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.
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
Well-known
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
Veteran
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.
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.
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ferider
Veteran
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.
Best,
Roland.