Sharpstar 50mm f/5.5 ED Triplet Apo Refractor Telescope
Availability: Expected end of 2025
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
The Sharpstar 50EDPH is a high-quality, versatile portable small aperture astrograph and visual instrument.
The Sharpstar 50EDPH is an OTA with a 50mm aperture, 275mm focal length, and f/5.5 native focal ratio. The 50EDPH is compact and lightweight, with a gross weight of 2.2lbs or 1.0kg (including the dovetail plate) and a total length of 196mm.
With excellent optical quality, user-friendly mechanical design, and a size that can be grasped in one hand, the 50EDPH is a perfect choice for daily observation and imaging.
The 50EDPH is a triplet air-spaced APO design, including two pieces of ED glass. The triplet design is rare for a telescope of such a small aperture, and the chromatic aberration control is exceptional.
The Sharpstar 50EDPH has a retractable lens hood to further shorten the overall length and increase portability. The 50EDPH has a 70mm Vixen-style dovetail plate, slotted 1/4-20 threaded holes, making it not only adaptable to most equatorial mounts but can also be mounted on a tripod.
Attached to the focuser, the Sharpstar 50EDPH includesis a 360° rotator, which is also equipped with a locking screw. The focuser is a dual-speed rack and pinion with a 10:1 precision fine adjustment knob and an overall travel length of 60mm.
The rear end of the Sharpstar 50EDPH is equipped with a 1.25" adapter, where the user can attach a 1.25" diagonal and eyepiece for visual observation.
The Sharpstar 50EDPH also comes standard with two 50mm M48 extension tubes. The extension tubes can be connected to the eyepiece for visual observation instead of the diagonal, or to a planetary camera for planetary imaging.
The optional 0.84x reducer (sold separately) can bring the Sharpstar 50EDPH's focal ratio down to f/4.6. This is a standard reducer with field flattening capabilities as well. The 50EDPH's reducer supports the APS-C frame size and is equipped with an M48 adapter while also including a built-in M48x0.75 2" filter thread for direct filter mounting.
Sharpstar 50EDPH Specifications:
- Aperture size: 50mm
- Focal length: 275mm
- Focal ratio: F5.5
- Objective lens: Triplet air-spaced APO (including two ED glass)
- Limiting visual magnitude: 10.3
- Tube length: 196mm（Dew shield contracted）
- Dew shield OD: 67mm / 2.63"
- Gross weight: 2.2lbs (including dovetail plate) or 1.0kg
- Rear-end thread type: 1.25" visual adapters
- Vixen-style finder base with thumb screw (33mm max width)
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free Contiguous US Shipping |
| Telescope Focal Length | Up to 300mm |
| Hide Found a better Shipped Price on Frontend? | No |
- 1x 50EDPH OTA
- 1x 2-section 50mm M48 extension tube
- 1x 70mm Vixen-style dovetail plate
- 1x finder base
The Sharpstar 50EDPH is a high-quality, versatile portable small aperture astrograph and visual instrument.
The Sharpstar 50EDPH is an OTA with a 50mm aperture, 275mm focal length, and f/5.5 native focal ratio. The 50EDPH is compact and lightweight, with a gross weight of 2.2lbs or 1.0kg (including the dovetail plate) and a total length of 196mm.
With excellent optical quality, user-friendly mechanical design, and a size that can be grasped in one hand, the 50EDPH is a perfect choice for daily observation and imaging.
The 50EDPH is a triplet air-spaced APO design, including two pieces of ED glass. The triplet design is rare for a telescope of such a small aperture, and the chromatic aberration control is exceptional.
The Sharpstar 50EDPH has a retractable lens hood to further shorten the overall length and increase portability. The 50EDPH has a 70mm Vixen-style dovetail plate, slotted 1/4-20 threaded holes, making it not only adaptable to most equatorial mounts but can also be mounted on a tripod.
Attached to the focuser, the Sharpstar 50EDPH includesis a 360° rotator, which is also equipped with a locking screw. The focuser is a dual-speed rack and pinion with a 10:1 precision fine adjustment knob and an overall travel length of 60mm.
The rear end of the Sharpstar 50EDPH is equipped with a 1.25" adapter, where the user can attach a 1.25" diagonal and eyepiece for visual observation.
The Sharpstar 50EDPH also comes standard with two 50mm M48 extension tubes. The extension tubes can be connected to the eyepiece for visual observation instead of the diagonal, or to a planetary camera for planetary imaging.
The optional 0.84x reducer (sold separately) can bring the Sharpstar 50EDPH's focal ratio down to f/4.6. This is a standard reducer with field flattening capabilities as well. The 50EDPH's reducer supports the APS-C frame size and is equipped with an M48 adapter while also including a built-in M48x0.75 2" filter thread for direct filter mounting.
Sharpstar 50EDPH Specifications:
- Aperture size: 50mm
- Focal length: 275mm
- Focal ratio: F5.5
- Objective lens: Triplet air-spaced APO (including two ED glass)
- Limiting visual magnitude: 10.3
- Tube length: 196mm（Dew shield contracted）
- Dew shield OD: 67mm / 2.63"
- Gross weight: 2.2lbs (including dovetail plate) or 1.0kg
- Rear-end thread type: 1.25" visual adapters
- Vixen-style finder base with thumb screw (33mm max width)
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free Contiguous US Shipping |
| Telescope Focal Length | Up to 300mm |
| Hide Found a better Shipped Price on Frontend? | No |
- 1x 50EDPH OTA
- 1x 2-section 50mm M48 extension tube
- 1x 70mm Vixen-style dovetail plate
- 1x finder base