UV filters, unscientific test

Started 5 months ago | Discussions thread
sybersitizen Forum Pro • Posts: 21,337
Re: Try it with a much longer lens

Phil A Martin wrote:

Can you be sure that there wasn't at least some breeze?

Of course there was a slight breeze ... but If you think the breeze completely stopped during the first shot without the filter, I assure you it didn't.

A target fixed to a wall would have been a better test.

That's the test I happened to conduct, using an optically poor filter, as I said. A better test of that filter is not required.

This is a test of a much better filter with a slight breeze still present:

With filter

No filter

Regardless, the point I wish to make here is that any sharpness degradation caused by a filter will be most apparent at much longer focal lengths. I wasn't convinced that focal length mattered in that regard until I did my own testing with some poor filters.

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