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198 Posts
Hi Jim
It is more likely that poor focus is caused by the lens not mounted
fully snug or slightly cocked than scratches on the lens surface. I
cleaned my HD-8 lenses with camera lens tissue and Eastman
lens cleaning fluid. All three had circular scratches on the front
and rear elements afterward. It did not cause any problems with
focus. I now use a compressed air can and the microfiber Ultra Cloth
(from Leland Inc.) to clean the lenses.
DH
It is more likely that poor focus is caused by the lens not mounted
fully snug or slightly cocked than scratches on the lens surface. I
cleaned my HD-8 lenses with camera lens tissue and Eastman
lens cleaning fluid. All three had circular scratches on the front
and rear elements afterward. It did not cause any problems with
focus. I now use a compressed air can and the microfiber Ultra Cloth
(from Leland Inc.) to clean the lenses.
DH