Askar 120APO Triplet Refractor Telescope User Manual
- June 1, 2024
- Askar
Table of Contents
120 APO
User s Manual
www
.sharpstar-optics.com
WARNING!
DO NOT LOOK AT SUN THROUGH TELESCOPE. IT WILL CAUSE IRREVERSIBLE DAMAGE TO
YOUR EYE.
Instructions for use
The Askar 120APO is an OTA with 120mm aperture, 840mm focal length, and f/7
native focal ratio.
Askar 120APO adopts a triplet air-spaced APO lens design, including one piece
of ED glass.
The entire lens tube of Askar 120APO is crafted using high-quality CNC
machining, with anodized and surface spray paint treatment. All the inner of
the Askar 120APO’s dew shield is covered with matting felt, and inside the
main tube, it is coated with matting paint and equipped with the internal
baffle. The retractable design of the dew shield, along with the enlarged
locking screw, prevents the dew shield from slipping.
There are two finder bases on both sides of the focuser, which not only
eliminates the need for disassembling when changing the position of the finder
scope but also provides additional mounting positions for other astronomical
accessories.
The tube rings of the Askar 120APO have a light weight of only 780g.
The handle has a special slot design, making it able to attach other
accessories that need a finder base. The CNC thumb screws of the tube rings
enable easy opening and locking without other tools. The standard Vixen
dovetail plate, which is compatible with most equatorial or Altitude-azimuth
mounts on the market, has an additional screw hole position design for
adjusting the position of the tube ring and the plate. The length of the plate
reaches up to 290mm, making it more convenient for balancing on the equatorial
mount.
The Askar 120APO adopts a segmented lens tube design. It allows binoculars to
be used for visual observation when the extension tube is disassembled. With
the extension tube, the Askar 120APO can be used with the 0.8x reducer or 1x
flattener, or attaching a diagonal for visual observation.
In terms of the focuser, the Askar 120APO is equipped with a CNC machined
dual-speed R&P large 3.3-inch rigid focuser, which can be compatible with most
motorized focusers on the market. The focuser provides 100mm focusing travel,
is equipped with a high-precision big 360° rotator, and adopts laser-engraved
scales in the length direction and the circumference direction, which is
convenient for adjusting and recording. It is also equipped with an enlarged
rotator locking screw, preventing image shifting during shooting. Inside the
focuser tube, there is an anti-reflective internal design and matting paint,
providing extra measures to eliminate stray light.
The Askar 120APO is an OTA that emphasizes the compatibility of observing
equipment.It can easily achieve focus when connected to 1.25″ or 2″ diagonals
or various eyepieces. Because of the segmented lens tube design, it can also
be attached to a binoviewer for visual observation.
Aperture size:120mm
Focal length:840mm
Focal ratio:f/7
Objective lens: Triplet air-spaced APO(including one ED glass)
Total length:722mm(when the dew shield is contracted)
804mm(when the dew shield is stretched)
Net weight:5.7kg
Gross weight:6.5kg
Rear-end adapter:2″adapter,1.25″adapter
Standard package items: an 120APO OTA, a pair of tube rings, a
handle, an Askar 290mm Vixen dovetail plate, an Oxford cloth case a manual.
The Locking Screw Position Diagram ③ Bottom Locking Screw
② Bottom Load Adjustment Screw
①③④⑤ can be used for electric focusing bracket installation
Items in 120APO Packaging
120APO OTA, a pair of tube rings, a handle, a 290mm Vixen dovetail
plate
A transportation bag
Product Parts and the Size Diagram
Steps of Detaching the Extender Tube
