Archived posting to the Leica Users Group, 2000/09/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I appreciate your post. This is the very question I joined the list to ask. I do have a couple of questions: (1) Could you clarify the description of the 'furniture leg thing'- is this like a rubber of plastic cup?/// (2) Does the fungus actually eat into the glass or is there a smooth surface after you clean it? (3) is there any actual shop out there that does a good job with fungus treatment? thanks richard - ----- Original Message ----- From: Lee, Jonathan <Jonathan.Lee@hrcc.on.ca> To: <leica-users@mejac.palo-alto.ca.us> Sent: Monday, September 18, 2000 6:03 AM Subject: RE: [Leica] Lens haze-35mm Summicron > Vick, > > I had a 1st version chrome Summicron that had a haze on the front surface of > the rear group and some fungus on the front element. I took it apart and > cleaned the haze using straight up methanol (mehtyl hyrate in hardware > store) and hydorgen peroxide (drug store) for the fungus. > > Taking a lens apart yourself is acutally quite easy. Without previous > experience, I have cleaned my 35 Summincron, a 35 Elmar, a 50 Summar, a 50 > Elmar, and a 90 SM. > > A lens screws together quite simply. You need three tools: an adjustable > lens spanner ($35 at mciro-tools.com), a good jewlers screwdriver, and one > of those rubber furntiure leg (Home Despot) things that will fit inside the > filter ring but not touch the glass. > > First us the rubber thing to unscrew the engraved ring on the lens front. > It just unscrews (counter clockwise) through the filter ring after you press > in it. This exposes the front elements which can be unscrewed using the > lens spanner fitted into those two slots that should be clearly visible. > There may or may not be the visible screws (I forgot). If they are there > unscrew them. The rear elements unscrew also using the spanner slots that > you can see through the lens mounts. There may or may not be retaining > screws. If you are feeling ambitous you can clean the crud and old grease > from the focus ring using mineral spirits and relube them with a lithium > grease. > > Clean away! Even if you don't have visible haze, a good methanol cleaning > does wonders for the clarity of a vintage lens. > > Just remember work on a clean, clear surface and keep the distractions to a > minimum so you don't loose anything. > > Jonathan Lee > -----Original Message----- > From: Vick Ko [mailto:vick.ko@sympatico.ca] > Sent: Sunday, September 17, 2000 8:19 PM > To: leica-users@mejac.palo-alto.ca.us > Cc: leica@topica.com > Subject: Re: [Leica] Lens haze-35mm Summicron > > > If the metal is alloyed into the lens, John is probably correct - the > glass is literally changing its opacity (kind of like cataracts). > > Here's an out-of-the blue suggestion! Is the haze uniform? If so, > maybe compensate for it using filters. > > How much did you pay for it? If it isn't outrageous, maybe I can > offer to buy it from you. No tricks up my sleeve to restore it, > but I'd be interested in seeing what's inside. > > ...Vick > > > Roland Smith wrote: > > > I purchased a 35mm Summicron with eyes on Ebay that was correctly > > represented to contain haze. The condition of the lens was not > overstated. > > > > Upon its receipt, I sent it to a camera repair that has successfully cla'd > > other Leitz lenses for me. It wouldn't clean. > > > > I sent it to John Van Stelton who indicated that the glass used in this > lens > > has metal in it and will oxidize and is not cleanable. The two elements > > with the problem are the ones on each side of the aperture diaphragm. He > > cannot eliminate the haze. > > > > While I greatly respect John's professional opinion, I am curious to know > if > > anyone on this site has any suggestions before I scrap the lens. > > > > Roland Smith > > roland@dnai.com