Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Topics - witchcycsuti

Pages: [1]
Always wondered . . .

If you were in the middle of a nebula, would you even be able to see it under dark skies?

Or would it appear transparent?

Reflectors Telescopes Forum / Newt vs Mak-Newt for AstroPhotography
« on: December 29, 2017, 09:19:16 PM »
Okay gang, I'm posting here rather than the imaging forums because I'm concentrating on reflecting scopes ... specifically a 6" Newt vs a 6" Mak-Newt.

Specs and price are similar, so are there any thoughts on which is easier/better for imaging?

On me; I'm essentially lazy by nature, and not very mechanically inclined. I've owned dobs in the past, and hated collimating them. I only own refractors right now, in a large part because they're easier to use. But, trying to get that aperture and speed in a refractor clashes with my frugal nature. I have a semi-permanent setup in my backyard; my imaging is all narrowband with a CCD.

As I see this, a major difference in these is the Newt is open, so it should cool down faster; the Mak-Newt is closed, so it won't cool down as fast but might hold collimation better.

I'm not convinced I'm going to purchase either, I'm exploring right now. Thanks

What have you done to improve yours, and how well is it working? Post descriptions and pics if you have 'em.

On my GSO 10" dob, I put 3/4" rubber standoffs between the fan and mirror cell (which it mounts to) to reduce vibrations and increase clearance so that air will flow between them. And then cut a piece of black foamboard to cover the rear, with openings for the fan DC jack and the collimation screws.

Now all the airflow comes in through the fan, flows over the back of the mirror, goes out around the mirror edge, and exits at the OTA front opening. And now that the air is actually flowing through the scope, I reduced the fan speed by powering it with 8 to 9 VDC instead of 12.

This didn't totally clear up thermals in front of the primary but it made a huge improvement over the stock arrangement, which was basically just stirring up the air at the center rear of the mirror. There was no airflow, per se. The fan was too close to the mirror for anything to flow.

Attached Thumbnails

Beginners Forum / In search of techniques
« on: December 27, 2017, 09:57:09 PM »
Hi space people,

I am enjoying going out with my binoculars and this site has been so informative.

Here are are two things I am struggling with and would love advice or opinion on.

First and foremost is matching what is viewed with my eyes to what I point my glasses at. For example, I set out to find M52 open cluster. My guidebook said to extend a line from alpha Cass through Beta Cass and continue on for roughly the same distance you see between alpha and beta Cass. Sounds easy, right?

When I put my binos up to start at alpha Cass so many more stars appear. I know that's a thing of beauty but between that and the smaller field of view I'm having a terrible time figuring out who's who up there.

I eventually did it after trying different ideas but would love to hear others' binocular methods.

The second struggle is knowing whether I've found the elusive buggers. I do plan before I go out, perhaps I should take a look at it online or my app so I'll recognize it when I see it? I kinda feel that takes the magic out of it. Any opinions to share on that one?

thanks gang

Beginners Forum / This is what it's all about!
« on: December 27, 2017, 02:10:03 PM »
I am still getting started with this and all you experts are super helpful in my quest in successful observing. This pic is a perfect example of the very reason I purchased our new (vintage) scope. My middle one and I were out braving the cold to catch a glimpse of the Orion Nebula tonight when we finally got a small break in the two week long cloud cover. Glad my kids enjoy such a cool hobby. Had to step back and capture the moment!
Enjoy and happy viewing......

DanAttached Thumbnails

Pages: [1]