Mamiya RZ67 110mm lens diagram. Anyone?

<p>Just wondering the construction of this lens. Any ideas or, better, a diagram of it? I am expecting a design similar to a usual 50mm f/1.4 lens for the smaller format...</p>

Perhaps there's something here that you find useful:<br>

<a href="http://web.archive.org/web/20060813092937/http://www.mamiya.com/assets/pdfs/RZ/RZ67Pro-IID_Brochure%20English.pdf">

http://web.archive.org/web/20060813092937/http://www.mamiya.com/assets/pdfs/RZ/RZ67Pro-IID_Brochure%20English.pdf</a>

<p>I have a diagram somewhere I can post, I think it's from the parts/repair manual. It's a typical double-gauss design, 6 (or 7?) elements I think , off hand. A great lens, no doubt!</p>

<p>Colin and Ed,<br>

Thank you very much for your responses.<br>

In fact, I was able to find a tiny, miniscule diagram in the pdf file Colin linked. The lens looks like a "usual" 50mm f/1.8 lens, not an f/1.4 one. I will not be surprised if its "measured" largest aperture is f/3 or something like that. Of course, this does not matter a bit; its rendering does seem special and that is the thing that counts. My copy will be arriving soon and I will be happy to report my experiences later...<br>

Ed, I will really appreciate if you could find the image somewhere. </p>

 

<p>Bulent,<br>

Try here:<br>

<a href="http://www.butkus.org/chinon/mamiya/mamiya_rz67/mamiya_rz67.htm">

http://www.butkus.org/chinon/mamiya/mamiya_rz67/mamiya_rz67.htm</a><br>

Open part 2 of the manual and go to page 17 of the PDF (which is page 41 of the manual).</p>

<p>Colin,<br>

That is it! Thanks a lot again :)<br>

I am surprised to see that the design of the 110mm lens is noticeably different than the 90mm, also a double Gauss.<br>

It looks the same (on paper) to a, say, Pentax 50mm f/1.7 lens (and to many others).</p>

 

<blockquote>

<p>I am surprised to see that the design of the 110mm lens is noticeably different than the 90mm, also a double Gauss.</p>

</blockquote>

<p>The 90mm is different because it has strong elements of retrofocus design; and that design is forced on it because it sits forward of such a deep mirror box - the film plane to lens flange distance of the RZ67 is 105 mm. The rear element of a symmetric 90mm lens would be something like 50-60mm from the film plane, i.e. deep inside the mirror box!</p>