Hmm. Now I'm nervous. This sounds like it may end up being more of a project than Dr. Fatfingers here had it mind. My tool kit is from Fisher-Price. Peter. --- Douglas Herr <telyt@xxxxxxxxxxxxx> wrote: > Peter, I've removed two of the collars. The first > time I didn't realize it was glued on and I tried > grinding it down. The vibration shook it loose. On > the second one I pried and twisted with a > screwdriver between the lock button and the collar. > Be careful not to mar the flange. Come to think of > it I may have removed the flange to avoid damaging > it. Re-installing the lock button and especially > it's spring can be a fussy job. > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > > > -----Original Message----- > From: "Peter M. C. Choy" <pmcc_2000@xxxxxxxxx> > Sent: Apr 26, 2005 2:44 PM > To: leicareflex@xxxxxxxxxxxxx > Subject: [LRFlex] Re: Extension tube #14198 question > > Doug, > > The 14198 should be on its way and in my > hands first of next week. Thanks for the > thoughts on collar removal. My neurons can > deal with the setscrew, but I am mentally > challenged by the prospect of ungluing. > Any hints? How firm a grip are we talking > about here? > > Peter. > SF,CA and Melbourne, VIC. > > > --- Doug Herr <telyt@xxxxxxxxxxxxx> wrote: > > > If it's 2-cam you don't get full-aperture metering > > on R bodies. That's the > > only difference. BTW the collar is held in place > > with a setscrew and glue. > > > > Doug Herr > > Birdman of Sacramento > > http://www.wildlightphoto.com > > > > > > > > on 4/25/05 9:43 PM, Peter M. C. Choy at > > pmcc_2000@xxxxxxxxx wrote: > > > > > Doug, > > > > > > Many thanks. I'm hoping I will be able > > > to modify a 14198 in the way you suggest, > > > provided my gray matter is up to the task. > > > The only remaining issue is whether the > > > particular 14198 I have in mind happens to be > > > a 3 cam model. Will your suggested modification > > > work for my purposes if it turns out to be > > > a 2 cam model? > > > > > > Peter. > > > > > > --- Doug Herr <telyt@xxxxxxxxxxxxx> wrote: > > >> on 4/25/05 6:59 PM, Peter M. C. Choy at > > >> pmcc_2000@xxxxxxxxx wrote: > > >> > > >>> I have a 2nd version triple-cam 60mm Macro > > Elmarit > > >>> that I use on my SL2. The extension tube that > > >>> goes with this lens is #14256, which I believe > > >>> is R only and thus can't be used on the SL2. > > >>> > > >>> Can anyone tell me if the extension tube that > > >>> goes with the lst version of the lens, #14198, > > is > > >>> compatible with the second version of the > lens? > > >>> If so, is it possible to use the first version > > >>> extension tube with an SL2 and the 2nd version > > >>> 3 cams 60mm Macro Elmarit? > > >>> > > >>> Thanks in advance. > > >>> > > >>> Peter. > > >> > > >> I know of no reason the 2nd version 60 Macro > > >> couldn't be used with the > > >> 14198. You can use the 14256 if you modify the > > >> camera-end flange, but you > > >> will have to use stop-down metering on the SL2 > > when > > >> you use this modified > > >> 14256. > > >> > > >> A better (IMHO) solution is to get a 3-cam > 14198 > > and > > >> remove the collar that > > >> fits over the 60's aperture ring. This will > then > > be > > >> usable with any > > >> Leicaflex-compatible lens and either R or 'flex > > >> bodies with full-aperture > > >> metering. You even get full-aperture metering > > with > > >> single-cam lenses! A > > >> further modification is to have the lens-end > > flange > > >> modified to fit R-only > > >> lenses, then you will have a truly universal > > Leica-R > > >> extension tube. > > >> > > >> Operation with this modified extension tube > > requires > > >> a bit more brainpower > > >> than with the unmodified tube but if you can > type > > on > > >> a keyboard you ought to > > >> have an adequate supply of functional neurons. > > >> Here's how it goes: > > >> > > >> ) set the lens' aperture ring to the minimum > > >> aperture > > >> ) assemble the various parts > > >> > > >> (these two steps can be performed in random > > order) > > >> > > >> ) when metering, use the aperture ring on the > > 14198 > > >> ) think of the 14198's aperture settings not as > > 2.8, > > >> 4. 5.6, etc, but as > > >> "full aperture", "one stop down", "two stops > > down", > > >> etc. Obviously this > > >> corresponds quite well to the actual settings > > >> (neglecting extension factor) > > >> when the lens' maximum aperture is f/2.8. > > >> ) be aware of the lens' minimum aperture and > > don't > > >> try to stop the 14198's > > >> aperture ring down farther than the lens's > > >> corresponding actual aperture. > > >> > > >> Doug Herr > > >> Birdman of Sacramento > > >> http://www.wildlightphoto.com > > >> > > >> > > >> ------ > > >> Unsubscribe or change to/from Digest Mode at: > > >> www.horizon.bc.ca/~dnr/lrflex.htm > > >> Archives are at: > > >> www.freelists.org/archives/leicareflex/ > > >> > > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > Tired of spam? 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