Astronomical Telescope STEM Lab
Product Code : SCL-OS-12570
Quick Answer: The Astronomical Telescope STEM Lab is a Keplerian refracting telescope set out on an open optical rail, so students can see and change the spacing of the lenses. It uses a 50mm biconvex glass objective and a 25mm biconvex eyepiece on sliding holders.
Last updated: October 2026
Key Features
- 50mm diameter biconvex glass objective lens
- 25mm diameter biconvex glass eyepiece lens
- Optical rail with metric scale marked 0–500mm
- Adjustable sliding lens holders with lock-screws
- Total weight approximately 1.5 kg
Technical Specifications
| Specification | Value |
|---|---|
| Type | Keplerian refracting telescope demonstration kit |
| Objective lens | Biconvex glass, 50mm diameter |
| Eyepiece lens | Biconvex glass, 25mm diameter |
| Rail scale | 0–500mm metric |
| Lens holders | Sliding mounts with lock-screws |
| Weight | Approx. 1.5 kg |
About This Product
Students set the lens holders apart by roughly the sum of the two focal lengths, aim the rail at a distant object or a target card, then slide the eyepiece until the image is sharp. Because nothing is enclosed, the class can see where the objective forms its real, inverted image and how the eyepiece magnifies it, and can check that magnification equals the objective focal length divided by the eyepiece focal length. Enquiries from Estonia, Malta, Malawi, South Africa and Italy for the Astronomical Telescope STEM Lab receive an export quotation.
Frequently Asked Questions
Why is the image in the Astronomical Telescope upside down?
The objective lens forms a real, inverted image inside the telescope, and the eyepiece magnifies that image without turning it the right way up.
How far apart should the lenses be set?
Start with the distance equal to the objective focal length plus the eyepiece focal length, then fine-tune with the eyepiece holder.
Related: Optical Sectional, Mini Telescope STEM Lab and Astronomical And Terrestrial Telescope Combined.
For a quotation on the Astronomical Telescope STEM Lab, contact Educational Instrument.
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