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M20 Trifid Nebula in LRGBHa

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Posts Made By: Alex McConahay

December 25, 2011 07:26 PM Forum: Equipment Talk

Need help with new Sirius Mount...I'm an idiot, so

Posted By Alex McConahay
I am surprised that solar system is not an object.....did you look under "Solar System" objects.

At any rate, if it is not listed, just use your directional controls to move the scope up/down/left/right till it points at the sun. Nobody needs goto to locate the sun.

Now, I am assuming you have the mount aligned to polar North when I say this. If you do, and use the directional buttons to go to the sun, it will stay on the sun for some time.

Alex

December 26, 2011 05:38 PM Forum: Astro-Physics

Aligning A-P Mach1 GTO

Posted By Alex McConahay
Kelly,

Are you talking about a mount that is permanently on a pier? And it was polar aligned last time when you left it, but not this time when you tried it again?

Or are you setting it up anew this time?

Alex

December 27, 2011 03:43 PM Forum: Beginning Astronomy?

field reduction factor

Posted By Alex McConahay
The reduction factor really means nothing in astronomical use. When DSLR's were first being sold, it was used to help a buyer translate how a lens designed for a full fralme 35 mm camera would work on a DSLR.

A standard 35 mm frame has a diagonal of 55 mm. A "normal" lens--the 55 mm lens that was traditionally the main lens sold with a 35 mm film camera--is designed to cover just this area. The perspective, etc. was designed to look like it does to the regular human eye-brain vision system. However, the DSLR sensor only covered a portion of that full frame. What it did not "see" was considered a "crop." It was as if you had taken the center section out of the full 35 mm frame. When you do this, and blow it up to the full size 8x10 print, then you are in effect, magnifying the central subject. The finished picture would look just as it might had you used a longer telephoto lens on the original picture. The 1.6 factor (Common in many DSLR's) is the difference between the normal lens and the telephoto lens focal length.

Alex

December 30, 2011 06:58 PM Forum: TeleVue

TeleVue Sale?

Posted By Alex McConahay
I heard from somebody in the know that the price of an NP 101 is going up after the beginning of the year.....

That's all I know.

ALex

January 4, 2012 05:45 PM Forum: Landscape Photography

Yellowstone Winter

Posted By Alex McConahay
By the way--maybe you can answer a question for me.

Do they keep the same schedule for Old Faithful, going off once an hour on like on its summer schedule, or is there a winter schedule?

I always figured they could cut back to where they only have it maybe only once every four hours or so.

Seems to me that's a way to keep government spending down, not wasting money on the display every hour when there are not so many tourists there......

Just wondering.

Alex

January 4, 2012 11:47 PM Forum: AstroMart FAQ

No shipping address?

Posted By Alex McConahay
I assume you have tried to contact him through emails, etc....
Try the personal communication through "Message Inbox" here on Astromart--your emails to him may be getting blocked.

Alex

January 9, 2012 07:33 PM Forum: Telescope Making

Edmund Scientific 12 1/2" F6 Mirror

Posted By Alex McConahay
If you are ever in California, give me a call, and we'll test it on the Focault tester.

Alex

January 11, 2012 01:52 PM Forum: Beginning Astronomy?

more basic ATM stuff in Nairobi

Posted By Alex McConahay
Cool. Hope the kids get a lot out of it.

Alex
:S

January 19, 2012 06:47 AM Forum: AstroMart FAQ

How do I unhide a forum...clicked the wrong thing

Posted By Alex McConahay
In the upper right hand corner of the main Forums page, you will see "Display all Forums." Click it. Once you can see all the Forums, go to the one that you want, and click on the "Unhide" choice.

Alex

January 20, 2012 01:00 PM Forum: Off Topic Discussions

Another One Bites The Dust

Posted By Alex McConahay
You heard the expression--

"Drone strike killed the #3 man in Al Qaeda four times last year."

We keep making the drones, and they keep getting new #3 men!!!

The beat goes on.

Alex

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