Leica IIIf viewfinder question

<p>Does the Voigtlander (CV) 50mm f2.5 screwmount lens intrude into the IIIf viewfinder and, if so, by how much? It looks like the lens was designed so that it did not intrude significantly, if at all. I have a few screwmount lenses and have a rough idea of the lens diameter and (flange-to-front) length combination that would intrude into the viewfinder so if a fellow member only has the lens and could let me know the dimensions, I would be grateful.</p>

<p>Specs listed at http://www.lenstip.com/701-voigtlander_color_skopar_50_mm_f_2.5-lens_specifications.html<br>

The only piece of my Soviet lens collection not intruding my II (red dial)'s VF is the collapsible 50mm f3.5. I suppose with screw mount Leicas already the width of lenses is a major issue since the thick end of the distance ring is visible in the VF. - Good luck!</p>

<p>Thanks for the link. It's a mine of information. It seem that the screw mount Leicas were specifically designed for the 50mm f3.5 Elmar i.e. the viewfinder was designed to just exclude this lens (which is just about as small a lens as you can get). So almost any other lens will intrude so the question becomes; does it intrude too much? I have the Canon 50mm f3.5 collapsible and it does not intrude either. The only other lens I know of that does not intrude is the Super-Rokkor 45mm f2.8. </p>

<p>This isn't the answer you are looking for but in my experience the solution to the Leica II or III viewfinder intrusion problem is to use either the Leica 50mm viewfinder or the very excellent Voigtlander copy. I found a nice example of the latter a few years ago and at this point I consider it a mandatory (for myself) accessory when using any 50mm on this camera, whether there is viewfinder intrusion or not. It makes picture taking with the camera quite fluid and negates any viewfinder issue on my early Leica III's or on my post war samples with side by side viewfinder / rangefinder windows. Makes using the camera a lot easier regardless what lens you use....enables me to use on occasion the quite large F1.4 Nikkor lens.</p>