[Lvas] Lvas Digest, Vol 21, Issue 24

Wed Mar 18 18:29:39 PDT 2009

Roger,

I have always been impressed with the pinpoint sharpness of the stars in a 
refractor over most reflectors but I always come back to a large aperture 
reflector to pull in the deep sky objects. I would like to spend time with a 
big refractor like Lowell or Yerkes but have not have the opportunity. I 
have visited Lowell a couple of times but have been disappointed by the 
limits the staff put on viewing time and viewing subjects.

Like many things in life there are trade-offs between a good refractor and a 
good reflector...

John
----- Original Message ----- 
From: <lvas-request at lvlug.org>
To: <lvas at lvlug.org>
Sent: Wednesday, March 18, 2009 5:44 PM
Subject: Lvas Digest, Vol 21, Issue 24

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> Today's Topics:
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>   1. FW:  Virgo Cluster Identification (roger ivester)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 19 Mar 2009 01:08:57 +0000
> From: roger ivester <drivester at hotmail.com>
> Subject: [Lvas] FW:  Virgo Cluster Identification
> To: <lvas at lvlug.org>
> Message-ID: <COL102-W62695C61F36D0A4438DC5DB3960 at phx.gbl>
> Content-Type: text/plain; charset="windows-1252"
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>
> One of my local observing partners sent me this image of the Rosette taken 
> at the WSP last month with an 80 ED refractor. Very impressive for an 80mm 
> scope.
>
>
>
> Many years ago Steve and I worked on our Messier certificates together.
>
>
>
> Steve is an electronics engineer but doubles as a mechanical engineer and 
> can absolutely build anything for a telescope. He has taken many Meade SC 
> scopes and completely rebuild the focuser systems to take out all the 
> "slop".
>
>
>
> He has many scopes including Takahashi's, Astro-Physics, Meade, both large 
> and small, an AP 1200 mount and the list is endless. He mostly observes 
> with 80 or 100 ED and Fluorite refractors...working on deep-sky objects. I 
> find this pretty interesting.
>
>
>
> I know that Fred Rayworth hates small scopes but they really have their 
> place. I like them and I am not a planetary observer. Fred shares the same 
> opinion as John Dobson. I am sure most of you have met and probably have 
> observed with Dobson.
>
>
>
> Back in June of 1996 he visited this area for a few weeks and stayed at 
> several of my friends homes. I/we got to know him quite well during this 
> period. He didn't believe in anything less than a 16-inch scope.
>
>
>
> I know that you may find it hard to believe but I have had better "visual" 
> images of faint galaxies with my 4-inch Vixen refractor than an 8-inch 
> Schmidt-Cassegrain. Why? The better tube baffling, less scattered light, 
> and a "velvet black" background...allowing for superb contrast. It does 
> depend on the galaxy surface brightness and overall concentration of the 
> nucleus and the halo.
>
>
>
> With the 4-inch "some" galaxies would have much sharper edges and much 
> better resolve of faint details. If the galaxy was "very" faint...12th 
> magnitude or fainter the galaxy would be invisible in the 4-inch but would 
> show up nicely in the 8-inch.
>
>
>
> Has anyone in the LVAS had this experience? Small refractor versus the 
> larger but more complicated 8-inch SC?
>
>
>
> Roger
>
>
>
>
>
> Subject: RE: [Lvas] Virgo Cluster Identification
> Date: Wed, 18 Mar 2009 08:18:00 -0400
> From: Steve.Davis at fascontrols.com
> To: drivester at hotmail.com
>
>
>
>
>
>
>
>
>
>
> Roger,
> I posted this to the Yahoo page but you may not have seen it. Heres an 
> image of the Rosette taken at the WSP last month, Just goes to show what a 
> little 80mm scope can do.
>
> Have you ever noticed that there are just some scopes that will never go 
> away:
> 80 & 100 mm refractors, both the 6-inch f/8 & 8-inch f/6 reflectors, and 
> the 8? SCT? classic workhorses..
>
> Steve Davis
>
>
>
>
>
>
>
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>
>
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> End of Lvas Digest, Vol 21, Issue 24
> ************************************ 