Buy Orion 120mm f/5.0 Refractor Telescope Optical Tube AssemblyOrion 120mm f/5.0 Refractor Telescope Optical Tube Assembly Product Description:
- Rich-field refractor optical tube assembly with big 4.7" aperture for deep-sky pursuits and wide-field astrophotography use
- 120mm aperture and 600mm focal length refractor provides crisp wide-field views exhibiting high contrast
- Perfectly portable at just 8.6 lbs., makes for a great grab and go telescope
- 2" rack and pinion focuser accepts both 2" and 1.25" eyepieces and accessories
- Optical tube only - mount, tripod, and accessories sold separately
Product Description
This compact, large-aperture refractor is perfect for deep-sky pursuits. Its 120mm (4.7"), multi-coated achromatic lens assembly and modest 600mm focal length combine to provide breathtaking wide-field views. With an optional 25mm Plossl eyepiece, this telescope serves up a sprawling 2.1-deg swath of sky! The fast f/5.0 optical system also makes it an excellent telescope for astrophotography. The 26"-long optical tube is well baffled to ensure good contrast. The cast-metal 2" rack-and-pinion focuser accommodates either a 1.25" or 2" diagonal, so you can use 1.25" or 2" eyepieces. Tube color is gunmetal gray metallic. A mounting base molded into the focuser casting to accept an optional Orion finder scope or EZ Finder II. Sold as tube assembly only without accessories. Includes objective lens cap. One-year limited warranty.
Customer Reviews
Most helpful customer reviews
8 of 8 people found the following review helpful.
My favorite scope
By E. phairas
If you know what to expect this can be that dream scope you've always wanted. Lightweight, sharp, bright views, and decent high power. All of that is right here.I like to think of this scope as one half of a binocular telescope.I am so glad this is offered as an OTA which allows me to build it exactly as I wanted. I mounted it with 114mm Orion rings and 8" dovetail to a Skywatcher AZ4 steel tube tripod. Almost overkill for this scope but the two just seem made for each other. Very solid and just the right height for sitting in your comfy chair and scanning the skies. I want to list exactly how I configured the scope. For me this is about as perfect as it gets unless somehow this became an APO scope. I tried to stick to Orion products when I could.1) Orion dual speed Crawford focus. The Orion upgrade instals in a minute and at all powers just make finding focus easier and the viewing experience more enjoyable. Very smooth all metal focus.2) Orion dielectric 2" star Diagonal. With only 120mm you don't want to lose any brightness with a standard mirror diagonal and you absolutely must get the 2" because it allows you to enjoy the wide fields of view this scope can give you.3) Orion 2x barlow. This is all you will need as anything over 200x and this scope will have reached it's seeing limit anyhow.4) Orion V-block anti fringe filter. Instal this on your barlow because that is the only time you will need it. Over 100x or so and the image will begin to blur from Chromatic aberration of this F5 acro. This filter does a good job of clearing it up. For example, at 220x without this filter, the Cassini Division in Saturn's rings was blurred away. With the filter I could easily see it. Nuff said me thinks.This scope loves wide AVOF eyepieces. You are cutting yourself short if you only use standard plossls. So for this scope I choose the Meade Ultra Wide Angle series 5000 eyepieces. these are the Meade Series 5000 UWA Eyepieces I use for this scope.1) 30mm (20x) This gives me a larger VOF than my Celestron 20x80 binoculars! Plus is matches the exit pupil to your eye at about 6mm. No need for a finder scope for this Orion, 30mm eyepiece is your finder scope!2) 8.8mm (68x) By itself it's amazing, barlowed it gives you 136x. With the V-block filter this is the sweet spot of this scope. This is where it's going to be the sharpest high power views. Saturn is amazing at this power.3) 5.5mm (110x) this is about the limit of the non-filtered view of this scope. Beyond this CA will become strong enough to muddy the view. But on nights of good seeing you can barlow this to 220x and with the V-block filter on your barlow the views are nice and sharp. Maybe not perfect, but pleasing.I have already found many faint fuzzies just casually scanning while in the backyard and that is in Las Vegas! Probably about the worst light polluted skies in America and this scope can still see those fuzzy cotton balls in the sky.. LOL I can't wait to see what this scope can do under a dark sky!EDIT: tonight with the 5.5mm I was able to see the Ring Nebula (M57) and make out dark hole that makes up it's center. The Andromeda Galaxy and it's faint companion were both in the FOV at the same time at 110x. The galaxy was a large smokey patch. If I starred long enough at M15 I could swear I could see that it was a dense ball of stars. All of this was in Vegas under light polluted skies.
1 of 1 people found the following review helpful.
Excellent scope.
By Matt
Great scope, strange sticky grease used on focuser which is exposed. Requires a diagonal, as there is not enough focus travel to use an eyepieces straight through. For those who do not own an additional diagonal, eyepiece, telescope rings, etc., strongly consider buying the whole package as you get all these items, plus a tripod and eyepieces for an additional $180ish.Although the scope does suffer from chromatic aberration, as expected, it displays wide field views exceptionally well. Used in conjunction with my C11, I found the views of Jupiter to be quite similar under the same magnification, albeit with a bit of purple fringing. In short, compared to my C11, I thought this to be a great first (or last) scope.
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