The Vixen SD81SII is checked, measured and, if necessary, adjusted by us before delivery. The focuser is adjusted. 

Examples of our test protocols: Test recordings
How we adjust: About us

 
New Vixen SD81SII high-performance apochromatic refractor with FPL53 SD glass and improved optical properties for demanding observers and astrophotographers

    High performance apochromatic refractor with FPL53 ED glass
    Reduces chromatic aberration to an absolute minimum
    Guarantees extremely high contrast and excellent sharpness
    You will receive a very clear, sharp and neutral image
    Very light and transportable, ideal for mobile use
    Fully coated 81mm SD lenses without spacer plates
    No more unpleasant spikes visible on the stars
    High quality standard “Made in Japan”
    Dimensions: 90 x 585 mm
    Weight: Telescope 2.3 kg and 3.6 kg with accessories



The Vixen SD81SII Telescope OTA is a new 81mm apochromatic refractor with high performance Super ED (=SD) glass. The advantage of this SD refractor is its short length and low weight.

The FPL53 glass built into the telescope reproduces an extremely clear and sharp image thanks to an extremely high level of elimination of residual color errors. The SD glass is designed to bring all the rays - violet, red, blue, yellow and green - together very precisely on the same plane. The special lens material reduces chromatic aberration across all colors.

The new Vixen SD81SII no longer uses spacer plates, which leads to significantly better image quality, especially with bright stars. This means that spikes on the stars that would otherwise have been created by the spacer plates can no longer be seen in photographs. You will also be amazed when you look at the moon or the brighter planets and can observe the lunar craters in razor-sharp detail and with extremely high contrast. Also consider the ringed planet Saturn or the cloud bands on Jupiter. But of course brighter deep sky objects such as the Orion Nebula or the Andromeda Galaxy can also be impressively observed.

In combination with the new optional SD Reducer HD Kit or SD Flattener HD (not included), this refractor telescope enables illumination with a 44 mm image circle for full-frame SLR cameras.

SCOPE OF DELIVERY
 

    Refractor SD81SII telescope
    Pipe clamps
    Dew cap
    Flip mirror folding mirror
    Carrying handle
    Dovetail rail
    Red dot finder

 
Technical data
AREA OF APPLICATION
Area of ​​application	

    Deep sky observation
    Deep sky photography
    Land observation
    Moon observation
    Moon photography
    Planetary observation
    Planetary photography

TARGET AUDIENCE
Target group	

    Advanced
    visual observers
    Specialists and research
    Beginners

PRODUCT FAMILY
Refracting telescope product family
OPTICAL FEATURES
OPTIC FEATURES Apochromatic refractor
Optical design Apochromatic refractor
Maximum recommended magnification 160
ED glass ✓
Material front lens or correction plate Ohara Japan FPL-53 ED glass
Mirror/lens diameter	81mm
Focal length 625mm
Aperture ratio 7.7
Resolution power 1.43 arcseconds
Visual stellar limit size (approx., mag) 11.3
Type of compensation Full multi-shift compensation
Color of the coating is green
Finder scope LED red dot finder