In the old days, Canadian balsam was used. I did this once on an old (I think it was a Speed Graphic) lens about 40 years ago.The elements should be marked so that they will be cemented back exactly as they were. One important thing is to insure there are no air bubbles in the cement and that none are introduced as the elements are cemented together. I set the concave portion down like a shallow dish, filled the dish with hot (to flow easy) Canadian balsam from the center (inspected for bubbles with another lens used as a magnifier). I then lowered the convex portion slowly straight down and centered. I just let the excess flow out (and make a mess). I cleaned this up after everything was set and hard. Not a bad job for a 15 year old.
Regards, Bob... -------------------- "Let us contemplate our forefathers, and posterity, and resolve to maintain the rights bequeathed to us from the former, for the sake of the latter. The necessity of the times, more than ever, calls for our utmost circumspection, deliberation, fortitude, and perseverance. Let us remember that 'if we suffer tamely a lawless attack upon our liberty, we encourage it, and involve others in our doom.' It is a very serious consideration that millions yet unborn may be the miserable sharers of the event." - Samuel Adams, 1771 From: "wendy beard" <[EMAIL PROTECTED]> > Talking about lens fungus, Bob wrote: > > > Straight > >Clorox will kill the fungus and oxidize (chloridize?) the spores - dead. If > >you have a compound group, you will want to insure that the cement is not > >affected by the Clorox. If it is, that's not terrible, as the elements can > >be separated and recemented. > > > >Regards, > >Bob... > > Which leads me to the question - has anyone ever recemented lens elements? > I have a pancake lens with rear element separation. I bought it like that a > few months ago, intending to try and put it right. > Trouble is, I don't know where to find lens cement and even if I did, I > wouldn't know where to begin! - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
