MTF charts for Zeiss 4/40mm C Distagon?

[al_bowers]

<p>Does anyone have a link or the PDF file for MTF charts of the old 4/40mm C Distagon (T* or non-T*)? I have the MTF charts for the 4/40 CF(E) FLE and the 4/40 CFE IF models, but not for the older C lens. Any help appreciated...<br>

Thanks!<br>

Al Bowers</p>

[leighb]

<p>Datasheets for all(?) the Zeiss lenses are on the Hasselblad Historical site http://www.hasselbladhistorical.eu/</p>

<p>- Leigh</p>

 

[john_stockdale2]

<p>Also some charts at www.zeiss.com > support > downloads > historical data sheets.</p>

[q.g._de_bakker]

The data sheets are a bit hidden away on Hasselblad Historical, and i promose i'll make them more visible, needing fewer clicks, when i can find time.<br><br><a href="http://www.hasselbladhistorical.eu/HW/HWLds.aspx">Here's</a> a direct link to the Lens Data Sheet page.

[al_bowers]

<p>Guys,<br>

Thanks much. I did not realize, there are three optical designs, and at least four mechanical designs for the 4/40 Distagon over the years. It appears that original CF design had one type of lens barrel and mechanical design, and the CFE had a different lens barrel and mechanical design. Interesting.<br>

One other piece, though the newer CF and IF optical designs are improved over the old 4/40 C, the old 4/40 C was quite a good lens, particularly from the center out to as far as 32mm off-axis. So only the extreme corners have large fall-off (at f/8 anyway) in both resolution and contrast. The CF/CFE and IF are better (the IF rocks in contrast). Of course, wide open the old lens suffers in comparison. But there are places the old lens actually does very well against the newer lenses (e.g.: all at f/8, 40 LP/mm, saggital @ 34mm off-axis: C T=0.56, CF/CFE T=0.26, and IF T=0.60). That IF is a great lens...<br>

Good to know, thanks...<br>

Al</p>