Recoating Summicron "cleaning marks"

[former member]

I've done before and after shots with internal haze on a Summarit, and the results are dramatic. The coating marks on a lens have to be severe to produce noticeable effects in all of the shots. The attachments were posted on RFF, now long gone. There were quite a few threads on coating marks and haze, with examples attached. Deleted with the server upgrade.

Try the lens. Shine a light though it to detect haze. If it looks like haze fog, it is worthwhile to get it cleaned. A few marks in the coating will not have effect. If it looks like someone went skating on it, get it recoated.

 

[tomasis]

brian, i wonder if the same lens without any coating or damaged coating has usually lower contrast, is easy to flare? what else? I just thought about older lenses without coating which have much lower contrast. Depends it on the type of coating or also optical formula?

 

[Nokton48]

Here are Some of the Marks:

Here are Some of the Marks:

The Digital on-camera flash has caught some of the front marks. As you can see, they are very fine, in a circular pattern, and very numerous. I'd say a coupla-hundred, total.

 

[ferider]

If you have the money, have it recoated. John does excellent work, including the CLA, and the (quite valuable) lens will come back like new. John also does re-collimation after re-coating, so the lens might be sharper than before when he is done. Part of the charm of the Summicrons for me is the size. You might not always want to use a hood ....

Best,

Roland.