I don't think Leica originally used Krazy Glue, but if rubber rings on some of their lenses are fairly tight and clean on inner side than there should be enough grip to prevent slippage when focussing.
Few months ago my Elmarit-R 28 started focussing past its hard stop, or so it appeared. That time I didn't even notice that unlike other R lenses Elmarit-R has rubber focussing ring instead of a metal one.
Making long story short, I sent it to Steve Camera Service Center (highly recommended, BTW) and they simply advised me that all they had to do is to re- cement/glue the rubber ring so it wont slip.
Michael is correct about being careful not to glue screws. Below is Summilux-R 80 with removed rubber band. I cleaned the inside of a rubber band, metal part around screws then simply applied 4-5 tiny drops of Krazy Glue every 2 cm and the focussing was perfect again without any slippage.
xenon99's situation may be different; however, this is what solved my problem.
And yes, it's beyond me why Leica (or Contax) would use rubber bands on some of their lenses!
Kudos to Zeiss for their current all metal Z* lenses.
f/4 exactly!
I took around 5-6 shots of these guys but only half captured most of them in focus (they were really buzzing up behind a bar, so I had no chance to keep them standing still)
D800 has 100% coverage, bright viewfinder so even with stopped down darkening it's still manageable to focus in a daylight. Anything at f/5.6-8.00 calls for LV and tripod.
Summilux-R should be especially easy to focus even at f/4.
georgms wrote:
John, nice to see that the Apo-Telyt seems to work just fine for you!
jhinkey wrote:
Yes, it is very sharp, high in contrast on my D800 - things my venerable 200/4 AIS does not have. It's heavy and a bit bulky, so it likely won't go on any mountaineering expeditions any time soon - the 70-200/4 VR Nikkor is the likely candidate for that.
The 180/3.4 is too big and bulky for you? What do you usually shoot with?! It's the smallest ~180 lens I've seen (200/4 might be a little thinner, but it's longer), including that 70-200/4.
Lee Saxon wrote:
The 180/3.4 is too big and bulky for you? What do you usually shoot with?! It's the smallest ~180 lens I've seen (200/4 might be a little thinner, but it's longer), including that 70-200/4.
The Voigtlander 180/4 is significantly smaller and lighter.
Like your LV picture above. Thanks for the reply. You are good at nail focus at f4. 35cron seems easy enough for me to use it as P&S for it has a lot DOF. (still, I don't want zoom in 100% )This is the biggest complain I have with Leica R on any system without auto aperture. I really miss shooting at f5.6 and focus at f1.4 of my ZF.
General speaking, Leica R Lens has more tolerance on focus error than Zeiss because of focus transition character. in focus plain is not as strong defined as Zeiss.
JaKo wrote:
Summilux-R should be especially easy to focus even at f/4.
I find this lens/viewfinder combo extremely bright and easy to focus even stopped down. I realize it's f/1.4 lens but due to its large glass size it seems much brighter than both my Nikkor 50/1.2 AIs or Nippon Kogaku Nikkor-SC Auto 50mm f/1.4 I used on Nikon FE2 SLR.
Like your LV picture above.
Thanks. The light was just perfect last evening and both buildings had this rich, saturated HDR look to them (very minimal PP with no WB adjustments were made to final images)
When I drive around looking for interesting spots/objects I always keep a tripod in my car and use it whenever possible. It makes much easier for me to get OV focus right in a single shot.
Tripod is hardly convenient when going for a walk with my wife, but that's when I take 2-3 shots to ensure at least one nailed the focus.
zhangyue wrote:
Like your LV picture above. Thanks for the reply. You are good at nail focus at f4. 35cron seems easy enough for me to use it as P&S for it has a lot DOF. (still, I don't want zoom in 100% )This is the biggest complain I have with Leica R on any system without auto aperture. I really miss shooting at f5.6 and focus at f1.4 of my ZF.
That's what I love about shooting 28mm; I don't have to worry about nailing the focus cause of the broad DOF. Nailing focus on telephoto at < 2.8 through viewfinder is hard!
Just ordered the Eg-S screen for my 6D based on your suggestions. I'll update on how much it helps for viewfinder-based focusing.
Jack, I feel f1.4 lens should not make any difference on focus when shoot at f2.8 or f4 compare to f2.8 lens,(of course, focal length will make some difference, in your case 80lux will make it easier than 28/35/50 at the same aperture, if around same distance.) it shouldn't be related to glass size but aperture, hence for my original question. I can tolerate that since I shoot all three lux WO most of the time
Michael, my original remark that Summilux-R should be especially easy to focus even at f/4 should be specific (my bad!) to Summilux-R 80 as it's the only Lux lens I currently own, and which physical size of the aperture at f/4 is 80% of Summicron 50 wide open.
The above was in relation to OVF brightness when using Leica-R lenses stopped down. I hope it makes sense now.
Thank you. For what it is worth, the colors are essentially SOOC. I just applied a tone curve and probably corrected the vignetting a little on the wide open shots.
)This is the biggest complain I have with Leica R on any system without auto aperture. I really miss shooting at f5.6 and focus at f1.4 of my ZF. 
