Vixen Telescope AP-SD81SII・WL

Vixen Telescope AP-SD81SII・WL —
Vixen Telescope AP-SD81SII・WL —

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Suggested retail price: Contact local dealer

JAN
4955295390953

An 81 mm aperture refracting telescope featuring a high-performance SD glass lens and smartphone operation capability.

This compact yet high-performance telescope is designed for discerning amateur astronomers, including an SD81S II optical tube with an SD glass lens and an AP-WL equatorial mount. It comes with a Wireless Unit that allows wireless control of the telescope, enabling a variety of functions such as automatic GoTo slewing and tracking to be easily operated from your smartphone. It is highly recommended for those who wish to enjoy astrophotography using a lightweight equatorial mount.

Vixen Telescope AP-SD81SII・WL Description

  • AP-WL Mount, Suitable for Everyone from Beginners to Experienced Users

    The AP-WL is a lightweight equatorial mount equipped with dual-axis motors, offering an excellent balance of strength and payload capacity. Despite belonging to a compact class, the AP-WL is proud of exceptional stability rarely found in conventional small equatorial mounts, making it suitable for serious astronomical observation. The torque (clamping force) of the friction stop control can be adjusted, allowing beginners to operate the mount intuitively by hand. As soon as a celestial object is centered in the field of view, the mount automatically tracks it using the equipped R.A. motor.

  • Sleek and Modern Appearance

    Featuring a smooth, streamlined design with no protrusions, it dispels the difficult-to-handle image often associated with telescopes. Combined with its lightweight body of just 4.2 kg (counterweight not included), it allows a full-fledged astronomical telescope to be handled with ease.

  • Equipped with a Wireless Unit to control the Telescope via your Smartphone

    The AP-WL mount comes with a Wireless Unit for remote control as standard. By installing the free dedicated smartphone app STAR BOOK Wireless on your device, you can use it as a controller. Tapping a celestial object on the star chart displayed on the screen will allow you to operate functions such as automatic GoTo slewing*.

    *During automatic GoTo slewing, the telescope moves at about 100 times the tracking speed (sidereal rate).

    STAR BOOK Wireless

    App Store Google Play

    Wireless Unit

    Product page
    Notice Regarding Wi-Fi Connection for Wireless Unit Users

  • Intuitive Friction-stop Control

    By adjusting the clamping tightness, you can manually move the telescope toward your target, allowing you to point it at objects intuitively and comfortably. (Note that the friction control and automatic slewing functions cannot be used simultaneously.)

  • Polar Meter for Quick, Rough Polar Alignment

    The mount is compatible with a Polar Meter (sold separately), which provides easy and rough polar alignment. With its altitude scale and magnetic compass, even beginners can quickly turn the AP mount to the celestial pole.

    For more precise polar alignment, an optional polar alignment scope PF-LII, can be used by referencing Polaris. However, the Polar Meter is particularly effective in locations where Polaris is behind obstructions and not visible.

  • Polar Alignment Scope PF-LII for Easy and Accurate Polar Alignment

    The AP mount is compatible with the polar alignment scope PF-LII (sold separately), allowing you to set the mount’s polar axis accurately and easily.

    It offers a method in which three reference stars are aligned with designated positions on the scale inside the polar scope to determine the direction to the polar axis (compatible with both Northern and Southern Hemispheres).

    The polar scope features built-in dark-field illumination, which makes the scale appear red against the night sky. You can adjust the brightness in 8 steps to your preferred level. It also has an automatic shut-off function to prevent battery drain from accidentally leaving the switch on.

    Vixen offers a free "PFL Assist" app for smartphones and tablets, designed for use with the polar alignment scope PF-L II. The app assists with polar alignment by displaying the polar scope’s reticle on your device screen and showing its correct orientation. This allows you to align the reticle pattern of your polar scope with the alignment stars visible through it.

  • Premium Model equipped with a High-performance SD Glass Lens

    This high-performance photo-visual optical tube features an SD (Super ED) glass lens that effectively minimizes chromatic aberration to an exceptionally high level, delivering clear, sharp star images. With a focal ratio of f/7.7 and a well-balanced focal length of 625 mm for its 81 mm effective aperture, it is ideal for a wide range of applications, from planetary observation to deep-sky imaging of nebulae and star clusters.

    It comes equipped with a Flip Mirror Diagonal that lets you change the light path via a simple dial. This is highly convenient, enabling you to instantly switch between two eyepieces of different magnifications or toggle between visual observation and photography when a camera is attached to the straight-through back.

    In addition, it includes a Vixen-standard dovetail attachment plate and a metal carrying handle, making it quick and easy to attach or detach the OTA from the mount and to transport it. This combination delivers excellent performance across a wide variety of celestial observing situations.

  • APP-TL130 Tripod

    The compact APP-TL130 tripod features adjustable telescopic legs from 60 cm to 130 cm long, combining the portability of a camera tripod with the stability of an astronomical telescope tripod. The leg tips can be easily switched between metal spikes and rubber-capped feet by twisting them, reducing the risk of floor damage when used indoors.

  • Tool-free Quick Setup

    No tools are required for assembly or disassembly, allowing quick and effortless setup and takedown at the observation site.

Specifications

Optical Tube Part

  • Objective Lens(Primary Mirror)/Effective Aperture
    81mm SD Apochromat Multi-Coated
  • Focal Length(Focal Ratio F)
    625mm(F7.7)
  • Resolution・Limiting Magnitude
    1.43 arc sec., 11.3 mag.
  • Light Gathering Power
    134x unaided eye
  • Size・Weight
    Length 585mm, outer diameter 90mm, 3.6kg (Main body 2.3kg)
  • Finder Scope
    XY Red Dot Finder Ⅱ (one-power aiming device)

Mount Part

  • Mount Type
    AP-WL Equatorial Mount

Eyepiece Part

  • Focusing System
    Rack and Pinion
  • Threads / Visual Back
    Screw-in / 60mm, 42mm T-ring screwPush-fit: 50.8mm, 31.7mm (with Flip Mirror Diagonal)
  • Eyepiece(31.7mm barrel)
    SLV20mm (31x, 97min. actual field of view)SLV5mm (125x, 24min. actual field of view)

Tripod

  • Material・Form
    Aluminum 3-section telescopic tripod (one-touch type)
  • Size・Weight
    Legs 570⇔1,296mm in length, Height (from ground) 526⇔1,159mm. 598.4mm overall tripod lengthSetting radius 350⇔710mm・3.0kg

Others

  • Main Accessories
    Parts case, Counterweights 1kg x 1, 1.9kg x 1
  • Solar Observation
    *A separate camera adapter is required.Used with a Sun Projection Screen Set B (sold separately) (for short-term observation)
  • Dimensions WxDxH
    1,100x980x1,750mm
  • Weight
    13.8kg (excluding eyepiece)

Set Contents

  • SD81SII OTA
  • AP-WL Mount
  • APP-TL130 Tripod
  • Counterweight 1 kg x 1
  • Counterweight 1.9 kg x 1
  • Parts Case
For availability of products, please contact our local dealers. The specifications are subject to change without notice.

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