Astronomy Site: Meade Advanced Products Users Group Archive: Re: [M]: field derotater and flat fields


 

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Subject: Re: [M]: field derotater and flat fields
From: Glenn W. Elliott
Reply To: mapug@shore.net
Date: Thu Jan 01 16:55:32 1998

While you're here, how about checking out the Astronomy Book List ?

At 02:10 PM 1/1/98 +0000, you wrote:
>>just a point of reference.
>>
>>Jason Wares great astro photos
>>with the 16" LX200 are done with
>>chemical film and not with a ccd camera
>
>Absolutely right.
>
>Dennis di Cicco has many published CCD images (I located 9) taken with
>his 16" LX200 but I am not sure if he uses a de-rotator.
>
>The only other originator of CCD images taken with the 16" LX200 I could
>locate is Jack Newton. See the tricolour image of M27 in S&T Dec. '97
>p.125 taken with the inimitable Pictor 1616xt :). The exposures here
>were 5min r 20min g 20min b so if Jack is using the de-rotator then the
>flat field issue does seem to be a practical concern. It's a shame Jack
>doesn't participate in MAPUG given his successes with the 416xt/1616xt
>cameras. Can anyone persuade him? :)
>
>Graham
>
Graham

A friend and the Sec.-Tres. of my club (Central Coast Astro. Soc.)
visited Jack Newton's Ob. last summer. The 16" LX 200
of his is polar mounted right where his 25" refractor used to be.
If I get to meet him again at RTMC like last year I'll ask. ;-)

Glenn


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