, i.e. the LEICA or LEITZ ones! If they exist...

Fernando.

[spydrxx]

Irwin Puts included a number of Leica MTF charts in his latest edition of his Compendium.

[Guga Millet]

On 4/12/2019 at 11:45 AM, fernando_b said:

Thank you all. I have other MTF of the two lenses I wrote. I am interested in official MTF curves, i.e. the LEICA or LEITZ ones! If they exist...

Fernando.

Hi there. Can you share the ones you have?

Thank you a lot.

[jaapv]

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Posted with permission from Leica Compendium, Erwin Puts. Erwin is (was) closely linked to Leica and uses the official data from Leica  

 

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Simply register for free here – We are always happy to welcome new members!

[fernando_b]

These are similar to mine: I have Put's Leica Pocket Book 7th edition.

Fernando.

[adan]

It should be noted the LEICA MTF charts are exactly what Puts reproduces in his publications (as jaap says, he had access). They are not even redrawings, just photo-lithographic (or these days, digital) copies of the factory files (perhaps with slightly different headline fonts added). There is nothing more "official" as to the images.

It is also worth noting that Leica publishes theoretical MTFs, as predicted and graphed by their lens design software. Rather than as tested on an optical bench with actual glass.

Although I find them to be reasonably illustrative of actual lens behavior most of the time.

 

[fernando_b]

Andrew,

thank you!

Fernando.

[Guga Millet]

On 8/28/2020 at 10:45 AM, jaapv said:

Posted with permission from Leica Compendium, Erwin Puts. Erwin is (was) closely linked to Leica and uses the official data from Leica  

 

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Thank you very much!!!