Image of the day

Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Walter Hamler

October 9, 2015 12:57 PM Forum: Equipment Talk

Diagonals

Posted By Walter Hamler

Some good data here but I would like to hear from some as to actual observational results. I recently took an extended trip out west with telescopes, and got in some observing, but not as much as I wanted! While enjoying a very good night in the Badlands, SD, I did a short comparison of some diagonals on my C 9.25. The celestron 1.25 prism, a Baader 1.25 prism, a Williams 99% 2" and a Antares SCT 2" that was marked 98%. After an hour or so viewing two open clusters (double cluster and NGC 7789) with all the diagonals and 2 different Explore Scientific ep's, I could not see ANY differences in sharpness, light levels, vignetting, etc. Now admittedly I was not using instruments, just my surgically enhanced eyeballs. I am 73 and recent cataract surgery has restored the eyes of my youth 8) Well, almost! But the point, at least in my limited abilities, I really could see little to no difference in the views. I honestly was a little disappointed, especially after paying for the Baader. I really concentrated on seeing a difference between it and the Celestron 1.25 that came with the scope. There was none that I could detect.

Comments/examples would be appreciated.

Walt

December 25, 2015 02:10 PM Forum: Equipment Talk

"Equipment" In Sixty Seconds...

Posted By Walter Hamler

8O
Crazy!!! How does Santa navigate that stuff!!

December 27, 2015 10:26 PM Forum: Beginning Astronomy?

Opinion: 6" Achromatic vs 8" "AFC" SCT

Posted By Walter Hamler

I have often said that the best general purpose scope is either an 8" f/6 dob or an 8" sct. If you are not into imaging and primarily visual either will work although wide fov is difficult in the f/10 sct. A .63 reducer helps a lot however.
If any type of imaging is desired then a good APO refractor is the ticket, 80 to 130mm typically. These are pricy however and require a better than average EQ mount for successful photo's. Since you are new to the endeavor I would say go with a dob and use it to learn the sky and your viewing technique and preferences. Also, find an astronomy club nearby that is active and join. You learn faster and better when you can share experiences.

Walt

December 30, 2015 01:44 PM Forum: Mounts

January 6, 2016 07:42 PM Forum: Equipment Talk

Need machined part. Are there any machinist that a

Posted By Walter Hamler

Can you do a CAD drawing to show what you need, with dimensions.

Walt

February 16, 2016 06:51 PM Forum: Equipment Talk

Re: Astronomy Equipment for Sale

Posted By Walter Hamler

At the very least post some pics here and that could be a start.

Walt

March 8, 2016 09:06 PM Forum: Mounts

CAses for my AP900

Posted By Walter Hamler

Got a link?

Walt

March 27, 2016 03:23 PM Forum: CCD Imaging and Processing/Solar System

Jupiter 3/22/2016

Posted By Walter Hamler

Very nice!

Walt

May 7, 2016 12:25 PM Forum: CCD Imaging and Processing/Deep Sky

Realm of Galaxies

Posted By Walter Hamler

I was observing with my C 9.25 last evening. Skies were 98% clear with some high level haze but otherwise good. Lots of light pollution. I recalled your post with wonderful pics so had to see if there was a chance to see them. Under dark skies I have observed that region several times, but never tried from my backyard. With a 30mm ES 82* afov ep giving slightly over 1 degree field, I sent the scope to M86. By cupping hands over the ep and eliminating stray light I was able to barely see the three bright ones at the top, M86 being the bottom of the three, I am assuming. Don't know how much light pollution you are dealing with, but here the skies are mag 4 at best overhead.
I would say ya done good!

Walt

June 19, 2016 08:33 PM Forum: Equipment Talk

C-90 focusing question

Posted By Walter Hamler

It is a helical focuser. If the front part of the tube turns and lengthens it is a single helical. If it does not turn but lengthen it is a double helical type.

Walt