Orion Apex 127mm Maksutov-Cassegrain Telescope
Orion Apex 127mm Maksutov-Cassegrain Telescope OTA
Usually in terms of what you can see, bigger telescopes are better. But bigger telescopes also require bulkier, heavier mounts and tripods to keep them stable, and consequently, an equally brawny owner to lug it around - not to mention more storage space. Enter the Orion Apex 127mm Maksutov-Cassegrain Telescope. It boasts big 127mm (5")-diameter optics but in a telescope tube that's a fraction of the length (just 14.5" long!) and weight (8.6 lbs.) of a Newtonian reflector or refractor telescope of similar aperture and focal length. That's the beauty of the Maksutov-Cassegrain telescope optical design - it's so wonderfully portable. It's those same high-performance optics that give the Orion Apex 127mm Maksutov-Cassegrain Telescope such outstanding image quality and such an incredible range of uses for the demanding observer. It gulps in 55% more light through its multi-coated, 5" meniscus lens than that of a 4" telescope, putting it in the big leagues for astronomical observation and advanced nature study. And the 127mm Apex's long 1540mm (f/12.1) focal length provides 62x magnification with the included 25mm Sirius Plossl telescope eyepiece (1.25"), and lets you push the power up to 250x with optional eyepieces! Bright views of star clusters and nebulas at low power, stunning lunar and planetary detail at higher power - it's all in a night's work for the Apex 127mm Maksutov-Cassegrain telescope. As a daytime spotting scope, it would be hard to find a telescope that is more capable, especially in low-light conditions. It couples quickly to any sturdy equatorial mount or photo-style tripod. Thanks to a built-in threaded 1/4"-20 adapter plate, mounting and disassembly are a snap. Quality is evident not only in the optics of the Apex 127mm Maksutov-Cassegrain, but also in the black-anodized aluminum front and rear castings, the smooth-turning focus knob, and the extruded aluminum tube, with a classy, metallic-burgundy finish. The included 6x26 achromatic, correct-image finder scope features a quick-release aluminum bracket with a dovetail base and two-screw X-Y alignment. For great daytime views with proper left/right and up/down orientation, the included 25mm Sirius Plossl telescope eyepiece slips into a 45??? correct-image prism diagonal, which is also included. You might also be interested to know that the T-threads on the eyepiece adapter allow attachment of a 35mm camera body (with optional T-ring) to the telescope for powerful telephoto photography. As if all that weren't enough, Orion also includes a fully padded, nylon/polyester telescope carrying case, which has plenty of room for additional accessories in the zippered side pockets. Unencumbered with complicated gadgetry like you find on competing models, the Orion Apex 127mm Maksutov-Cassegrain Telescope offers hassle-free, big-aperture performance and convenient portability, at a price that's too good to pass up!
Orion 127mm Apex Specifications
- Optical design: Maksutov-Cassegrain
- Finder scope magnification: 6x
- Optical diameter: 127mm
- Finder scope lens diameter: 26mm
- Focal length: 1540mm
- Focal ratio: f/12.1
- Eyepiece: Sirius Plossl 25.0mm (1.25")
- Magnification with included eyepiece: 61x
- Resolving power: 0.91 arc sec
- Lowest useful magnification: 18x
- Highest useful magnification: 254x
- Highest theoretical magnification: 254x
- Limiting stellar magnitude: 13.2
- Optical quality: Diffraction limited
- Finder scope: 6x26 Correct-image
- Focuser: Internal
- Diagonal: 1.25" 45??? Prism Correct-image
- Secondary mirror obstruction: 39mm
- Secondary mirror obstruction by diameter: 31%
- Secondary mirror obstruction by area: 9%
- Mount type: Optical Tube without Mount
- Astro-imaging capability: Lunar & planetary
- Tube material: Aluminum
- Length of optical tube: 14.5"
- Weight, optical tube: 8.6 lb
- Additional included accessories: Optical tube carry case
- Warranty: One year
Questions & AnswersAsk a Question
What size (series) is the dovetail that comes with the Orion 127mm Apex? Thank you.
Hello, This is Steve from OPT. The Orion 127 APEX has a Vixen-style dovetail on it. We are currently out of stock on the scope but we can order it for you. Thanks.
Will this focuser fit the TPO 8" f/8 Ritchey-Chretien Steel Astrograph? The data on the RC does not specify the thread connection size. And what is the full length of travel for this focuser? Also is the 133mm mentioned in the answer to David's question b
This focuser will not fit directly. The rear mount on the TPO 8" f/8 RC is M90x1 (~3.48" diameter), and the William Optics focuser noted has a standard SCT thread (2.00"-24 TPI). A custom machined adapter would be needed to attach this focuser to the sc
Hi, I purchased this telescope and didn't realize that it would not connect to the tripod that I use for my Nikon cameras. Could you recommend an appropriate tripod for this telescope? Also, I plan to get a T mount to attach a Nikon D70 to the telesco
If your tripod is sturdy enough, you can attach an OS-DM dovetail mount adapter to the top 1/4" screw on your tripod head and then you can slide the rail on the Orion scope into the clamp on the OS-DM. Otherwise, the mount I recommend would depend on if
Which dew shield fits this scope?
I would recommend the Astrozap the AZ-142 flexible dew shield for this model of telelscope.
First, is the vixen mount same as the Celestron CG-5 mount (found on most nexstar OTAs) and Second, will the Orion Apex fit on the tripod used with a Celestron Evolution Nexstar 8" ?
Cindy, The CG-5 mount takes the Vixen style dovetail. Also, the Orion Apex has the Vixen-style dovetail on the tube and if you're referring to the Evolution mount, then it does take the Vixen-style dovetail plate. Thanks.