Scratch on Polarizing Filter
Oct 8, 2017 11:36:09 #
Oct 8, 2017 13:00:39 #
Not having seen the scratch my guess would be that you will not see the damage done from the scratch in most cases unless you blow up the area on the file that falls within it's space. You will then find that part of the photo is soft in sharpness and lacks contrast. If you get a reflection off the scratch and it gets to the sensor, it will ruin the photo. My advise is to take some test shots but ultimately I would replace the filter. Better the filter than the front element on your lens; be thankful you had it on at the time (assuming it was on a lens when it happened.
Oct 8, 2017 15:30:46 #
Oct 8, 2017 17:02:04 #
toxdoc42 wrote:
There are glass polishing products on the market that can help. If you spent a lot for the filter this might be cost effective.
Have you ever polished glass before? It is a lot more difficult than you think. Besides, you'll be changing the thickness of the glass in one area, which will result in distortion.
Oct 8, 2017 17:49:56 #
When I was a kid I made my own telescope mirror, yes, I had to Polish the glass. I also have done that on non-lens glass. I didn't say it is easy, just doable.
Oct 8, 2017 18:03:08 #
Do the following test. Shoot a solid white background. with light coming from the right, then left then directlty into the lens. First wide o pen then stopped down. Then examine the results. If no problems, problem solved. If there is visable abnormalities then you have a descision to make
Oct 8, 2017 18:09:23 #
lamontcranston wrote:
I doubt that it will have any noticeable effect on your photos. Many photographers with more experience than me say minor scratches on a filter won't have any effect on your photos. But I'm glad the scratch is on your filter rather than on your expensive lens.
Buy a new filter.
Oct 8, 2017 20:13:35 #
boberic wrote:
Do the following test. Shoot a solid white background. with light coming from the right, then left then directlty into the lens. First wide o pen then stopped down. Then examine the results. If no problems, problem solved. If there is visable abnormalities then you have a descision to make
Accidental post.
Oct 9, 2017 13:25:13 #
toxdoc42 wrote:
When I was a kid I made my own telescope mirror, yes, I had to Polish the glass. I also have done that on non-lens glass. I didn't say it is easy, just doable.
How many hours did it take you to polish the glass?
Oct 10, 2017 02:25:54 #
boberic wrote:
Do the following test. Shoot a solid white background. with light coming from the right, then left then directlty into the lens. First wide o pen then stopped down. Then examine the results. If no problems, problem solved. If there is visable abnormalities then you have a descision to make
And what if the problem only shows with the light above or below?
Replace the filter and be glad you didn't scratch the lens itself.
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