Date: Tue, 14 Mar 2006 21:50:25 -0500
From: Shawn Dvorak <sdvorak
To: Greg Crawford <gc
References: <002f01c647c5$87b0d400$0200a8c0
	main.rollinghillsobs.org
	version=3.0.4

Greg Crawford wrote:

>My Custom Scientific filters, bought through SBIG, seem to have deteriorated and
>I am looking at replacing at least the V and R, possibly also the I filter. 
>
>As far as I can see there are three suppliers in increasing order of cost:
>
>Astrodon, who took over Schuler filters, have 1.25" VBR sets for $182, so approx
>$61 each. See here: http://www.astrodon.com/products/product.cfm?CatID=4
>
>Optec have UBVRI 25.4 mm filters for CFW filters wheels at $125 each. So $375
>for VBR. See here: http://www.optecinc.com/optec_065.htm
>
>SBIG's selling of Custom Scientific 1.25" BVI sets for $525. So $175 each. See
>here: http://www.sbig.com/sbwhtmls/online.htm
>
>This is quite a significant difference in price per filter: $61 vs $125 vs $175.
>However, deterioration seems to be a problem and I am wondering whether users
>have found some brands more resistant to deterioration than others.
>
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