I've recently used two different glasses which had extensive scratches on the oculars. The scratches appeared to mostly be from improper cleaning. The surprising thing is that I really couldn't detect any effect while viewing. In one case, one side is considerably worse than the other, yet the view appears the same. This seems to defy logic, especially when so much is said about coatings, etc.
What is the explanation of this? Is there a way to "test" the effect of lens scratches on the view?
Thanks, APS
APS, I have some fine scratches on the oculars of my Swarovski 7x30SLC. I had to send this old binocular back to Swarovski to repair and told them if any lens needed replacement to replace. I would be charged for these lens, they used my old lens into a new unit. I am still using this binocular and have had a person that posts on here use this binocular and he liked it very much, he is a very picky person when it comes to optics.
I did find a source of a study on this in UK but you would have to pay for it.
Regards,Steve
For comparison, I can see even pretty light scratches on my eye glasses.