The Celestron C90 Maksutov Cassegrain Telescope
Yesterday, 05:00 PM by skyaddict
William Optics Zenithstar 71ED and Twilight I M...
Feb 28 2015 10:53 AM by Ahab
If you want to Master your craft, read Lessons...
Jan 07 2015 11:29 AM by AstroDad
Celestron Ultima 80
Dec 16 2014 05:54 PM by Gianluca67
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For those of you starting out in astronomy, or simply looking for a small portable telescope for quick looks and travel, the C90 deserves further investigation. Indeed, at the price, it is difficult to justify not buying one!
Wow, it’s a match made in heaven! I can observe at the zenith without compromising the controls or OT or going into contortions. As a unit it’s light enough to carry in and out of the house or for reasonable distances. It’s solid, stable and can fit in my car when broken down.
Lessons from the Masters: Current Concepts in Astronomical Image Processing (Springer, 2013.) edited by Robert Gendler is an essential addition to library of every serious astrophotographer. Gendler, who edited this 387 page work is himself a Master of the art and science of astrophotography with a rich portfolio of astrophoto accolades and achievements, including 107 NASA APOD selections. Gendler is a physician by profession and therefore technically an "amateur" astronomer. However he routinely teams with the world's leading professional observatories to create masterful images from their exquisite data sets.
I had the opportunity to observe the sky with this spotting scope during my holidays last Summer. My Father in law happened to own the Celestron Ultima 80 for nature watching and shooting sport and had left the scope at his holiday house near the seaside where I spent my holidays with my family. The sky there is pretty good so you can see 5.0-5.5 magnitude stars with the unaided eye at the zenith.
My first setup was working OK for me. I had a Celestron 11 inch HD scope a Hyperstar, Atik camera and a Celestron CGEM mount. I was getting images that I thought were wonderful and was overall very happy. The one major pain point I had was set up time and accuracy of the mount using was not always a fast fun experience. I found the CGEM mount overall worked well but there were some things that frustrated me which I will not go into here. I also wanted to do more advanced imagery… namely Satellites and Comets and I wanted it to be as easy as possible of course.
From the moment I saw it, to putting it together and using it over 3 months - I have been extremely happy with the Starbase. It costs a bit more than a T-Pod 130 but its specifications are also far greater. The build quality is as good as it gets, the design is engineered well and executed perfectly.
Overall, I really like the Orion XT10g. I give it 4.5 out of five stars. It takes the large apertures, lower cost and simple base of the classic Dobsonian design and upgrades it to allow modern motorized GoTo targeting for a complete newbie. The tracking is very good, and becomes excellent once PAE is performed for a specific section of the sky under observation.
As a testament to the fact that I purchase too many filters, I was given a Chroma LoGlow filter to test. So I've compared it the the Hutech IDAS LPS-P2 filter which many (including me) consider the gold standard light pollution filter.
I really like the WO XWA 9mm. It really has me rethinking trying to buy more eyepieces from this line because even though a 9mm is a heavily used focal length, I think a 20mm would be perfect for my old Celestron C8 SCT. It is just a really crisp and fun eyepiece to use, and if the other focal lengths are as good as this one, this is going to be a real winner for William Optics.