The films are not as durable as the glass. The films are prone to getting holes. I've had my glass filter for over 20 years. When your eyesight is at stake to your really want to scrimp, the glass filters are not expensive.
To Chrismo,
You can make a filter very inexpensively this way. I made one for my 10" by sandwiching the baader film between two rings cut out of black foam-core board and then making a ring around the outside using two layers of black poster board. I finished off the edge with black vinyl electrical tape and it looks great, works great and cost me less than $30. I think that the view from this is as good as a glass filter.
Thanks Rodger Fry
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chrismo Sent: Saturday, September 03, 2011 3:09 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Need solar filter material
Just curious, since I don't know much about this end of things... would this film be "as good" as more expensive glass filters? I was planning to buy a filter for my 8" scope, but it looks like this stuff would end up costing about $100 less. Also, how would you go about making a filter using this material? would you just make a frame to fit over the end of the scope?
On Sat, Sep 3, 2011 at 1:15 PM, Jared Smith <jared@smithplanet.com> wrote:
How much do you need? I have a big sheet of Baader visual film, but am making a couple filters this week. I might have enough for a small scope left over.
There are a couple ISS solar transits in Northern Utah coming up in the next week or so.
Jared
On Sat, Sep 3, 2011 at 11:46 AM, D P Pierce <starsbirdsglyphs@gmail.com> wrote:
I need some inexpensive solar filter material..
Deloy Pierce
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