From: Alan Friedman <alan@greatarrow.com>

Date: March 19, 2010 10:43:20 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] IR filter for solar imaging

Your feeling is correct. An additional IR filter is not needed.

best,

Alan

On Mar 19, 2010, at 12:35 PM, John wrote:

Hi all,

I have a quick question about the use of an IR filter.

I am using a Lunt LSHa60t scope with a TIS DMK 2104.AS camera. I have not been using any other filters in the path. My feeling is the Ha scope is narrow band and excludes the IR as well.

I have a 1 1/4 in IR cut filter I can use for other setups. I suspect given my present solar scope I will be better off with less glass in the imaging path. True or not?

Thanks,
John B