Description
Product Overview
The KIMISS 45 Degree Telescope Diagonal is engineered for precision and durability. Constructed from high‑quality optical glass, the prism features a 45‑degree dielectric mirror coating that enhances light transmission, providing vivid, upright images for both astronomical and terrestrial observation. Measuring 4.33 x 3.14 x 2.36 inches and weighing just 3.17 ounces, it fits seamlessly into 1.25‑inch focuser tubes. The all‑positive imaging design eliminates image inversion, delivering a natural, right‑side‑up view without additional accessories. Dust‑proof caps are included to safeguard the optical surfaces during transport and storage.
Usage
Designed for amateur astronomers, backyard stargazers, and nature observers, this diagonal excels in a variety of settings. Whether you are tracking deep‑sky objects on a clear night, scanning the moon’s craters, or observing wildlife during daylight, the prism’s bright, correctly oriented images enhance the experience. Its lightweight form factor makes it ideal for portable telescopes, while the robust construction ensures stability on permanent mounts. 
Why Choose Us
KIMISS combines meticulous craftsmanship with advanced optical engineering. The dielectric coating is applied under controlled conditions to achieve maximum reflectivity and minimal light loss. Each prism undergoes rigorous quality testing, guaranteeing consistent performance across the product line. The inclusion of dust‑proof caps reflects our commitment to protecting your investment, reducing the need for frequent cleaning and preserving image clarity over time.
Key Features
- 45‑degree dielectric mirror coating for superior light transmission
- All‑positive imaging delivers upright, correctly oriented views
- Compact 1.25‑inch design fits most standard telescopes
- Durable optical glass ensures sharp, high‑contrast images
- Dust‑proof caps protect optics during transport and storage
FAQ
Will this diagonal work with my 1.25‑inch focuser?
Yes, the KIMISS diagonal is specifically sized for 1.25‑inch focuser tubes, making it compatible with a wide range of telescopes.
Do I need to adjust focus after installing the diagonal?
Minimal focus shift is typical; a slight refocus may be required to achieve optimal sharpness.
How do the dust‑proof caps attach?
The caps snap securely onto the prism’s ends, providing a tight seal that keeps dust and debris away from the optical surfaces.
Is the image truly upright for both celestial and terrestrial viewing?
Yes, the all‑positive imaging design ensures that the view remains right‑side‑up for both night‑sky and daytime observations.
What is the warranty on this product?
KIMISS offers a one‑year limited warranty covering manufacturing defects and coating issues.





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