About Airplanes & Rockets

Kirt Blattenberger, Webmaster - Airplanes and Rockets
Kirt Blattenberger
Carpe Diem!
(Seize the Day!)

Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD. There is a lot of good information and there are lot of pictures throughout the website that you will probably find useful, and might even bring back some old memories from your own days of yore. The website began life around 1996 as an EarthLink screen name of ModelAirplanes, and quickly grew to where more server space ...

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Celestron CPC Deluxe 800 HD Telescope

Supermodel Melanie with Celestron CPC Deluxe 800 HD Telescope and accessories - Airplanes and Rockets
Tripod legs fully retracted and the equatorial wedge is NOT installed. Melanie is holding a yardstick for size reference.
Celestron CPC Deluxe 800 HD - Airplanes and Rockets
Tripod legs fully extended and the equatorial wedge IS installed. Melanie is holding a yardstick for size reference.

It only took 32 years, but I finally have the telescope I have dreamed of having since first peering through an 8" Celestron telescope at a meeting of the Macon Astronomy Club of Macon, Georgia, while stationed as a radar maintenance technician at Robins AFB, Georgia. In September 2012, I made the decisions to purchase Celestron's high-end CPC Deluxe 800 HD telescope. It is a fine piece of work. A year and a half ago I bought the Celestron NexStar 8SE telescope as my first scope in 20 years. At the time it did not seem prudent to spend north of two thousand dollars on a telescope when I didn't know for sure whether the enthusiasm would still be there after so long. The single arm of the NexStar 8SE mount gave me pause, but after reading comments by many people on some of the astronomy forums, it seemed to be good enough for casual observing and entry level astrophotography, and indeed it was.

Many sessions have been spent out in the yard with the NexStar 8SE, re-familiarizing myself with the night sky and even taking some pretty darn impressive (for me) pictures of Mars, Jupiter, and Saturn using the Celestron NexImage camera and RegiStax software. At first I was a bit disappointed with the GoTo and tracking on the NexStar 8SE, but the more I worked with it, the more I realized that most of the issues were due to my not properly leveling the tripod and/or not having the alignment stars exactly in the center of the reticle eyepiece when pressing the Align button. Because of the single arm on the mount, it was sensitive to winds more than a few miles per hour, and under high magnifications (17 mm eyepiece or smaller) it was difficult to focus while holding onto the focuser knob. The solution to focusing was to add a JMI electric focuser so that I never have to touch the telescope.

Eyepiece case, software, and cables.


Dew shield installed.

Lfft side.

Celestron Pro DH Equatorial Wedge - works with up to 11" telescope.

Front view.

Right side.

NexRemote and USB-to-Serial software and cable.

Close-up of eyepieces and filters with readable numbers.


Power Tank & cable.

Bahtinov Mask.

Celestron NexImage5.

Orion 20 mm illuminated reticle eyepiece.

All the included paperwork and software.

Back view.

Corrector lens.

Celestron Baader solar filter.

After much deliberation, I decided that a higher-end instrument would be required to do more than just casually peruse the heavens, so the CPC series was the definite choice; it was just a matter of whether to spend the extra few hundred dollars for the Deluxe HD model. I could not find a whole lot of particulars about the Deluxe HD on forums, so I sent a note to Celestron asking if there is any difference between the optics and/or the mount. The response was that the Deluxe HD has the coma-free optics and removable secondary mirror for f2 photography, and that the drive system is improved to facilitate professional level photography. So, I figured the additional $400 was worth the price. The rest, as it is said, is history.

Right after paying for the telescope, I bought a Feathertouch SCT MicroFocuser because it comes so highly recommended by users on forums. I made a short video showing the focuser installation; it took less than 7 minutes from beginning to end. Unfortunately, the skies have been cloudy every night since I got it and therefore I have not been able to test it. Looking at terrestrial objects during the daytime shows that it seems to be rock steady during focusing with the 10:1 knob. Even with the 1:1 knob and the original rubber knob, the robustness of the two-arm fork mount and the much heavier mount base proves to be much steadier on the CPC Deluxe 800 HD telescope than with the NexStar 8SE telescope. Considering that the NexStar 8SE costs $1,199 and the CPC Deluxe 800 HD costs, $2,499, you should expect a much sturdier and steadier instrument... and you definitely get it!

I plan to write many comprehensive reports about the CPC 800 Deluxe HD at opportunity, i.e., aka a clear sky, permits. Let me know if you have any questions or comments.

First light for my CPC Deluxe 800 HD was September 24, 2012.

Click on any of the images here for higher resolution versions.

The main feature is the incredibly robust and high quality CPC 800 Deluxe HD telescope. I had an 8SE before this, and the comparison is like night and day. Whereas the 8SE was very shaky because of its single support arm and getting a good alignment was sometimes tricky, the CPC 800 Deluxe HD is solid as a rock and achieves an excellent alignment every time with very little effort.

The tracking in alt-az mode is very precise and utterly sufficient for short exposures like for planets, the moon and the sun, and for visual observing for any length of time. However, long time exposures require operation in the equatorial mode in order to prevent light trails due to the Earth's rotation. That is where the heavy duty Pro Equatorial Wedge comes in handy. It easily mounts between the tripod and the base of the standard alt-az dual fork mount. I have been amazed at how long the telescope will track in both modes when a careful alignment is made.

A good quality 1.25" eyepiece and color filter set is included to provide very nice visual observations of planets, nebulae, galaxies, and clusters. Eyepiece focal lengths are 6 mm, 8 mm, 13 mm, 17 mm, 32 mm, and 40 mm. The Pleiades just fit into the 40 mm field of view. It also has a 2x Barlow lens and a NexImage reducer lens.

I also added a sky glow filter and Baader solar filter made by Celestron to fit this telescope. The Baader, in covering the entire input aperture, is the only safe method of solar observing since it prevents the possibility of heat build-up inside the tube. Seeing sunspots real-time is very cool. BTW, finding a Baader filter that fits the CPC 800 telescope is very difficult.

The Celestron NextImage 5 video camera (5 Mpixels) records excellent video files for use with stacking software like the free RegiStax software. It is meant only for photographing very bright objects. You cannot do nebulae or dim clusters or galaxies. For that, you will will need a good DSLR camera (not included).

Video: Installing the Feathertouch SCT MicroFocuser on the Celestron CPC Deluxe 800 HD Telescope - Airplanes and RocketsHere is a video I made of installing the Feathertouch SCT MicroFocuser on the Celestron CPC Deluxe 800 HD Telescope.
The factory-supplied focuser is very good, but I wanted super-fine focusing ability so I installed a Feathertouch SCT MicroFocuser. It is a very highly acclaimed focuser. A video of the installation process is included here (the manufacturer uses my video on their website).

Two other niceties are the tripod vibration dampers and the dew shield (not heated). Prior to using the dampers, vibration from cars passing by on the road about 50 feet from my observing location was noticeable. Using the dampers completely eliminated the annoyance. The dew shield eliminates the nuisance of condensation building up on the corrector lens at the front of the telescope.

A 20 mm illuminated reticle eyepiece is a big help in getting a good alignment since it allows you to get your reference object precisely in the center of the field.

An AC/DC converter comes with the telescope, but I also bought the 12V Power Tank battery supply in order to avoid interruptions from line voltage dropouts. The CPC Deluxe 800 HD will run for many hours on a charge.

Also included with the telescope is a serial computer interface for controlling the mount remotely with the included NexRemote software.

Finally, although I never had an occasion to use it, I bought a Bahtinov Mask for aiding in obtaining a sharp focus with a camera.

Power Tank, vibration suppression pads, and dew shield are included as well.



Posted September 29, 2012