Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor TelescopeItem#: HN-EXP004
Hoya ED Glass, a Critical Element of Explore Scientific ED Apochromatic Refracting Telescopes
Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed by Hoya Optical of Japan to enable the production of lenses that offer superior sharpness and color correction by minimizing the color dispersion (chromatic aberration, or the "false" color fringing seen around bright objects that happens when light rays pass through standard crown-and-flint doublet objectives). This glass type offers a more durable and long lasting solution to produce an optic to minimize chromatic aberration over delicate fluorite crystal objectives that are prone to fracturing and absorbing moisture.
High Performance Optics Demand a High Precision Focuser
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 we included as standard equipment, on 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. We think you'll agree that such precision is worth 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.
Viewing Comfort and the Preservation of Precious Light
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.
Universal Mounting Plate
The Universal Adjustable Mounting Plate of the ED 102 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 102 to many popular equatorial and Altaz mounts, including a Explore Scientific Mount.
Dimensions & Specifications
Highest Useful Magnification
Explore Scientific Telescope Optical Tubes
- Designed to mount 1 or 2 telescopes at a time
- Works with telescopes that use Vixen-style dovetail brackets
- Heavy duty with adjustable height and dual-mount head
- Counterbalance not needed when mounting one telescope
- Weight capacity of 50 lbs.
- EQ Telescope mount with built in GPS
- Payload of 45 lbs.
- Advanced SmartStar GoTo Technology
- Fits both Vixen and Losmandy type plates
- 2-inch heavy duty stainless steel tripod
- Polar scope with dark-field illumination
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Comments about Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope:
This scope has great optics with no CA. I use it for astrophotography with great results.
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