Thursday, April 23, 2009

Wrinkle on front filter

As we all know, wrinkles on Baader solar film will not affect image quality. However, why is that? Is it because the film is so thin?

If that's the case, I'm wondering if I can use simple red plastic sheet as ERF?

Don't do that with your eyes, however.


Experiment: I shall put a thin piece of transparent plastic (e.g. those food wrap) in front of a refractor and try it out at high power, but this should not be done on the sun in any case.


Mark Walters said...

Oldfield - Don't look through the telescope fitted with that "food wrapper" red plastic!!! It will not protect your eyes!


Oldfield said...

Thank you for pointing this out.

Yes, let's don't use our eyes for any experiment on the sun. I'll only use my camera.

Thanks a lot, really!