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Roger,

Your is a beautiful invention. I don't find anything in commerce similar to your filter. This is a cheaper invention that every astronomer would want.

Thank you

Daniele

Italy

Thank you so very much for your outstanding product. I live in England and you actually beat the UK postal order I had made for another astronomy product, shipping door to door in under 6 days.

Your documentation and materials are outstanding, I really cannot praise the product enough.

It has opened my eyes. I can now see elements on stars hundreds/thousands of light years away...

WOW...

And thanks again

Nick

UK

Dear Roger,

I call this awesome support. Certainly what gets your product recognized in the amateur astronomy community. I guess I will take the B1. I do plan on primarily using it for deepsky work with the DSI. Moreover, the color does have a certain wow effect.

Yours,

Bill

USA

Roger,

Imagine my surprise to receive your package with the free upgraded D1 filter!

That's class.

I took my first images a few nights ago using an ST-10XME and a 12" Meade LX200 (with the old D1 filter). I took pictures of Deneb and there is clearly a spectrum off to either side of the star image, although not much obvious detail in the raw images.

BTW I have a very basic website started for my setup, and I've set aside a page on which I hope to display some of my spectroscopy results. At this point there's nothing significant there, but I did place a link to your website there.

I definitely will recommend your product to others!

Thanks again,

Keith

USA

Roger,

First off I would like to say thanks for deciphering my first spectral image and taking time to make sense of things... Spectroscopy has a very limited following in amateur circles and I think this device could potentially change that-this is exciting.

I am really interested in the red shifts and look forward to some backyard astrophysics! I hope the weather cooperates with me this weekend. I want to try out the grating with my 6" mak-cass.

I am really excited about your device and the possibilities. It seems much more capable than the other transmission gratings currently available.

Best,

Mike

USA

Thanks for your reply Roger. If this product is yours, Im impressed!

We have needed something like this for a long time. I particually like your software which looks fantastic.

Thanks,

Jerry

USA

WOW it works!

The very first shot - Betelgeuse.

yeah yeah I know I forgot to subract darks.

Thanks John

P.S there is a lot to learn

For the money Its great!

I never thought that just looking(visual) at a spectrum was of any use, your way allows for recording, processing, and study

Thanks again.

John

New York