The SharpStar AL107 apo refractor has: 

• 107mm f/6.5 fully multicoated air-spaced triplet apochromatic optics using an FPL-53 ED element and all Ohara glass

• collimatable lens cell

• rotating dual-speed 3" Rack and Pinion focuser with 10:1 ratio fine focusing 

• both 2" and 1.25" brass compression ring eyepiece holders 

• retractable lens shade/dew shield 

• long-lasting white paint finish with anodized grey trim 

• aluminum-frame foam-fitted hard case 

• two-year warranty 

The performance of this 107mm FPL-53 ED (Extra-low Dispersion glass) triplet apochromatic refractor is outstanding and it`s a big value for the price. 

All of the lenses in the air-spaced triplet optics of the AL107 are fabricated from Ohara glass (Ohara is Japan’s premier manufacturer of specialized optical glass), including the first-quality FPL-53 center element. The result of using the best possible glass is the finest possible control of spurious color. The AL107 images are totally free from secondary spectrum – despite the scope fast focal ratio, and even at high magnifications, even on the white and bright objects. 

The collimable lens cell is finely-machined and the dual speed 3" R&P focuser features a microfine 10:1 fine-focusing ratio and can rotate a full 360° to put your camera or eyepiece in the most comfortable observing position. The supplied 2" and 1.25" accessory holders use brass compression rings that won’t scratch your eyepiece barrels. The 2" accessory holder can itself rotate 360°, independent of the focuser, so you can make a final tweak of the photographic composition or diagonal viewing angle without having to adjust the focuser itself a second time. The Sharpstar AL107 has a retractable lens shade and comes in a locking aluminum-frame carrying case. 

 

Other specifications: 

Fully multicoated optics: the triplet objective lens has the latest state-of-the-art antireflection multicoatings on all air-to-glass surfaces for high light transmission and excellent contrast. 

The edges of the lenses are blackened to reduce internal reflections and further improve image contrast. 

Internal light baffles: Contrast-enhancing knife-edge light baffles in the lens shade and within the optical tube provide truly dark sky backgrounds and high terrestrial contrast. 

Dew shield: A self-storing retractable dew shield slows the formation of dew on the lens in cold weather to extend your undisturbed observing time. 

The 100mm (4") travel 3" diameter focuser drawtube has a scale marked in 1mm increments so you can note individual focuser positions for easy return to the correct focus when switching between visual use and photography. The focuser has adjustable tension to accommodate varying equipment loads. A separate lock knob under the focuser lets you lock in your photographic focus. 

2" and 1.25" compression rings accessory/eyepiece holder

Camera angle adjuster: In addition to the entire focuser rotating, the focuser drawtube’s 2" eyepiece/accessory holder is itself a built-in camera angle adjuster that lets you quickly make final small adjustment tweaks to the angle of your camera or star diagonal without having to disturb the heavier focuser proper. This camera angle adjuster is standard equipment.

Tube finish: The optical tube and lens shade are finished in a durable high gloss automotive-style white paint.

The focuser and trim are anodized gun metal grey. 

Tube rings: a couple of 114mm I.D. hinged tube rings come with the scope.

Other supplied accessories: A slip-on metal dust cap is standard. 

There is no finderscope provided, but a threaded hole on the upper left side of the optical tube permits the installation of several optional finders. The finder mounting hole is sealed with a slotted-head threaded insert to prevent the entrance of dust into the scope when no finder is installed. 

Shipping/storage case: The scope comes in a foam-fitted aluminum-frame locking hard case with carry handle (black). 

Technical Specs

Clear Aperture: 107 mm

Focal Lenght 700 mm

Focal Ratio: f/6.5

Resolving Power 1.07"

Limiting Magnitude: 12.6

Max practical magnification: 215x

Weight: 6 Kg