From: Rodolphe Pineau <pineau@rti-zone.org>

Date: November 27, 2012 10:55:56 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Focussing issues .. need advice

On Tue 11/27/12, at 21:47, Dave Goodyear wrote:

I think you approached the Dawes Limit of the scope… I see other pictures on the net using a 102 and 5x powermate and they look about the same..  How’s your collimation?

Hi Dave.

I though about that too and when I read your previous email it made sense to me… I'll have to try with a 3x Barlow and see if there is an improvement.

The collimation is prefect on this scope.

I have an 8" f/4 refractor (812mm focal length) that I haven't try in a while so I'll do more test with that too.

But overall I think you're right and I've gone over the Dawes limit which explain the issue I see.

Thanks for the reply and clarification.

Regards, Rodolphe.

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