Explore Scientific Carbon Fiber ED127 f/7.5 Air-Spaced Triplet Apochromatic Refractor
The Explore Scientific 127mm f/7.5 Air-Spaced Triplet ED APO produces a visual experience that is often compared to much larger aperture reflector telescopes. The contrast and resolving power can reveal stunning detail on planets and deep sky objects alike.
The designers of the Air Spaced Triplet ED Apo Series pursued to produce top-quality refractors with lasting value. The optical solution was to provide a traditional air-spaced design mounted in a rugged, adjustable lens cell. This design, shaped from experienced craftsmanship and polished from genuine HOYA™ FCD1 (Dense Fluor Crown) ED (Extra-low Dispersion) glass, a critical element to produce images that refractor afficianados know can only be obtained with a high-quality true apochromat.
The owner of an Explore Scientific ED Apo will appreciate the attention to detail and the standard hardware which includes a precision two-speed focuser, a 2" 99% reflective dielectric diagonal, and a deluxe case.
All Explore Scientific ED Apochromatic Refractor telescopes include a precision Ten-to-One, Dual-Speed Focuser as standard equipment. The eyepiece holder uses a compression ring to prevent the eyepiece or camera barrel from scoring.
Exploring the fine features around the Moon's Hadley Rille will put to test observing skills of any astronomer as well as precision of telescope optics. Better optical quality dictates more precise focusing.
This is especially true when observing at high magnification or when making CCD images. With a standard focuser, you will find that a tiny nudge will throw out focus and turn your night into one of frustration.
So Explore Scientific included as standard equipment, on all ED Apos, a ten-to-one, two-speed Crayford-style precision focuser with tension adjustment and lock to obtain and hold perfect focus. They think you'll agree that such precision is worth it.
Explore Scientific precision collimates every Explore telescope at their factory to give optimum performance. Although you may never need to adjust optical alignment, the ED Apos allow for optical centering to collimate the lens elements should the telescope ever require it. One of the bonuses of ownership of a refractor is that, compared to standard reflector telescopes, they almost never require re-aligning of the optics (collimation). However, any telescope that is subjected to shock may require optical alignment.
Removing the dew shield, you can access the alignment screws, which you can adjust yourself by referring to the instructions. You can also send it to Explore Scientific’s Service Center for alignment. A standard service charge applies.
The Two Inch Dielectric Diagonal includes a 1.25" eyepiece holder adapter and dust covers to protect the mirror. The purpose of a diagonal is to securely hold your eyepiece and to give you a comfortable viewing angle.
Provided as standard equipment, Explore Scientific's Two Inch Dielectric Diagonal incorporates a light-weight, one-piece diagonal body that securely cradles the precision polished diagonal flat mirror, insuring precision alignment. Ultra-high reflective coatings (99% reflective) composed of multiple thin layers of dielectric material delivers maximum light output.
Both 2" and 1.25" eyepiece holders use compression rings instead of a simple set-screw to more securely hold your valued eyepiece (or imaging device) and to minimize scoring of eyepiece barrels. You can thread standard 48mm filters into the barrel.
Although it cost more, Explore Scientific chose carbon fiber for the telescope tube and dew shield for its high strength-to-weight ratio and its low expansion characteristics when subjected to temperature variations. This helps to keep the instrument light in weight and keeps the instrument focused even if the temperature drops.
Even though this telescope uses a carbon fiber tube making it much lighter, they supply a handle to easily grip the telescope for mounting and placing it back in its case. In addition Explore Scientific slots the handle to accept a standard 1/4x20 bolt to attach a camera.
The Universal Adjustable Mounting Plate of the ED 127 fits on mounts supplied by Explore Scientific, Vixen, and Meade LXD55/75. It also attaches to photo tripods with standard USA or European thread attaching knobs. You can mount the ED 127 to many popular equatorial and Altaz mounts, including Explore Scientific mounts.
Manufacturer Product Number: TED127075-CF
Mount shown is sold separately.
|Telescope Series||Explore Triplet ED|
|Optical Design||Refractor - Apochromatic|
|Mount Type||None - Optical Tube Only|
|Telescope Focal Length||952mm|
|Telescope Focal Ratio||f/7.5|
|Highest Useful Magnification||500x|
|Limiting Stellar Magnitude||13|
|Optical Coatings||Explore EMD|
|Tube Color or Finish||Carbon Fiber|
|Optical Tube Outer Diameter||130mm|
|Length of Optical Tube||39" with dew shield, 33.25" without|
|Optical Tube Weight||14 lbs.|
|Total Telescope Weight||N/A|
|Dew Shield Included?||Yes|
|OTA Mount Type||Dual Rings|
|Diagonal Included?||Yes - 2" Star Diagonal|
|Tripod Type Included||None, Sold Separately|
- Explore Scientific Carbon Fiber ED127 f/7.5 Air-Spaced Triplet Apochromatic Refractor
- 2" Diagonal
- 10:1 Focuser
- Dew Shield
- Cradle Rings
- Carrying Handle
- Vixen-Style Dovetail
- Deluxe Case
the top handle,
a Vixen dovetail on the bottom of the rings,
the 2" diagonal
The measurement of 14lbs that OPT lists was likely done with the diagonal removed (as it is not technically part of the scope) but with the rings, handle and dovetail attached.
The optics are great for imaging with this scope - especially with a good flattener - and the focuser is find for visual use or small, light CCD cameras, but I would highly recommend upgrading the focuser to a Feathertouch model for any sort of serious imaging.
- GREAT SCOPE AND GREAT DEAL Review by texas slim
1= Houston, We Have a Problem & 5= It's Out of This World
Light weight, my Vixen GPD2 handles it easily, no dewing on the objective. The only negatives- too little wriggle room for the internal dimension of the finder, less than optimal quality in the red light rheostat of the finder (I replaced both) and the focusser does not rotate (place your accessories, e.g., Telrads) on the tube with some thought on placement. These are minor and I would, after several years of use, buy this scope again in a heartbeat. (Posted on 4/24/15)
- Very poor quality Review by AlexNaumov
I bought this scope in August 2014 without any discount.
I got following:
- too much dust on both external surfaces of an objective;
- objective is not collimated (I suspect one of lenses decentered) thus I observe spectrum instead of star, at higher magnifications;
- absence of locking screws on lens cell;
- one of screws holding front lens was accidentally unscrewed;
- diagonal mirror was not fixed inside its box;
- improperly assembled dovetail;
- focuser is not on optical axis, and I don't know how to collimate it;
- focuser can move itself when using 82deg ES eyepieces or camera;
- impossible to observe without diagonal (focus cannot be reached).
Finally, I got no warranty because the scope was shipped outside USA. (Posted on 2/10/15)