Quote:
Originally Posted by dmill1220  Hi Dave,
Its the thousand Oaks Glass full aperture filter which produces a nice amber color and not blue or white like the Baader film.
The Baader film is susceptible to finger print degradation and pin holes
I have the 4inch filter that I place on the cap with the 4 inch aperture stop that came with my 6 inch refractor, the resolution is very good.
if your 11 inch Schmidt has a lens cap with an off center aperture mask, I would purchase the smaller filter for the aperture stop, You either purchase such a lens cap if you dont already have one, or just make your own.
Dennis |
My experience with the Baader film over many years has been excellent, used almost daily. It is double coated both sides and pinholes are rare and even if they exist, are no cause for concern.
If you have a large aperture telescope, the most cost effective way of making a solar filter is to use an off centre mask, i.e a a disc covering the entire front of the scope, cutting a 4" or 5" hole to one side between the edge of the scope & the secondary mirror holder, then cover the hole with Baader solar film or a glass filter of that size. Do NOT stretch it tight, it works best left with a few natural wrinkles in it.
Keep in mind that, the Baader film offers the best resolution, the glass filters are NOT optical flats, so will degrade the image on a good scope, but not that noticeable unless using an APO for photography. More often than not, the seeing conditions during the day is your worst enemy.
In which case the Baader Herschel Solar Wedge is the go.
Regards
Shevill
Southern Cross Observatory-42 South Tasmania
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