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Telescopes > Vixen > Advanced Polaris > Vixen Apochromatic refractor AP 81/625 AP-SD81S II
Product no.: 75193

Apochromatic refractor AP 81/625 AP-SD81S II

$ 2,410.00 incl. VAT, plus shipping costs
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Product description

SD81S, SD103S and SD115S, these are the new apochromatic refractors from Vixen with super-ED (= SD) glass!

The redesigned lens enlement with FPL-53 glass reduces colour error (chromatic aberration) to a hardly noticeable degree, and ensures an extremely clear and sharp image. In combination with the new optional SD Reducer HD or SD Flattener HD kits, these refractors illuminate and obtain a 44mm image circle for full-frame DSLR cameras. The interior baffles have been optimised for the M8.

The SD apos from Vixen are ideal for astrophotography. Anyone who has ever looked through a Vixen apo will never want to use another telescope, also for visual observation. The practical flip mirror enables the simultaneous connection of an eyepiece at a comfortable viewing angle and a camera.

Another advantage of Vixen’s SD refractors lies in their relatively short length and low weight.

The Advanced Polaris equatorial mount is ideal for beginners, but also for more experienced observers who are looking for a light travel mount.

The Advanced Polaris not only has a very stylish design, but also some powerful features under the hood, as the illustration on the right shows. An aluminium gearwheel with a 58.4mm diameter and 144 teeth allows fine adjustments to the axes, as well as 9mm diameter worm shafts, each supported by two bearings - that’s precision engineering at its best!

What is special about the Advanced Polaris is the adjustable slipper clutch: without having to unlock anything, you can simply move your telescope in the direction in which you want to point it. The exact centering of the eyepiece is then done using rotary knobs. The slipper clutch works even if your Advanced Polaris is equipped with motors (AP-SM). This allows you to quickly and intuitively navigate the sky.

In order to align the mount to the north, you can use either a polar finder scope, or the compass of the of the Vixen Polarie photo mount. The Advanced Polaris has connectors for both options. The compass has the advantage that you do not need to bend down under the mount, and also don’t need a view of the Polar Star for alignment. The polar finder and compass can be found under “recommended accessories”. In summary: thanks to the extensive accessories available, the mount can be enhanced to suit all your needs.

The APP-TL130 tripod was developed for the Advanced Polaris mount, it it is also compatible with the Porta II, GP and fork mounts from Vixen.

The APP-TL130 tripod guarantees both portability and stability for astronomical observations. Retracted it measures only 60 centimeters and is therefore an ideal companion for people on the go. The tripod can be extended to a maximum height of 130 centimeters. The tips of the tripod legs have a retractable rubber cover, which protects the floor from scratches.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
  • We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

Specifications

Optics


Type
Refractor
Type of build
Apochromat
Aperture (mm)
81
Focal length (mm)
625
Aperture ratio (f/)
7,7
Resolving capacity
1,70
Limit value (mag)
11,3
Light gathering capacity
130
Max. useful magnification
162
lens design
Doublet
Tube weight (kg)
3,6
tube diameter (mm)
90
Tube length (mm)
585
Tube material
Aluminium
Coating
FMC
Stray light baffles in the OTA
yes

Focuser


Type of build
Gear rack
Connection ( to eyepiece)
1.25
Connecting threaded socket (camera-side)
T2
Motorized
no
Ring clamp
yes
Gear reduction
without
Rotating
no

Mount


Type of build
Advanced Polaris
Mounting type
Equatorial
Mounting saddle
Vixen-Style
Motors
no
Load capacity (kg)
6
Weight (kg)
3,6
GoTo control
no

Tripod


Type
Tripod
Accessory plate
no
Max. tripod height (cm)
130
Min. tripod height (cm)
60
Material
Aluminium

Included accessories


1.25'' eyepieces
2 pieces
Finder scope
Red dot finder
Dew Shield
yes
Deviating optics
Flip mirror
Counterweight (piece)
2
Compass
no
Corrector
without
Polar finder scope <p>
no
Carrying handle
yes
Tube clamps
yes

General


Series
Advanced Polaris
Total weight (kg)
13,1

Area of application


Astrophotography
no
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
yes
Advanced
no
Observatories
no

Recommended accessories

Telescope accessories > Transport & storage (8)
Transport cases

Vixen Transport cases Case for Advanced Polaris Mount

$ 113.00*
Telescope accessories > Other (4)
Finder

Omegon Radiant Finder with fastener

$ 49.90*
Eyepieces (4)

Omegon Suitcase with eyepieces and accessories

$ 199.00*
Eyepieces > Other (3)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

$ 89.00*
Filters > Nebulae filters (3)
Filters

Omegon Filters Nebula/ city light filter 1.25 ''

$ 39.90*
Filters > Other (2)
Filters

Omegon Filters Moon filter 1.25"

$ 19.90*
Astrophotography > Camera mounts (4)

Omegon Easypic Universal Smartphone Adapter

$ 129.00*
Astrophotography > Other (1)

Vixen SD Flattner HD Kit

$ 320.00*
Mountings & accessories (4)
Pole finder

Vixen Pole finder QPL polar compass

$ 53.00*
Observatories (1)

Omegon Tent observatory

$ 189.00*
Media (2)

John Wiley & Sons Astronomy For Dummies

$ 24.90*
Outdoor > Lamps (4)
Astronomy torch

Explore Scientific Astronomy torch Astro R-Lite

$ 18.90*
Globes & Maps (1)
Continental map

Oculum Verlag Sky Quality Map Europe

$ 18.90*
Solar Observation (2)

Baader Sun filter foil 20 x 29 cm

$ 30.90*
Maintenance & Cleaning > Lens cleaners (3)

Omegon 7-in-1 lens cleaning set

$ 19.90*
Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

$ 4.90*

*All prices include VAT plus shipping costs.

Vixen Apochromatic refractor AP 81/625 AP-SD81S II
The resistance of the slip clutch is adjustable and so can be adapted to optics of different weights.
Vixen Apochromatic refractor AP 81/625 AP-SD81S II
North alignment with optional compass

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