Vixen SD81S Apochromatic Optical Tube Unit
Product.Nr.:
VE#26146
EAN: 4955295261468
products condition: new
Manufacturer: Vixen
1.349,00 EUR
incl. 19 % VAT
-
Gewöhnlich versandfertig in 24 Stunden
- delivery time : 1-2 Tage
- weight 4,7 kg
- 81/625mm SD-Apochromat (f/7.7)
- Made in Japan
Vixen's standard "photo-visual" SD apochromatic refractor with the focal length of 625mm.
Vixen SD apochromatic refractors feature "Super extra-low Dispersion" optical glass in its objective lens. With the use of a optional Vixen SD reducer HD kit or optional Vixen SD Flattener HD kit, the image circle of 44 mm in diameter is obtained to be used for photography with DSLR cameras with full-frame imaging sensor.
The SD lens suppresses residual chromatic aberration far below the threshold of visibility.
A lens of refracting telescopes has chromatic aberration which is caused by different wavelength 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 g-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 Vixen SD81S delivers outstanding sharp images with high contrast for both visual and photographic applications. Brighter F7.7 images will satisfy the most demanding visual astronomer or astrophotographer.
Optical tube of a moderate length for visual observation and astrophotography.
The optical tubes of the SD81S, SD103S and SD115S are designed to be shorten to its length. It is convenient to carry and setting up and balancing the optical tube easier.
Quick change of viewing orientation with flip mirror.
The provided flip mirror allows you to change light pass for comfortable observing posture. With two eyepieces of different focal length attached to the flip mirror, you can switch magnifications quickly.
Versatile accessories for visual observation and astrophotography.
The focuser drawtube has 60mm threads in diameter for attaching a variety of optional eyepieces and accessories for visual and photographic purpose.
Optional accessories to expand your pleasure of astrophotography.
This kit consists 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.
| Objective lens | 81mm SD apohromatic |
| Focal length (Focal Ratio) | 625mm (f/7.7) |
| Type | SD-Apochromatic |
| Coating | multicoated |
| Light gathering power | 134x unaided eye |
| Resolving power | 1.43" |
| Limiting magnitude | 11.3mag |
| Finder scope | XY Red dot finder II (1xaiming device) |
| Eyepieces | Optional |
| Focusing mechanism | Rack-and-pinion, with lock knob |
| Adapter thread/visual Back |
|
| Accessories | Tube rings, Dovetail tube plate, Metal carry handle |
| Photography | Usable with Prime focus, Eyepiece projection and Afocal imaging |
| Solar observation | Available with Vixen Sun projection screen set B |
| Tube size | 90mm |
| Tube length | 585mm |
| Tube weight | 3.6kg (Net 2.3kg) |
Scope of Delivery
- Vixen SD81S II Apochromatic Optical Tube Unit
- Vixen XY Red Dot Finder II
- Vixen Flip mirror diagonal (WITHOUT eyepieces)
- Vixen Tube Rings
- Vixen Dovetail Tube Plate
- Vixen Carry Handle
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Manufacturer identification
Manufacturer identification
Name: Vixen Co., Ltd.Streetaddress: 5-17-3 Higashi-Tokorozawa Tokorozawa-shi
ZIP Code: 359-0021
City: Saitama
Country: JP
Phone: 04-2944-4000
