Archived posting to the Leica Users Group, 2012/04/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Get it re-collimated. It sounds like a constant error in terms of lens extension. My 75 Summilux had exactly the same problem. It's a matter of changing the lens cell position by probably about 0.05mm (or 2/100 of an inch). If you put a caliper on the lens and measure the OAL of the lens where the RF tells you to focus and the OAL where it focuses correctly, you'll have a very good idea. Dante On Apr 15, 2012, at 5:28 PM, John McMaster 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