Yahoo Groups archive

Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

Re: [Digital BW] DSLR sharp? -- was How tiny dots determine real resolution in a B&W ink prin

2008-09-28 by Stephen Kobrin

Is there a way to mount Leica M lenses on a Canon DSLR.  I know that
Steve Gandy sells adapters for R lenses, but I did not think the M
lenses could me used on a DSLR.  I would love to use my Leica lenses
on my 40D.

Steve
> For now and for mild wide angles, I'm inclined to use Leica-M as the 
> standard against which to compare MTF curves -- in part because they 
> exist.  I'm just staying away from the extreme wide angles until I 
> see acceptable mild wide results.
> 
> >... Note that based on sensor pixel pitch the 5D2 is 
> > probably diffraction limited from about F5.6 ...
> 
> > See Lloyd Chambers discussion of the 21 mpixel full 
> > frame diffraction issues
> > (based on 1Ds MK3, but still 100% relevant).
> > http://diglloyd.com/diglloyd/free/Diffraction/example-1DsM3.html
> 
> As with most good lenses, the Leica lens in the above test was best 
> in the center at f 5.6.  After that, diffraction becomes a limiting 
> factor -- in the center with the 21 mp sensor as well as with most 
> other systems I've used.  I'm impressed the sensor can see the 
> difference between f5.6 and f8. On the other hand, I was amazed my 
> little Rebel 8 mp can detect as much as it can. 
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.