2 Clamps f/ CLA Leica Leitz Summicron DR Rigid Summitar Lens *Essential Tools*

Description

This auction is for a pair of stainless steel clamp wrenches. They are purposely designed for
CLA the common Leica classic rigid Summicron, Summicron DR, collapsible Summicron and Summitar lens
.
It is very common for Leica lenses made prior to 1960-70’s to have “haze” inside the lens, due to Leitz used whale oil as aperture blade lubricant, over the years, the whale oil evaporate and created haze on the element behind the aperture blades. This is the most common problem we have seen today, despite there could be other problems, depending on the past usage and storage condition of these lenses. In order to clean off the haze, you need to open the front lens head. The common rigid Summicron, Summicron DR, collapsible Summicron and Summitar lenses have similarities on the lens head design. They all screwed into the lens front part. Conventional lens pliers may do this job in some cases. Certain lenses, especially the rigid Summicron and Summicron DR, have very tight front head. In most cases, you will never get the lens head loose with conventional lens pliers. The tightness of a particular lens head varies a lot due to lenses were made in the “match and fit” era. To date there is no special tool made just for these lenses in the DYI market. Improper sized clamp wrenches, do not fit the lens rim/barrel well, could break the lens elements due to uneven force and brittle glass in the lens. This tool set is precision designed and made of stainless steel, hand polished. It fits very well on these typical lens heads since it was precisely measured based on these lenses. For Summitar – besides the common haze problem, a lot Summitar lenses have the tight aperture ring problem due to the tight fit of the aperture ring. To solve this problem, you need to unscrew the lens head with the large clamp wrench, then carefully unscrew the two screws on each side of the aperture ring, clean off gummed up old oil residue and apply new grease, it will work like a magic. Further the Summitar front lens head has two parts, if you have two large clamp wrenches, you may also open the front part. But in our auction we only include one large wrench this time. Also be careful the front part has very venerable coating. For rigid Summicron and Summicron DR – you need first unscrew the lens head from the base, as we know these kind of lens heads are removable for close up device. Then put the smaller clamp wrench to the end of back barrel threaded area, put the large clamp wrench on front rim. Both wrenches have long handles, you will be easily unscrew the lens head. For lens cleaning, make sure use high quality optical cleaner. You rather do less than too much. All these lenses have soft coatings. You need to be careful on the cleaning job. As for how to clean a lens element, please search for varies websites or find out books on this subject. We only sell the tool set here, we are not liable for individual lens cleaning result of your own attempt.
I included varies pictures to show you how to use this set clamp wrenches on these common lenses.
This auction is for the pair of clamp wrench tool set only.  All lenses are for demo purpose.
Thanks for looking and happy bidding!
Zhou
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