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Secure wall mount bracket for Hisense 42 and 50" Plasma TV models 15 degree vertical tilt mechanism, heavy duty steel construction supports up to 120 lbs only 3/4" deep when folded flat
Product Description
The Advanced Series telescopes offers features and quality that serious amateurs can appreciate. These scopes come on heavy-duty German Equatorial mounts with ultra-sturdy 2" stainless steel legs and center tray for superior rigidity and vibration dampening. These telescopes are carefully designed for the more advanced astronomer and feature exquisite optics on a heavy-duty mount. The optics of this telescope are made to exacting standards, with high quality materials to ensure top performance. The C4-R offers a 63% increase in image brightness over 80mm models, with the larger aperture delivering incredible images of the moon; Saturn and its ring structure; Jupiter and its belts; and hundreds of deep-sky objects, including galaxies, nebulae and star clusters. The C4-R is mounted on the CG-4 mount. The mount features precision gears for extremely smooth motion. A counterweight, latitude scale, setting circles, and slow motion controls on both axes are standard, so you have a fully loaded telescope right from the start.
Amazon.com Review
The Celestron C102HD telescope is regarded as a major bargain for good reason. Instead of computerized bells and whistles, you get the solid optical performance of a full sized four-inch achromatic refractor combined with a serviceable German Equatorial mount. Experienced observers frequently recommend the C102HD to beginning astronomers for one simple reason: it delivers great views of the planets.
How great are the views? In side by side tests, the C102HD consistently showed better contrast and more detail on Jupiter and Saturn than my five inch Schmidt-Cassegrain. On a night when my C5 showed five or six cloud belts across the face of Jupiter, the C102HD showed seven. On Saturn, when I push the magnification to 200X, the Cassini division is crisp, I see cloud belts on the planet; I see shading in the A and B rings, and even glimpse the Crepe ring. When looking at the star Epsilon Lyrae, the famous double-double, the C102HD showed me four crisp bright beads of light, without the bright diffraction rings and scattered light that I see in my C5.
One drawback: the CG-4 equatorial mount included with the C102HD is only barely adequate to support a forty-inch plus telescope. I found that it was better to set up on grass or gravel and leave the tripod about a foot short of full extension--this significantly reduces the vibration problems that otherwise trouble this mount.
What accessories would I recommend? Adding a CG4 motor drive significantly increased my viewing pleasure by allowing the telescope to track for long periods without my touching the controls. As with any equatorial mount, you need to point the Polar axis at the North Star, Polaris, for the tracking to work properly (don't worry, this is all explained in the manual). As for eyepieces, the included 20mm plossl eyepiece gives a magnification of 50X and a one degree true field of view. You'll want a 32mm eyepiece to take in the full view of star clusters like the Pleiades and the Double Cluster in Perseus. The Ultima 7.5mm is ideal for high power views of Jupiter and Saturn. I usually suggest a good star chart with any telescope, but for viewing the planets, a subscription to Sky and Telescope magazine might be even more useful; the planets, after all, move from one month to the next! --Jeff Phillips
Pros:
- Solid optical performer
- Great views of the planets
Con:
Amazon.com Product Description
The large aperture of the Celestron C102HD Telescope gives you clear images of the lunar surface, Jupiter's belts and moons, and the rings of Saturn, as well as hundreds of deep-sky phenomena like nebulae, galaxies, and star clusters. In addition to viewing the sky, you can use the C102HD for terrestrial observation; use it in your backyard or take it out in the field for close-up views of your natural surroundings.
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Refractors |
This is a refractor telescope. Refractors (also known as a dioptrics) capture light with a lens at the front of a long tube and send it to an eyepiece at the other end. They look, in other words, just like what most people think of when they hear the word "telescope."
Refractors offer--potentially, at least--the cleanest images of any telescope design. They are simple and reliable (the sealed tube is maintenance-free), and are good for both celestial and terrestrial viewing.
Read more about different telescope designs in our buying guide | |
This telescopes is carefully designed for the more serious astronomer and terrestrial observer and feature exquisite optics and precision, heavy duty mounts. The optics are made to exacting standards, with high quality materials to ensure top performance. It offers a 63% increase in image brightness over 80mm models, with the larger aperture delivering incredible images of the moon; Saturn and its ring structure; Jupiter and its belts; and hundreds of deep-sky objects, including galaxies, nebulae and star clusters.The altazimuth mount is easy to use and has slow motion controls on both the R.A. and DEC. axes. These controls are on flexible cables, to allow for quick and easy pointing and tracking.For terrestrial use, you can enjoy views from your own backyard or take your telescope out in the field to enjoy the natural environment, up close.The C102-HD is mounted on the CG-4 mount, a very rigid German equatorial mount. A counterweight, latitude scale, setting circles and slow motion controls on both axes are standard.
Moon viewing 101
The moon is often one of the first celestial objects a beginner will look at through his or her telescope. Here are a couple hints for you once you get your hands on your new C102HD.
Often, it is tempting to look at the Moon when it is full. At this time, the face we see is fully illuminated and its light can be overpowering. In addition, little or no contrast can be seen during this phase. One of the best times to observe the Moon is during its partial phases (around the time of first or third quarter). Long shadows reveal a great amount of detail on the lunar surface. At low power you will be able to see most of the lunar disk at one time. The optional Reducer/Corrector lens allows for breath-taking views of the entire lunar disk when used with a low power eyepiece. Change to higher power (magnification) to focus in on a smaller area. Choose the lunar tracking rate from the NexStar's MENU tracking rate options to keep the moon centered in the eyepiece even at high magnifications.
Customer Reviews:
Very impressed.......2007-12-28
Product was shipped on time, in perfect condition. No missing pieces, everyhting is beautiful. This is a great telescope, the lens it comes with is great for looking at stars and a few different nebulas, but for great planetary and stellar veiws as described in its description, buy a new lens, preferably a 5.0 or 4.5.
An Unbelievable Bargain .......2007-10-24
I am a long time amatuer astronomer over 35 years. I have and still own 8 telescopes including a Meade 102mm refractor telescope and a 10" reflector. The optics in this scope are excellent and outperform the Meade 102mm refractor I own that retailed for $999.00. On my first night out I saw the Andromeda Galaxy, The Ring Nebula, M-13, and cloud bands on Jupiter. I cant say that the images were brighter than thru my Celestron C-8 but they were sharper. The stars just snap right into focus. The scope was very slightly out of colimination when I recieved it. Judging the looks of the carton, UPS used it for a battering ram and step ladder. It was packed well enough to arrive safely. My only disapointment is with the motor drives and the assembly instructions. The assembly instructions would be useless to a novice. The declination axis was out of adjustment and had a lot of backlash as shipped. When I purchased the dual axis drive it gave clear instructions and tools for adjusting the backlash. It is to bad Celestron didnt have the foresight to provide this information with the assembly instructions I suspect the reviews of this scope would not have so many shaky mount complaints. I suspect if you are having shaky mount problems with this scope this is the cause,as it took a fair amount of time to adjust the backlash out of the mount. The factory in China is probably under to much production pressure to take the time required to do it right. After that adjustment vibrations of the mount dampen out in 2-3 seconds and is very good at high magnifications. The Motor drives are another review. This telescope is an unbelievable bargain, I never thought I would ever own a large refractor of this quality because I wasnt willing to pay 1000.00 dollars or more and before Celestron provided this product that is what an instrument of this or lesser qualty cost! My 102mm Meade is built like a tank and is very impressive looking next to this Celestron, but it optics dont come close. This Is A Fantastic Bargain!
Celestron C102HD 102mm Refractor Celestron C4-R.......2005-03-10
Ordered The C102HD but believe this is the newer version Celestron C4-R. On just one night of viewing, conditions hazy, Still able to view one of my favorites, Saturn. Cassini division easily visible, nice image at 160X, used one of my own eyepieces 12.5mm plus 2x short focus barlow. A band stood out and well wrapped around the planet. Did not notice any Chromatic Abberation on Saturn. The optics on this 4 inch objective are impressive for such a value priced telescope ! The Mount works very well goes and stops were you want it, the tripod is aluminum, not the stroger tube variety, making the works abit shaky, but otherwise supports well. Another favorite Jupiter started to rise but conditions changed to heavy overcast before I could give a better rating, the two large bands were well separated and detail was starting to appear then clouds moved in. Jupiter did produce some color distortion but not that objectionable to me. Only star tests were Sirius (brightest star in the heavens) and the companion to Polaris (North Star). Sirius did show some of chromatic abberation but not all that bad, Polaris at 160X was satisfying with its blue companion well placed. Managed to view a few open clusters but again sky conditions not favorable, will update in future. UpDATE: Yet to reach a dark sky, intown viewing, the famed Orion Nebula, beautiful flower-like, couldn't resist 160X on the also popular Trapezium (4 tight stars inside the Orion Nebula), actually an overkill at this power, stars filled with black between them, Very Nice! Just above the three star belt of orion is a fainter M78 Nebula,is much smaller, noticeably brighter than the ETX90.
Update: At last a view on Jupiter tho low in the sky above tree level, witnessed a Jupiter Lunar Shadow Transit, beautiful shadow at 160X ! Also for the first time detected a Jupiter Lunar Transit, the actual moon abit more difficult to see but was there ! You can find time tables on these events but a nice program called JupSat Pro keeps you posted in nice visuals and in real time, as well as when to view the Great Red Spot !
The Great Red Spot, actually saw the white area bulging around it, as unfiltered, spot not obvious but was a beautiful visual. Next night a small star party, one seasoned observor, thought he saw the Encke, I could see the Crepe Ring over the planets surface. Saturn is always a crowd pleaser and the new observors gasped as the Magnification was increased in increments of 50X, 100X, to 160X. Cassini was evident for all viewers.
Update: Famed Globular in Hercules M13 was simply majestic, huge even in the 20mm 50X eyepiece, abit higher power as 100X started to break down into stars just off center, averted vision gave clue to its beauty ! Well located objects easy for me but ones alone as M5, again another Globular, tho smaller, I was unable to locate, will invest in 60mm Finder and should help solve my delema. One of the holding rings on the telescope has the standard bolt to fasten a camera or in may case, the larger finder ! Already have fastened my PST Coronado (Solar, Sun, Telescope, Hydorgen Alpha Images as solar promences erupting from the sun), on windy days this works beautifully, can check review on this amazing item under my other reviews. Note Never Look Directly At The Sun Through Any Telescope Without The Required Filters, As Will Cause Permenant Eye Injury Or Loss!
Wish to say this is indeed a wonderful value telescope, looking forward to planetary sessions which this unit will surely excell, also the brighter deep sky objects will keep you busy. Have only an ETX90 with Autostar to compare images, the ETX might be abit sharper, but the 4 inch unobstructed objective quickly passes giving some beautiful viewing pleasure. This is not a highly portable telescope as is the ETX, but you can muscle the 40 plus pounds fully assembled short distances, very reason I personally like the smaller scopes, but the 4 inch adds more muscle in aperture as well. Would give this a higher rating except for the tripod. Deserves a 5 Star rating in Value Tho !! I'm excited about the whole system, would suggest a 6 to 7 mm eypiece as the medium-high powers seem to excel, looking forward to pushing the higher envelope (power) when conditions permit. Out of the box, this unit will be hard to beat in this price range !!
WoW.......2004-04-11
I finally had a clear night although it was a bit on the windy side, and I was very impressed with the performance of my C102HD refractor. I have never really had a real Telescope I alway's Fell to the ads of those high powered store sold 60mm. refractors, those are junk. I saw more on that one night than I have all of my life, I saw the Orion Nebula for the first time,it was great at 50 power with the 20mm. eyepiece, also the moons of Jupiter were very sharp plus the rings of Saturn, I also bought the Celestron accessory kit so I have plenty of options when it comes to power. I just can't say enough to express my delight with my new scope and probably can't say it right. But this a real quality item,and amazon.com is a great place to purchase it, they have great service and the scope came very well packed. So I would really recommend one of these scopes you will really be pleased and amazed at it's performance.
Every bit worth the wait!.......2001-12-05
I used to work on 10" and 12" refractors and in comparison this scopes only lacks in size. I started running around in circles after looking at the amazingly sharp views of Saturn, Jupiter, the Moon, and the Orion nebula the first night. Stars are sharp pinpoints. Plan to buy additional eyepieces as this 20mm Plossl (pretty decent per se) is just a starter. My 6mm eyepiece works beautifully at 150x. With the 2x Barlow lens, the 20mm gives you 100x. In a light polluted city (like where I live), the best I could get was around 200x.
I saw the Cassini division and bands on Saturn, bands on Jupiter and its 4 moons as pinpoints of light. The full moon gives a purple halo, but only at high mags. A moon filter solves that problem. The finderscope takes some fussing with the get it centered and the mount is VERY shaky. I plan to buy a better mount anyway. From reading other scope review sites and from my personal experience, this Celestron 102HD is a definite ***** winner. Everywhere I asked, "pro-amateurs" were telling me its the perfect scope for a beginner. Its still very portable - just carry the weights separately out to the field/backyard for viewing. From a beginner's perspective, to really learn how to navigate the stars, this scope gives you the best bang (optics) for the buck as opposed to smaller apertured GOTO scopes (ahem Meade 90etx) for the same money. You won't be disappointed!
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