- Commodity name: AL-140PH APO
- Commodity ID: AL-140PH APO
Sharpstar 140PH, a large-aperture APO astrograph, the very first in Sharpstar APO-series, finally comes to the market. It features pioneering double ED glass and triplet air-spaced lens structure. The focal ratio is properly designed of f/6.5 and its focal length is 910mm.

Most stock triplet APO lenses are regularly equipped solely with an ED glass aiming to reduce the achromatic aberration, whereas two of the 140PH lens set are ED glass, considerably enhancing the aberration control performance, offering a solid foundation for advanced visual observation and astrophotograph.

Sharpstar 140PH is equipped with a retractable dew shield and is wrapped with quality aluminum ally cover. The dedicated 4" large-size focuser allows both coarse and fine adjustment. Sharpstar 140PH also comes with a pair of streamline tube rings, a wide dovetail plate and a ergonomically-crafted handle. All the apparatus and accessories are packed and safely protected in an elegant aluminum chest.

The Sharpstar 140PH can be applied in many full-frame sky-imaging situations with the help of a full-frame flattener and reducer. The 3" 0.73× reducer can effectively lower the original focal ratio to f/4.8, catering to many special astrophographic needs, such as shorter exposure time, larger field of view and advance image quality.

AL-140PH Parameters
Aperture size	140mm
Focal length	910mm
Focal ratio	f/6.5
Objective lens	triplet air-spaced APO(including two ED glass)
Limiting magnitude	11.5
Resolution	0.83 arc-seconds
Total Length of Tube	738.6mm(indented)
Main Tube Outer Diameter	148mm
Net Weight	10.1kg
Gross Weight	11.7kg (Including tube ring, dovetail plate and handle)
Accessories	A Pair of specialized tube ring, a universal dovetail and a handle

NGC 2237 Rosette Nebula | Sharpstar AL-140PH APO

Product introduction

Sharpstar 140PH, a large-aperture APO astrograph, the very first in Sharpstar APO-series, finally comes to the market. It features pioneering double ED glass and triplet air-spaced lens structure. The focal ratio is properly designed of f/6.5 and its focal length is 910mm.

Most stock triplet APO lenses are regularly equipped solely with an ED glass aiming to reduce the achromatic aberration, whereas two of the 140PH lens set are ED glass, considerably enhancing the aberration control performance, offering a solid foundation for advanced visual observation and astrophotograph.

Sharpstar 140PH is equipped with a retractable dew shield and is wrapped with quality aluminum ally cover. The dedicated 4" large-size focuser allows both coarse and fine adjustment. Sharpstar 140PH also comes with a pair of streamline tube rings, a wide dovetail plate and a ergonomically-crafted handle. All the apparatus and accessories are packed and safely protected in an elegant aluminum chest.

The Sharpstar 140PH can be applied in many full-frame sky-imaging situations with the help of a full-frame flattener and reducer. The 3" 0.73× reducer can effectively lower the original focal ratio to f/4.8, catering to many special astrophographic needs, such as shorter exposure time, larger field of view and advance image quality.

Specifications

AL-140PH Parameters
Aperture size	140mm
Focal length	910mm
Focal ratio	f/6.5
Objective lens	triplet air-spaced APO(including two ED glass)
Limiting magnitude	11.5
Resolution	0.83 arc-seconds
Total Length of Tube	738.6mm(indented)
Main Tube Outer Diameter	148mm
Net Weight	10.1kg
Gross Weight	11.7kg (Including tube ring, dovetail plate and handle)
Accessories	A Pair of specialized tube ring, a universal dovetail and a handle

Video

Images

NGC 2237 Rosette Nebula | Sharpstar AL-140PH APO

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