Compact Telescope for APS-C Sensors 'SHARPSTAR 50EDPH' | SIGHTRON JAPAN

SIGHTRON JAPAN announces new products from the SHARPSTAR telescope brand: '50EDPH' and 'Reducer for 50EDPH'. Release date is March 19, 2024. The expected retail price for '50EDPH' is around 80,000 yen (including tax). The 'Reducer for 50EDPH' is expected to be around 20,000 yen (including tax).

The '50EDPH' is an apochromatic telescope with a 50mm aperture and a focal length of 275mm. Its 3-element, 3-group design, including two ED lenses, minimizes chromatic aberration for clear observations. By attaching the separately sold 'Reducer for 50EDPH', the focal length is shortened to 230mm, and the aperture ratio is reduced to F4.6, achieving a flat field suitable for APS-C size sensors.

Weighing approximately 1kg, it features a lightweight design. It supports both cameras and eyepieces and comes with two extension tubes.

It can be mounted using M48×0.75mm threading or 31.7mm insertion, and the integrated rack-and-pinion focuser with a reduction mechanism allows for easy composition changes. Additionally, it is equipped with a finder base to accommodate guide scopes or finders.

The dovetail bar integrated with the telescope band has 1/4-20UNC and M6 mounting holes, making it easy to attach to tripods and other equipment.

• Aperture: 50mm
• Focal Length: 275mm
• Aperture Ratio: F5.5
• Optical System: 3 elements, 3 groups
• Total Length: Approximately 196mm (when hood is retracted)
• Weight: Approximately 1kg (including band and plate)
• Expected Market Price: Around 80,000 yen (including tax)

The dedicated 4-element, 4-group correction lens for '50EDPH' reduces the focal length to 230mm at 0.84x and brightens the F-number to 4.6. This correction allows for beautiful images even with short exposure times, with a central spot radius of approximately 3.1μm, ensuring sharpness.

An M48 filter can be attached via an M48 adapter.

• Optical System: 4 elements, 4 groups
• Weight: Approximately 240g
• Back Focus: 55mm (from the rear end of the M48 adapter)
• Camera Mount: M48×0.75mm