Archived posting to the Leica Users Group, 2012/04/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]John you may be seeing an error that is only apparent at the closer distances. That is to say it is still there but masked by DoF sometimes. That lens and the older Noctis would have to be the most demanding to work with on the M9 of course. I think it is relatively common that they need adjusting. The same spherical abberation that gives you 'creamy bokeh' indicates that they must focus shift as well and of course even perfectly adjusted the margin for error is miniscule wide open.. As far as I know the adjustment standards are for wide open operation and you learn to work from there when stopping down. I would start with establishing what you camera does and what your vision does. I mean be sure of where your baseline is. How is your vision correction? One eye better than the other (mine are different) What do other lenses do in your test setup? How consistent are the results when testing? How about another shooter with your camera and Summilux? Camera Clinic in Melbourne just adjusted my new Summilux 35 ASPH for me in Australia which really surprised me. It came back perfect.. Cheers, Geoff http://www.pbase.com/hoppyman On 16 April 2012 07:28, John McMaster <john at mcmaster.co.nz> wrote: > Just what is possible with tweaking? > > I tested my 75mm Summilux yesterday, tripod and 1.4x magnifier, at f1.4-f8 > in full stops. I am more interested in the wide open focus. > > It is spot on 10m to infinity. > > It back focusses greatly 3m to 8m (+10cm) > > It back focusses less so <3m > > Will it ever focus correctly at all distances? > Will I have to choose an aperture and distance to get optimum calibration > and the rest all fit around that? > > thanks > > john > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >