Vixen SXP2WL-SD115S II Telescope Set

This high-quality apochromatic refractor telescope-set impresses with its 115-mm-SD optics. The telescope is made in Japan and stands out with its excellent craftsmanship, sharpness, and contrast performance. The advantage of this SD refractor lies in its lightweight design and ability to produce color-pure and contrast-rich images. You'll be amazed when you observe the moon’s surface with its craters or Saturn with its ring system. On Jupiter, during a good night, you’ll even see the two bright cloud bands and many smaller details, such as the Great Red Spot on the planet. On moonless nights, you can observe the Andromeda Nebula, Orion Nebula, Eagle Nebula, Lagoon Nebula, and many more fascinating objects. Fainter celestial objects become visible thanks to this 115 mm wide aperture under a good sky.

In combination with the optional SD Reducer HD Kit or SD Flattener HD (not included), this refractor telescope provides an image circle of 44 mm for full-frame DSLR cameras. The older ED81SII, ED103S, and ED115S refractors were originally developed for visual observers and photographers using APS-C cameras. However, the new SD series, with the use of new internal baffles, has been optimized for full-frame cameras. The large 60-mm focuser also allows for the attachment of heavy cameras without tilting. Additionally, the included flip mirror enables comfortable observation even in awkward situations and offers a T2 thread for attaching a DSLR camera. You can observe straight through or at a 90° angle. The carrying handle attached to the tube rings ensures a secure grip when transporting the telescope. The sturdy metal tripod ensures vibration-free mounting of the telescope and mount even in windy conditions.

The SXP2WL mount is easily operated via a WiFi module with a smartphone or tablet. The free STAR BOOK Wireless app provides user-friendly mount control. With this app, you can use convenient celestial navigation functions such as automatic GoTo slewing to specific celestial objects easily through your smartphone or tablet. Since the conventional LCD screen (STAR BOOK TEN) is no longer required, the power consumption of the mount is reduced by up to 20%. This allows for longer periods of astronomical observation and astrophotography.
Select the desired celestial object from a list, and it will be automatically slewed into the telescope’s field of view, and tracking begins. An existing STAR BOOK TEN controller can also be used with this mount without any issues. Equipped with the same precision stepper motors as the top model, the AXD mount, the SXP2WL sets a new standard of performance and precision in the Vixen mount family.
The cross-axis of the SXP2 mount has a photographic payload capacity of 17 kg and weighs only 13.3 kg, making it ideal for mobile observations. Additionally, the motors in the lower part of the mount also act as counterweights, reducing the need for additional weights.

Very Precise Tracking with P-PEC Function
The SXP2 mount comes with the modern STAR BOOK TEN controller. It offers the P-PEC function for particularly precise tracking. "PEC" stands for "Periodic Error Correction". The system corrects mechanical errors caused by periodic gear errors. The P-PEC function available for the SXP2 equatorial mount is an enhancement of the PEC function. The P-PEC function stores your correction data even after the mount has been powered off. This means you do not need to re-enter the data every time, allowing for faster operation and more precise tracking.

Low-Noise Belt Drive System with Minimal Backlash
In conventional motor drive systems for equatorial mounts, gears are driven by the motor. However, this design has the disadvantage of creating some backlash between the gears. To avoid the resulting inaccuracies, the SXP2 mount features a belt drive system. This significantly reduces both gear backlash and drive noise. In addition, the mount responds faster when corrections are needed.

16 Bearings
The mechanical parts of the SXP2 mount contain a total of 16 bearings. The RA axis is equipped with a set of tapered roller bearings to provide more stability for precise tracking.

Stable Altitude Adjustment Block for Alignment
The SXP2 mount uses the same fork as the heavier AXJ mount. This new design allows for quick and stable altitude adjustments.

Easy and Precise Polar Alignment Using Reference Stars
The 6x20 polar finder is pre-installed. This allows for polar alignment in both the Northern and Southern Hemispheres. The polar finder features a variable illuminated reticle with an automatic shut-off function. The brightness can be adjusted in 8 levels to suit your individual needs. Additionally, the polar finder is equipped with a direct alignment system using three reference stars and can achieve accuracy up to 3 arc minutes.

Variable Mounting Head
The mounting head has a diameter of 35 mm and eight threaded holes for M8 screws, arranged 45 degrees apart. An optional accessory plate can be attached directly or in combination with an optional mounting block for dovetail plates. The threaded holes in the mounting head also allow the use of rails from other manufacturers.

Combination of Innovative, Elegant Design and User-Friendly Operation
The stable, rigid mount body with very precise tracking has been further optimized by the P-PEC function. This makes the SXP2 a highly precise and easy-to-use mount, sure to delight any astrophotographer or observer.

Special Motor Positioning for Fewer Counterweights
The heavy RA and DEC motor units are located in the lower part of the declination axis, placing the center of gravity of the cross-axis below the RA and DEC axis. This allows the declination body to act as a counterweight. The flat mounting head also enables the mount to be balanced with significantly fewer counterweights.

Retractable Counterweight Bar
The counterweight bar is made of solid stainless steel and has a diameter of 20 mm. It is compatible with all counterweights from the SX and GP mount series. The counterweight bar is housed in the declination body.

Latitude Adjustment
The latitude can be adjusted between 0 and 70 degrees (divided into 3 zones and adjustable +/- 15 degrees per zone, for high, mid, and low latitudes).

The Vixen Wifi Adapter for EQ mounts allows you to control your Vixen mount via a smartphone or tablet. This enables you to use the STAR BOOK Wireless smartphone app (free) for celestial navigation without cabling. The app quickly turns your mobile device into a controller for the equatorial mount. The mount’s response delay, often considered the biggest drawback of wireless connections, has been reduced to a level comparable to wired solutions.

Reduced Power Consumption Compared to Traditional Controllers with LCD Monitor
The power consumption of the mount is reduced by up to 20%, enabling longer observation sessions compared to traditional wired controllers like the STAR BOOK TEN.

Operation Similar to the STAR BOOK TEN Controller
The STAR BOOK Wireless App is similarly structured to the STAR BOOK TEN controller. Depending on the star chart settings, it contains up to 259,000 celestial objects. Simply tap on an object in the list and start the GoTo. The mount will automatically move to the target and bring it into the telescope’s field of view. All the popular features of the STAR BOOK TEN remain available.

Comfortable Operation
While looking through the telescope, you can operate the mount by swiping on the app’s star chart. Since there are no buttons, you simply glide your finger over the star chart to easily control the mount.

Extensive Astronomical Data Included
This includes data on well-observed celestial bodies such as Messier objects, NGC objects, IC objects, as well as the sun, moon, planets, comets, and dwarf planets.

High-Precision Alignment
By aligning with one or two stars, you can achieve fairly accurate mount positioning. By aligning with three or more stars, a highly precise alignment for high magnifications can be achieved. Objects are then targeted precisely and centered in your telescope’s field of view. Alignment data is saved and can be retained even when the device is powered off. By leaving the telescope in its current state after an observation without moving it, you can start the automatic installation with the same settings during the next observation.

Customizable Settings
Like the STAR BOOK TEN controller, the app offers various individual settings such as gear backlash compensation, red night mode, autoguider, variable GoTo speed, and LED brightness. You can also set the timing of the optical tube flip (meridian flip) as desired. Even if the object moves south during tracking, you can prevent the telescope tube from flipping.

Important Information
Not compatible with older SX mounts using the old blue Star Book.

Technical Information on the Wifi Module
32-bit CISC processor CPU 120 MHz
The unit is connected to the mount via a D-SUB 9PIN connector, as with the STAR BOOK TEN.
It features a 6-pin 6-core modular plug for external autoguider operation.
Supported operating systems are Android 6 or higher, iOS 9.0 or higher, WiFi standard: IEEE 802.11b/g/n.