9 of 9 people found the following review helpful
Excellent Filter Film for a Telescope,
This review is from: Baader Astro Solar Film A4 Sheet (Electronics)
Having some experience in Solar observing following several Eclipses I did not get this product from this buyer but my local photographic shop, who sold me the Telescope, this is just a confidence thing on my part, having seen this go wrong in the past. However, the original reviewer has confirmed this is the ND 5 film suited for use with telescopes, so I will be happy to come back here should I need to protect another instrument.
At A4 it is just about wide enough to fully cover a 5" Telescope and long enough to also also cover the finder scope (because you don't want to peek directly at the sun at any magnification). You could probably go to 6" or larger but be absolutely sure you have no chinks or gaps to allow unfiltered light into your scope. Baader offer some good advice on building a filter cell which I have adapted. I followed their instructions for the scope collar but extended the frame for the film to cover the star finder. It worked well over the weekend photographing Sun spots. I am now looking forward the transit of Venus in June, and possibly the next Eclipse expedition.
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Showing 1-3 of 3 posts in this discussion
Initial post: 27 May 2012 11:32:19 BDT
G. wilson says:
do you know if this would be suitable for my celestron astromaster 114 eq, to use when the transit of venus occurs?
In reply to an earlier post on 29 May 2012 09:14:54 BDT
Last edited by the author on 29 May 2012 09:16:03 BDT
Andrew Johnson says:
I am advised the A4 size film is all ND 5 Telescope quality film so use this.
You will need to construct a card holder to go over the objective end of your scope. Baader include instructions for this. On a 114 this will be more than enough.
I can not stress this enough, do not use a "sun" filter at the eyepiece end!
I adapted this design by sandwiching the film in the front and back of a cereal packet thus making an extra window for the finderscope. I think I put a photo of this on the listing, if not I will add one
In reply to an earlier post on 29 May 2012 15:40:19 BDT
Last edited by the author on 29 May 2012 15:40:48 BDT
G. wilson says:
thanks alot buddy seen the pic, i might copy your idea it looks good.
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