Beschreibung
NEU: Extender PH Kit
Extender PH Features
The Japan made high quality extender lens system for astrophotography, applicable to parabolic mirror newton reflector R200SS turning into F5.6 astrograph.
■ The extender PH kit is designed to extend a focal length to 1.4x. The R200SS Newton reflector of 800mm (F4) will be extended to 1,120mm (F5.6).
■ Using optical system of 4-element in 3-group, coma-aberration is extraordinary eliminated to capture sharp images to the edge of imaging field, while complying full-frame camera in 44mm image circle.
■ Use of the 31.7mm eyepiece in combination with eyepiece adapter allows visual observation.
■ 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 substantilly due to the complete matte finish inside.
■ The use of 50.8mm eyepiece adapter with the extender PH kit enables a use like high performance barlow lens for visual observation while eliminating coma aberration over the entire viewing field.
Effective Solution for minimizing "Stray Light"
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Features of External PH Kit (for R200SS)
| Magnification | 1.4x |
| Focal Length | 1120mm(f5,6) from 800mm(f4) |
| Coating | AS-Coating (Max. transmission rate 99,9% per surface) |
| Lens elements | 3-group 4-element |
| Image Circle | 44mm (Format 36x24mm, covering full-frame CCD format) |
| Kit structure | 1 piece of Extender PH, 1 piece of Ex-tube 66 |
| Filter Size | 48mm filter is attachable |
| Applicable Optical Tube | R200SS Newtonian Reflector |
| Visual Observation | Possible (Eyepiece 31.7mm, in common use with eyepiece adapter) |
| Size | Dia. 56mm x L: 128mm |
| Net Weight | 245g |
R200SS (Artikel #2642)
Die sehr schnelle f4 200 mm Optik des R200SS verfügt über einen parabolischen Hauptspiegel und bietet daher extrem scharfe Abbildungen ohne chromatische Aberration. Der Einsatz einer speziellen Beschichtung (state-of-the-art-Technologie) liefert eine optimale Oberfläche für die Beobachtung und Fotografie von Deep-Sky Objekten. Die große Öffnung und die kurze Bauweise machen dieses Gerät optimal für die Astrofotografie von Nebeln, Sternhaufen und Kometen. Die Verwendung eines optionalen Koma-Korrektors ermöglicht eine scharfe Abbildung bis in die Bildecken. Der Okularauszug besitzt eine Aufnahme für 2 Zoll Okulare.
Der R200SS wird mit 232 mm Rohrschellen und Schwalbenschwanz Schiene, sowie mit 7x50 Sucherfernrohr geliefert.
Photos taken with Extender PH with R200SS
Spot Diagram of the Extender PH compared with other Corrector systems
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Connecting Chart
