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Lion Nebula SH2-132 - RC71

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Posts Made By: Alex McConahay

December 1, 2008 05:10 PM Forum: CCD Imaging and Processing/Deep Sky

4 new shots from the weekend

Posted By Alex McConahay
Looks good, Ivan.

Alex

December 1, 2008 07:43 PM Forum: AstroMart FAQ

What happened to Rosenberg(Mikhail)?

Posted By Alex McConahay
Mikhail has promised to work on his scopes and bring them back to us when they are ready for prime time.

In the meantime, I have pretty much cut off the discussion about it here. I'd appreciate it if that update is about all we need to talk about right now.

Alex

Moderator

December 4, 2008 04:40 PM Forum: Equipment Talk

Lead Acid Batteries?

Posted By Alex McConahay
Sealed has a lot of advantages for batteries that have to be moved around. A drop or two of sulfuric acid really can do damage quickly, and it can happen in so many different ways. Even simply charging a lead acid battery can cause a little leakage if things don't go just right.

By the way--I don't quite understand your statements regarding amp ratings. Are you confusing the amp-hour versus amperage itself?

Alex

December 4, 2008 10:22 PM Forum: Digital SLR AstroPhotography

Eyepiece projection focus??

Posted By Alex McConahay
Is the eyepiece itself in focus? I know it is hard to tell, since the eyepiece is buried in the projection adapter.

Is it that you look like you are getting closer and closer to focus, and then it starts coming out of focus on the other side (without ever looking like it got to focus)? Or as it is coming into focus you run out of travel one way or another?

Alex

December 5, 2008 09:14 PM Forum: Star Parties

Copan International Star Party

Posted By Alex McConahay
I saw no dates....What are you planning?

Alex

December 9, 2008 02:46 AM Forum: Digital SLR AstroPhotography

Question about Flats

Posted By Alex McConahay
Various ways, but my favorite is piece of milk white plastic over the aperture, pointed at a clear blue overhead sky.

Alex

December 13, 2008 03:50 AM Forum: ASTRONOMY

The BIG Moon

Posted By Alex McConahay
A few years back, I wrote a piece for our newsletter. It explains, rather whimsically, why the moon looks larger at times.

You can find it at:

http://www.alexastro.com/Alex%20Home%20Page/Articles/Whythemoonisbig.pdf

There are some other interesting things on my website.

http://www.alexastro.com/

Alex

December 17, 2008 01:02 AM Forum: AstroMart FAQ

Ratings

Posted By Alex McConahay
See over on the left side, under "My Account?"

Click on the "Account Menu."

When there, find "Unused Ratiings tickets."

And take it from there.

Alex

December 19, 2008 05:57 AM Forum: Digital SLR AstroPhotography

A couple of questions

Posted By Alex McConahay
You have gotten good advice.....

Let me add or amplify.

YOu can mount your Canon with any t-adapter-camera adapter that will fit Canon. Unscrew the Olympus T-ring off the camera adapter, and screw in a Canon, and you are set to go.

You can use the software that came with your camera to help automate some of your pictures. Eventually you will want something like Images Plus, which allows you to program in a series of exposures.

Alex

December 19, 2008 05:58 AM Forum: Digital SLR AstroPhotography

A couple of questions

Posted By Alex McConahay
Oh, and depending on the state of charge, and the temperature you are operating at, a battery charge lasts about two hours. You will want an AC adapter eventually.

Alex

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