Beschreibung
- Reduziert die Brennweite und ebnet das gesamte Bildfeld
- Reduzierung der Brennweite um den Faktor 0,79
- Geeignet für Kameras bis hin zum Vollformat Sensor
- Abmessungen FL 58 x 34 / Re 68 x 45,2 Gewicht 111 g / 218 g
- Geeignet für SD81S, SD103S und SD115S
- Gewicht Flattner: 111 g
- Gewicht Reducer: 218 g
- Korrekter Abstand zum Chip: 63,5 mm
■ High peformance flattener and reducer kit
The kit consists of the high-performance flattener lens, reducer lens and connecting rings (Spacer Ring SD81,
EX Tube 66) designed for prime focus astrophotography with the SD81S, SD103S, and SD115S optical tubes,
extraordinary enhancing the flat-field performance, while reducing the focal length by 0.79x.
Hochleistungsflattener und Reduzierkit
Das Kit besteht aus dem Hochleistungs-Flachbildobjektiv, dem Reduzier-Objektiv und den Verbindungsringen (Distanzring SD81, EX Tube 66), die für die Prime Focus Astrofotografie mit den optischen Tuben SD81S, SD103S und SD115S entwickelt wurden und die Leistung des Flachbildes bei gleichzeitiger Reduzierung der Brennweite um das 0,79-fache steigern. Genießen Sie hochwertige Prime Focus Astrofotografie mit den optischen Tuben der SD-Serie, die zwei verschiedene Brennweiten liefern.
Ultra-scharfes Bild über das gesamte Bildfeld der DSLR Vollformat-Sensor
Der SD-Flachbildfilter HD verbessert die Leistung des Flachbildfeldes zum Rand des Sichtfeldes hin, wobei die ursprüngliche Brennweite der optischen Tuben der SD-Serie genau eingehalten wird und das Bildfeld der DSLR-Kamera mit Vollformatsensor bei einem Bildkreis von 44 mm Durchmesser vollständig abgedeckt wird. In Kombination mit dem mitgelieferten Reducer HD wird die Brennweite um das 0,79-fache (f/7.7→6.1) reduziert, wobei der Bildkreisdurchmesser erhalten bleibt. 44mm, wodurch die Schärfe über das gesamte Bildfeld der DSLR-Kamera mit Vollformatsensor deutlich verbessert wird.
Hoher Kontrast AS-Beschichtung
- Reduzierung der Brennweite um den Faktor 0,79
- Geeignet für Vollformat Kameras
- Hoher Kontrast durch AS-Beschichtung
- Ultra-scharfes Bild über das gesamte Bildfeld
- Abstand zum Chip: 63,5 mm
- Geeignet für SD81S, SD103S und SD115S
- SD Flattner HD
- Reducer HD
- Adapterring für SD81
- EX Verlängerungs Hülse 66 mm
- Staubschutzkappen
"SD Flattener HD"
|
Optical Tube |
SD81S / SD103S / SD115S |
|
Focal Length |
625mm / 795mm / 890mm |
|
Magnification |
1,03x / 1,02x / 1,02x |
|
Focal Length |
644mm / 811mm / 908mm |
|
F-Ratio |
7,9 / 7,9 / 7,9 |
|
Image Circle (Dia.) *1 |
44mm / 44mm / 44mm |
|
Peripheral Illumination |
89% / 83% / 80% |
|
Lens Elements |
2 elements in 1 group |
|
Coating |
AS Coating(Over 99,9% light transmission on every single surface) |
|
Dimensions / Weight |
Dia.58x x34mm / 111g |
|
Accessory |
EX Tube 66(Dia.68mm x76mm, 89g), Spacer Ring SD81(Dia.57.5mm x 22.5mm, 18g) |
"SD Flattener HD" + "Reducer HD"
|
Optical Tube |
SD81S / SD103S / SD115S |
|
Focal Length |
625mm / 795mm / 890mm |
|
Magnification |
0,79x / 0,79x / 0,79x |
|
Focal Length |
496mm / 624mm / 699mm |
|
F-Ratio |
6,1 / 6,1 / 6,1 |
|
Image Circle (Dia.) *1 |
44mm / 44mm / 44mm |
|
Peripheral Illumination |
72% / 63% / 60% |
|
Lens Elements |
2 elements in 1 group + 2 elements in 2 groups |
|
Coating |
AS Coating(Over 99,9% light transmission on every single surface) |
|
Dimensions / Weight |
- |
|
Accessory |
EX Tube 66(Dia.68mm x76mm, 89g), Spacer Ring SD81(Dia.57.5mm x 22.5mm, 18g) |
"Reducer HD"
|
Optical Tube |
AX103S / VC200L |
|
Focal Length |
825mm / 1800mm |
|
Magnification |
0,77x / 0,77x |
|
Focal Length |
635mm / 1386mm |
|
F-Ratio |
6,2 / 6,9 |
|
Image Circle (Dia.) *1 |
44mm / 36mm *2 |
|
Peripheral Illumination |
63% / 60% |
|
Lens Elements |
2 elements in 2 groups |
|
Coating |
AS Coating(Over 99,9% light transmission on every single surface) |
|
Dimensions / Weight |
Dia.68mm x 45.2mm, 218g |
|
Accessory |
EX Tube 66(Dia. 68mm x76mm, 89g), Spacer Ring SD81(Dia. 57.5mm x 22.5mm, 18g) |
*1: Over 60% is secured in acceptable image range as well as peripheral illumination. It covers an imaging field of (D)SLR camera of full-format at dia. 44mm and that of APS-C at dia. 28.8mm.
*2: Dia. 44mm for imaging field (47% at peripheral illumination)
Features of the SD Flattener HD
■ Covering the 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 the field of view closely maintaining the original focal length of the SD-series optical tubes, fully covering the imaging field of the DSLR camera with the full-format sensor at an image circle of 44mm diameter.
The photo was taken with the SD Flattener HD
■ Extraordinary High Contrast
The same anti-reflective AS coatings, which are used for our high-end VSD100F3.8 Astrograph, are used to take advantage of 99.9% superb high transmission of light per lens surface. Loss of light, ghost, and flare images are eliminated substantially due to the complete matte finish inside.
■ Compatible with AX103S and VC200L Optical Tubes.
The supplied Reducer HD can be used as a reducer for the AX103S and VC200L optical tubes. The AX103S optical tube incorporates a flattener lens and outperforms high imaging capability even by itself. For this reason, the Reducer HD can be used without using the SD Flattener HD. The AX103S covers an imaging field of a DSLR camera with the full-format sensor with a 44mm image circle.
Originally incorporating a flattener lens inside, the VC200L optical tube offers high imaging capability by itself. For this reason, the Reducer HD can be used without using the SD Flattener HD together.
The VC200L delivers a 36mm image circle (peripheral illumination by 60%) fully covering an imaging field of DSLR camera with an APS-C sensor, and also offers comparably sharp images with the center in spite of 47% peripheral illumination at dia. 44mm image circle.
It covers an imaging field of a DSLR camera with an image circle of dia. 28.8mm with APS-C sensor and dia. 44mm with the full-format sensor.
■ Example image with SD103S+SD Flattener HD: M3 Globular Cluster
Full-format and APS-C is a common name for size representing the size of the light-receiving plane (imaging sensor or film) of a DSLR camera. Full-format (36x24mm), APS-C (23x16mm), and Four Thirds (17.3x13mm) are typically available standards for DSLR cameras. In general, the larger the light-receiving plane, the larger the range can be shot.
■ Example image with SD103S+SD Flattener HD: M31 Andromeda Galaxy
