Astronomical And Terrestrial Telescope Combined
Product Code : SCL-OS-11834
Quick Answer: The Astronomical And Terrestrial Telescope Combined is a refractor with an achromatic objective that switches between inverted astronomical viewing and upright terrestrial viewing with a removable erecting eyepiece. It has a 40 mm to 50 mm objective and a 450 mm to 600 mm focal length, depending on model.
Last updated: October 2026
Key Features
- Refractor with achromatic objective lens in crown and flint glass
- Brass or aluminium body
- Objective diameter 40 mm to 50 mm
- Focal length 450 mm to 600 mm, model dependent
- Alt-azimuth mount with locking knobs
- Removable terrestrial erecting eyepiece, 1.5x/2x
Technical Specifications
| Specification | Value |
|---|---|
| Optical system | Refractor, achromatic objective |
| Optics | Crown/flint glass |
| Body | Brass or aluminium |
| Objective diameter | 40 mm to 50 mm |
| Focal length | 450 mm to 600 mm (model dependent) |
| Mount | Alt-azimuth with locking knobs |
| Erecting system | Removable terrestrial eyepiece, 1.5x/2x |
| HS Code | 9005.80 |
About This Product
With the plain eyepiece the telescope gives an inverted image suited to the Moon and planets, and with the erecting eyepiece fitted it gives an upright view of distant landscapes. In the classroom it is used to explain how objective and eyepiece lenses form an image, how magnification depends on focal lengths and why an erecting lens is needed for terrestrial use.
Frequently Asked Questions
How does the Astronomical And Terrestrial Telescope Combined switch between the two modes?
A removable terrestrial erecting eyepiece turns the inverted astronomical image upright for land viewing.
Related: Optical Sectional, Astronomical Telescope STEM Lab, Simple Telescope and Lenses, Cylinderical, Plano and Double - Convex and Concave.
For a quotation on the Astronomical And Terrestrial Telescope Combined, contact Educational Instrument.
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