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Sculptor Galaxy (NGC 253)

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Posts Made By: Alex McConahay

March 31, 2008 11:15 PM Forum: Meade

lens corrective

Posted By Alex McConahay
Aurora,

What is the problem with your telescope?

I cannot tell if you are trying to clean a corrector plate, or re-align it (move it around to better match it to the primary).

Alex

April 4, 2008 12:31 AM Forum: Equipment Talk

My new pier.

Posted By Alex McConahay
Dang, I hope it fits....cause if it doesn't......


ALex

April 6, 2008 07:57 PM Forum: Solar System Observing

Solar Scope

Posted By Alex McConahay
Have you looked into Lunt? They seem to be making big promises, and I suspect they will be delivering on them.

Alex

April 7, 2008 10:49 PM Forum: AstroMart FAQ

Problem with classified mail..

Posted By Alex McConahay
David,

Do you have an active ad? What number is it? I will try it and see what happens.

Alex

April 10, 2008 06:45 PM Forum: Equipment Talk

Solar filter for my Astroscan?

Posted By Alex McConahay
In general, you should avoid filters at the eyepiece for solar viewing. They can break quickly and catastrophically, causing blindness. (or so it is often described--I've never seen it happen, but I know of nobody who has used one.)

Your best bet is a piece of baader solar film. YOu can make a holder for it to fit snugly over the front of your scope for roughly thirty dollars, max, I should figure.

Alex

April 13, 2008 05:12 AM Forum: Equipment Talk

Need info for concrete scope pads

Posted By Alex McConahay
You actually want to minimize the amount of concrete you use. So, have you considered six or eight smaller pads instead of one large pad.

Also, think about whether you want your members to cart their stuff to the pads, or back up to them and put their tailgates down?

Consider that large Dobs may require ladder space as well as room for the scope.

Alex

April 14, 2008 02:18 AM Forum: Equipment Talk

Mounts and Weatherproofing

Posted By Alex McConahay
I found this quite helpful

http://home.roadrunner.com/~alexmcconahay/Equipment/outhouse/outhouseindex.html

it is relatively easy to do, and quite effective.

Alex

April 14, 2008 01:36 PM Forum: ASTRONOMY

Stephen Hawking lecture

Posted By Alex McConahay
We got to the line at 6:30. As we entered the overflow auditorium, there was a person counting us. Just after the last of our party entered, I heard he say "Okay, Three more....." So, we apparently hit it just right. Another five minutes and we would have been outside.

Alex

April 17, 2008 02:31 AM Forum: CCD Imaging and Processing/Deep Sky

good exposures

Posted By Alex McConahay
Mike,

I don't think there is one answer to that.

In addition to the excellent answers you have gotten here, you have to factor in skyglow. When I am at a dark sky site, I'll go for five minutes. In my suburban back yard, I cannot use more than two.

Alex

April 27, 2008 06:57 PM Forum: CCD Imaging and Processing/Deep Sky

sky brightness, signal depth

Posted By Alex McConahay
Isn't this what "Normalizing" and exposure is for?

Alex

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