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Skywatcher N 150/750 PDS Explorer BD OTA
As a standalone imaging tube, Skywatcher N 150/750 PDS Explorer BD OTA provides 150mm parabolic optics, 750mm focal length, f/5 performance, APS-C coverage, optional coma correction, dual-speed focusing, Vixen mounting, finder, rings, and adapters.
- 150mm PDS parabolic Newtonian
- 750mm focal length, f/5.0 optics
- 2-inch dual-speed Crayford focuser
- APS-C optimized image coverage
- Mount not included
In Stock
Description
Low-expansion borosilicate optical glass with 94% reflective coatings powers the Skywatcher N 150/750 PDS Explorer BD OTA dual-speed parabolic Newtonian imaging optical tube assembly. Designed with a fast f/5.0 focal ratio, this 150mm (5.91 in) aperture telescope features a 750mm focal length, delivering 0.77 arcseconds Dawes resolving power and reaching magnitude 13.6 for high-performance deep-sky astrophotography.
The Skywatcher N 150/750 PDS Explorer BD OTA incorporates a precision parabolic primary mirror paired with an enlarged 52mm secondary mirror (34.7% obstruction by diameter) to optimize sensor illumination on DSLR and mirrorless cameras. Its 680mm rolled steel tube features a 2-inch dual-speed Crayford focuser with 1:10 micro-reduction and 55mm of extended backfocus travel. Weighing 5.20 kg (11.46 lbs), it mounts onto standard Vixen-style saddles via included tube rings and a 44mm dovetail bar.
Key Features of Skywatcher N 150/750 PDS Explorer BD OTA
Built for high-performance deep-sky astrophotography, prime-focus DSLR imaging, and rich-field visual observation, this 150mm Sky-Watcher Explorer PDS OTA pairs parabolic optics with an oversized secondary mirror. Its 2-inch dual-speed Crayford focuser delivers pinpoint star fields across APS-C sensors.
- 150mm (5.91 in) aperture with 750mm focal length and fast f/5.0 optical speed
- Precision parabolic primary mirror made from low-expansion borosilicate glass
- 94% reflective aluminum optical coatings with protective silicon dioxide overcoat
- Enlarged 52mm secondary mirror obstruction (34.7% diameter, 12.0% area) for full sensor coverage
- 2-inch dual-speed Crayford focuser with 1:10 micro-gear reduction and 1.25-inch adapter
- Extended in-focus travel providing 55mm backfocus clearance for coma correctors
- Vixen-style 44mm dovetail bar with hinged tube mounting rings
- High-aperture 6×30 optical finderscope and 28mm 2-inch LET eyepiece included
Parabolic Borosilicate Optics & Enlarged Secondary Mirror
The 150mm parabolic primary mirror brings all light rays to a sharp focus without spherical aberration, while the enlarged 52mm secondary mirror prevents edge vignetting across imaging sensors. This Sky-Watcher imaging OTA supports visual and photographic magnifications from 21.4x up to 300x.
2-Inch Dual-Speed Crayford Focuser & Extended Backfocus
Precise focus adjustments are crucial when imaging with dedicated cooled cameras or DSLRs. The Explorer 150PDS features a 2-inch dual-speed Crayford focuser with 1:10 micro-reduction for smooth, backlash-free focusing. Its shortened tube assembly provides extended backfocus travel, allowing cameras to reach focus with coma correctors attached.
- 2-inch dual-speed Crayford focuser with 1:10 precision micro-focus reduction
- Shortened optical tube body providing 55mm backfocus clearance for coma correctors
- Heavy-duty tube rings fastened to a standard 44mm Vixen-style dovetail bar
Sky-Watcher Explorer PDS Series Warranty
The Skywatcher N 150/750 PDS Explorer BD OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 150/750 PDS optical tube assembly, hinged tube mounting rings, Vixen dovetail bar, 6×30 optical finderscope, 28mm 2-inch LET eyepiece, and a 1.25-inch adapter.
Sky-Watcher N 150/750 PDS Explorer BD OTA Specs
| Parameter | Specification |
|---|---|
| Brand | Sky-Watcher |
| Full Model Code / SKU / MPN | 10208 (BKP150OTA-PDS) |
| Country of Origin | China |
| Series / Product Line | Explorer PDS Dual-Speed Imaging OTA |
| Optical Design | Newtonian Reflector (Parabolic Primary Mirror, Enlarged Secondary for Imaging) |
| Clear Aperture | 150 mm (5.91 in) |
| Focal Length | 750 mm |
| Focal Ratio | f/5.0 |
| Optical Coatings / Substrate Treatment | Aluminized with Silicon Dioxide (SiO2) Protective Overcoat (94% Reflectivity) |
| Central Obstruction | 34.7% by diameter / 12.0% by area (52 mm secondary mirror minor axis) |
| Glass Substrate / ED Element Spec | Borosilicate Low-Expansion Optical Glass (Parabolic Surface Figure) |
| Corrected Image Circle / Sensor Coverage | 28 mm (APS-C optimized; Full-Frame capable with Coma Corrector) |
| Standard Back Focus / Flange Focal Distance | 55 mm from optional Coma Corrector (Extended In-Focus Travel for Prime Focus DSLR/Mirrorless) |
| Diffraction-Limited Theoretical Resolving Power | 0.77 arcseconds |
| Limiting Visual Stellar Magnitude | 13.6 mag |
| Highest Useful Magnification | 300x |
| Lowest Practical Magnification | 21.4x |
| Focuser Architecture & Reduction Ratio | 2-inch Dual-Speed Crayford Focuser 1:10 with 1.25-inch Adapter |
| Optical Tube Assembly (OTA) Dry Weight | 5.20 kg (11.46 lbs) |
| OTA Physical Dimensions | 680 mm length, 182 mm outer tube diameter |
| Included Mechanical Mounting Interface | Vixen-style 44mm Dovetail Bar with Tube Mounting Rings |
| Mount & Drive Type Included | OTA Only (Mount Not Included) |
| Verified Factory In-Box Inclusions | 150/750 PDS OTA, Tube Mounting Rings, Vixen Dovetail Bar, 6x30 Optical Finderscope, 28mm 2-inch LET Eyepiece, 1.25-inch Adapter |
| Factory Warranty Coverage | 2-Year Limited Warranty |
| Primary Optical Application & Astronomical Target Profile | High-Performance Deep-Sky Astrophotography, Prime-Focus Imaging Tube, Rich-Field Deep-Sky Visual |
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