|Télescopes astronomiques / Telescopes for astronomy | Réfracteurs / Refractors |
127MM ED F/7.5 TRIPLET APO FIBER CARBON (TUBE OPTIQUE / OTA)
The designers of the Air Spaced Triplet ED Carbon Fiber 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 10:1 two-speed focuser, a 2" 99% reflective dielectric diagonal, an 8x50 erect-image, illuminated-reticle viewfinder, and a deluxe case. You can be confident that the quality and construction of these telescopes will allow heavy use for many years and are backed with a transferrable Five Year Limited Warranty.
EMD™ (Enhanced Multilayer Deposition) Coatings eliminates light scatter and maintains image contrast.
Contrast is further enhanced with multiple baffles that mask and deflect unwanted stray light.
With all Explore Scientific ED Apos, a ten-to-one, two-speed Crayford-style precision focuser with tension adjustment and lock to obtain and hold perfect focus is included as standard equipment.
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.
Many premium small refractors don't include some basic accessories like a viewfinder. This is often done to keep prices down. Those manufacturers rationalize that its owner simply will not need a viewfinder... wrong!
While it's true that ED Apos in this aperture usually have short focal lengths, it still is a challenge to successfully aim the telescope without a viewfinder. So Explore Scientific decided to offer a superior class 8x50 illuminated viewfinder as standard equipment.
The Explore Scientific 8x50 produces a wide 6° field of view and allows precision focus of both main objective and eyepiece illuminated reticle. A precision polished roof prism produces images that are right-side-up, left-to-right correct. In other words, things are not upside-down and backwards like most viewfinders. Our illuminated reticle is truly designed for finding objects with its open center (so you don't mask the object you are centering with cross hairs) and scale markings for 1.5°, 3°, and 4.5° (the edge of the field of view is the 6° boundary).
Carbon Fiber Tube and Cradle Rings with Handle!
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, we supply a handle to easily grip the telescope for mounting and placing it back in its case. In addition we slot the handle to accept a standard 1/4x20 bolt to attach a camera.
The 55° apparent field, long eye-relief eyepiece produces a bright 15.5mm exit pupil and will allow you to find faint galaxies, comets, and nebulae. All optics are fully-multicoated to insure maximum contrast.
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.
Optical Design: Air-Spaced Triplet ED Apochromatic Refractor with HOYA® Dense Fluor Crown, FCD1 ED Glass
OTA : Carbon Fiber Optical Tube
Clear Aperture: 127mm
Focal Length: 952mm
Focal Ratio: f/7.5
Resolving Power: .9 arc seconds
Coatings: EMD™ (Enhanced Multilayer Deposition) Coatings
Limiting Stellar Magnitude: 13
Maximum Practical Visual Power: 500x
Lowest Useful Visual Power: 14.5x
Focuser: Ten-to-One Dual-Speed Crayford-Style, w/ Adjustable Tension and Lock
Viewfinder: 8x50 Straight; Correct Image; Illuminated Reticle; Adjustable Objective and Eyepiece Focus; Dual-Ring, Six-Point, Bracket w/Quick Release Shoe
Cradle/Saddle Plate: Dual Ring Style - Fits Explore Scientific Mounts; Vixen Mounts; Meade LXD55/75 Mounts
Tube Diameter: 130mm
Tube Length: 41.75 in.; 1060mm (incl. dew shield)
33.25 in; 844mm (without dew shield)
Tube Construction: Aluminum; Stainless Steel
Optical Tube Assembly Weight (with all standard accessories): 18 lbs; 8.16 kgs.
(Mount is not included)