SD Optical Tube Assembly

<Features>

A new apochromatic refractor with high-performance Super ED Glass (=SD) made of leading-edge FPL53 glass reproduces extremely clear and sharp image by extraordinary eliminating color aberration.

The SD glass is designed to gather all g-ray (purple), C-ray (red), F-ray (blue), d-ray (yellow), and e- ray (green) around 0 value, which stands for an excellent lens material surprisingly reducing chromatic aberration over all colors. Using in combination with new optional SD Reducer HD Kit or SD Flattener HD Kit , it allows 44mm image circle with full-format (D)SLR camera.


Concept of SD81S, SD103S and SD115S is to design optical teleskope with short length for better portability and easier setting with less counter-weight.


ED81SII, ED103S, ED115S were originally designed for both visual observation and photo visual users. SD Optical Tube Series optimized its position of "baffle" inside of draw tube in order to be compatible with full-size DSLR.


SD81S Optical Tube Assembly (Art.#26146)

Spezifikationen SD81S SD Apochromatic
Objektiv Linsen D=81mm, Multi-coated
Brennweite 625 mm (f7,7)
Auflösung und Grenzgröße 1,43 Bogensekunden; 11,3
Lichtsammelvermögen 134x
Abmessungen und Gewicht 90mm dia x 585mm, 3,6kg
Sucherfernrohr XY Red Dot Finder II
Adapter und Anschlüsse Adapter thread 60mm and 31,7mm for T-Ring, Visual back 50,8mm and 31,7mm push fit with the supplied Flip-Mirror Diagonal.
Mitgeliefertes Zubehör Tube Rings, Flip-Mirror Diagonal, Metal Carry Handle, Slide Bar M,
Fotografie Primärfokus und Okular Projektion

SD103S Optical Tube Assembly (Art.#26147)

Spezifikationen SD103S SD Apochromatic
Objektiv Linsen D=103mm, Multi-coated
Brennweite 795 mm (f7,7)
Auflösung und Grenzgröße 1,13 Bogensekunden; 11,8
Lichtsammelvermögen 217x
Abmessungen und Gewicht 115mm dia x 810mm, 5,4kg
Sucherfernrohr 7x50 Illuminated Reticle, 7 Degree FOV
Adapter und Anschlüsse Adapter thread 60mm and 31,7mm for T-Ring, Visual back 50,8mm and 31,7mm push fit with the supplied Flip-Mirror Diagonal.
Mitgeliefertes Zubehör Tube Rings, Flip-Mirror Diagonal, Metal Carry Handle, Dovetail Tube Plate,
Fotografie Primärfokus und Okular Projektion

SD115S Optical Tube Assembly (Art.#26148)

Spezifikationen SD115S SD Apochromatic
Objektiv Linsen D=115mm, Multi-coated
Brennweite 890 mm (f7,7)
Auflösung und Grenzgröße 1,01 Bogensekunden; 12,1
Lichtsammelvermögen 270x
Abmessungen und Gewicht 125mm dia x 930mm, 6,2kg
Sucherfernrohr 7x50 Illuminated Reticle, 7 Degree FOV
Adapter und Anschlüsse Adapter thread 60mm and 31,7mm for T-Ring, Visual back 50,8mm and 31,7mm push fit with the supplied Flip-Mirror Diagonal.
Mitgeliefertes Zubehör Tube Rings, Flip-Mirror Diagonal, Metal Carry Handle, Dovetail Tube Plate,
Fotografie Primärfokus und Okular Projektion

<Optional Accessories>

■ Covering entire imaging-field of DSLR with full-format
The kit consists of the high performance flattener lens and connecting rings (Spacer Ring SD81, EX Tube 66) designed for the SD81S, SD103S and SD115S optical tubes.

■ Ultra sharp image over entire imaging field on DSLR full-format sensor
The SD flattener HD improves the flat-field performance toward the edge of field of view closely maintaining the original focal length of the SD-series optical tubes, fully covering the imaging field of DSLR camera with full-format sensor at image circle of 44mm diameter.

■ High Peformance Reducer for AX103S and VC200L Optical Tubes
The reducer HD is compatible with the AX103S and VC200L optical tubes, reducing the focal length
by 0.77x.

■ Compatible with AX103S and VC200L Optical Tubes
The AX103S Optical tube incorporates a flattener lens and outperforms high imaging capability even by itself. From this reason, the Reducer HD can be used wihtout using the SD Flattener HD. The AX103S covers an imaging field of DSLR camera with full-format sensor with 44mm image circle.


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