Vixen SD apochromatic refractors feature "Super extra-low Dispersion" optical glass in its objective lens.
With the use of an SD reducer HD kit or SD Flattener HD kit, the image circle of 44 mm in diameter is obtained to be used for photography with DSLR cameras with a full-frame imaging sensor.
A lens of refracting telescopes has chromatic aberration which is caused by different wavelengths of visible light (colors) focusing at different distances. The Vixen SD lenses, made of FPL53 super extra-low dispersion glass, allow for correcting the chromatic aberration over a wide spectrum of light.
The SD lenses focus visible rays of light from the Cray(red), d-ray(yellow), e-ray(green), F-ray(blue) to X-ray(violet) at nearly the very same position. As shown in the diagrams of spherical aberration, it verifies that the chromatic aberration is highly corrected over a wide spectrum of light with the SD lenses. Especially the g-ray, which affects image contrast, is suppressed excellently. The SD81S delivers outstandingly sharp images with high contrast for both visual and photographic applications. Brighter F7.7 images will satisfy the most demanding visual astronomer or astrophotographer.
The optical tubes of the SD81S, SD103S, and SD115S are designed to be shortened to their length. It is convenient to carry and set up and balance the optical tube easier.
The provided flip mirror allows you to change light passes for comfortable observing posture. With two eyepieces of different focal lengths attached to the flip mirror, you can switch magnifications quickly.
The focuser drawtube has 60mm threads in diameter for attaching a variety of optional eyepieces and accessories for visual and photographic purposes.
This kit consists of components for prime focus astrophotography with the SD81S, SD103S, or SD115S optical tube. This reducer is made to be used in combination with an accessory such as a wide photo adapter 60DX, sold separately.
The modular AP mount system was specially developed for travel astronomy and can be completely dismantled or expanded with modular add-ons
The simple force of friction keeps the telescope in place.
Easily direct the telescope to your desired celestial object without loosening a screw.
The friction automatically holds the telescope in position.
The AP mount provides secure, stable support for your telescope.
Thanks to the slip clutch mechanism, the mount can be quickly adjusted to the target object.
There is a wide range of optional accessories.
|GENERAL TECHNICAL DATA|
|DIMENSIONS & WEIGHTS|
|Total length||178 mm|
|Total width||258 mm|
|Total height||104 mm|
|Net weight (without access.)||8000 g|
|Load capacity||8 kg|