On Jan 17, 2010, at 1:54 PM, David Simms wrote: > Thanks for the tip. > Now, why the reluctance to use filters ? Do you actually they'll reduce the > performance of your R lenses ? > I know that filters represent another pair of optical surfaces but, when your > lenses are big-time expensive, would you not think that the trade off is > worth protecting that front element from dust, accidental abrasion, possible > damage from pollutants in the air and so on ? Also, a skylite or UV does > filter out wavelengths that lie outside the visible range and which can alter > the response of some films. > Anyone aware of studies or tests done on the subject ? have you taken any photos with/without...? let's take a look... Steve > Dave > > > ________________________________ > From: Bob Shaw <rsphotoimages@xxxxxxxxxxx> > To: leicareflex@xxxxxxxxxxxxx > Sent: Sun, January 17, 2010 11:46:28 AM > Subject: [LRflex] Re: formula for lens cleaning fluid > > Avout 5 months ago I decided to try a gel product called "Blu Goo" on my > coated eyeglasses. > www.blugoo.com/ > > Superb results and absolutely no scratches to the anti-glare coating . They > provide their own washable (blue, of course) microfiber cloth. > > I use my fingertips (after bath or shower so skin is soft) to apply, just a > tiny amount out of the tiny jar. Sort of like applying automobile wax with > your index finger tip. > > Then remove the dried film using the cloth. We're talking about 60 seconds > for the whole process, here. There appears to be no polymerization on the > lens surface after cleaning. The product is water-based and contains none of > the usual no-no ingredients. > > If you need to know more, go here: www.blugoo.com/ > > I've considered using on filters but am not going to use on my R lenses until > I hear from someone else who has. Cluck-cluck-cluck...big chicken, here. > > As to microfiber; I never use it on those rare occasions when I must clean > lenses. > > I do the "breath vapor" thing, then gently rub with a very old tight-weave > (therefore pretty much lint-free) cotton dish towel that has been washed > repeatedly (maybe 50+ times over the past several years). I always have one > clean old dish towel available for that purpose only. > > Thing about microfiber is that it is not very absorbent (try drying wine > glasses with a microfiber towel if you don't believe me). Also it seems that > there are different grades which actually can scratch. Sort of a polymeric > crap shoot. > > Probably better for outer garments than for cleaning fine (read as, > Leica/Contax/etc.) optics. > > I now deactivate my Obsessive-Compulsive Module and yield to the Forum on > this topic. > > > Bob > > > > Bob Shaw > rsphotoimages@xxxxxxxxxxx > > > On Jan 16, 2010, at 10:21 AM, David Simms wrote: > >> I couldn't agree more; less is more. Even least may be too much. I'm not as >> hung up on cleaning filters though. I'll probably email Gerry Smith, the >> Canadian dean of Leica repair, to get his input, just to be sure. >> cheers >> Dave >> >> >> >> >> ________________________________ >> From: Sonny Carter <sonc.hegr@xxxxxxxxx> >> To: leicareflex@xxxxxxxxxxxxx >> Sent: Sat, January 16, 2010 10:01:10 AM >> Subject: [LRflex] Re: formula for lens cleaning fluid >> >> On Sat, Jan 16, 2010 at 11:51 AM, David Simms <simmszee@xxxxxxxx> wrote: >>> Hmmmm. Is it capable of cleaning the lettering, for instance on a Leica >>> lens ? >>> I think I'd find myself being somewhat squeamish about using it on optical >>> surfaces although the (possible) Leica-sanctioned mixture that I mentioned >>> would probably not be much less nasty. >>> Thanks >>> Dave >>> >> >> I dunno, many of the older lens components were cemented with organic >> materials. >> >> As far as buying, fixing up and selling, how do you know the long term >> effects of lighter fluid on the lenses? You don't have them any more. >> >> I think I'd just be careful. Less is more with lenses. >> >> -- >> Regards, >> >> Sonny >> http://www.sonc.com >> http://sonc.stumbleupon.com/ >> Natchitoches, Louisiana >> (+31.754164,-093.099080) >> >> USA >> >> >> ------ >> Unsubscribe or change to/from Digest Mode at: >> http://www.lrflex.furnfeather.net/ >> Archives are at: >> //www.freelists.org/archives/leicareflex/ >> >> >> >> __________________________________________________________________ >> Connect with friends from any web browser - no download required. Try the >> new Yahoo! Canada Messenger for the Web BETA at >> http://ca.messenger.yahoo.com/webmessengerpromo.php >> ------ >> Unsubscribe or change to/from Digest Mode at: >> http://www.lrflex.furnfeather.net/ >> Archives are at: >> //www.freelists.org/archives/leicareflex/ > > > ------ > Unsubscribe or change to/from Digest Mode at: > http://www.lrflex.furnfeather.net/ > Archives are at: > //www.freelists.org/archives/leicareflex/ > > > > __________________________________________________________________ > Looking for the perfect gift? Give the gift of Flickr! > > http://www.flickr.com/gift/ > ------ > Unsubscribe or change to/from Digest Mode at: > http://www.lrflex.furnfeather.net/ > Archives are at: > //www.freelists.org/archives/leicareflex/ ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/