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Search: Posts Made By: John King
Forum: Darkroom 21st August 2019, 10:04 PM
Replies: 7
Views: 3,743
Posted By John King
Lens marks

Those marks are nothing else but discolouration of the coating due to age or atmospheric pollution some time ago. They WILL NOT make any difference that the user will be able to detect.

If, as the...
Forum: Darkroom 21st August 2019, 07:51 PM
Replies: 7
Views: 3,743
Posted By John King
Lens coating

The effect on the performance with one tiny mark will have no appreciable effect on your prints. If you were to conduct scientifically controlled tests under laboratory conditions even then I doubt...
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