Explore FirstLight 127mm f/15 Mak-Cassegrain Telescope (OTA only)

A 127mm f/15 Maksutov-Cassegrain telescope that packs 1900mm of focal length into a compact tube weighing just 7.6 pounds.

The Maksutov-Cassegrain design folds the light path with a primary and secondary mirror behind a sealed meniscus corrector lens, delivering a long effective focal length in a fraction of the physical tube length. The result is a compact, go-anywhere telescope that excels at high-magnification planetary and lunar observation. The f/15 focal ratio produces the highest inherent contrast of any FirstLight telescope, ideal for splitting fine detail on Jupiter's cloud bands, Saturn's ring divisions, and lunar crater walls.

The sealed optical tube requires no collimation and stays clean, with no open tube to collect dust or dew. Fully multi-coated optics maximize light transmission. Ships with a 1.25-inch 90° diagonal, 25mm Plossl eyepiece (76x), red-dot finder, and smartphone camera adapter.

Key Features

• 127mm (5") Maksutov-Cassegrain, fully multi-coated
• 1900mm focal length, f/15 — highest contrast in the FirstLight line
• Sealed tube — no collimation needed, stays dust-free
• Compact and lightweight: 7.6 lbs
• 1.25" 90° diagonal, 25mm Plossl, red-dot finder, smartphone adapter included
• Vixen-style dovetail

Ideal For

• Planetary specialists — f/15 delivers the high contrast that Jupiter, Saturn, and Mars demand
• Grab-and-go observers — fits in a small bag, light enough for any portable mount
• Balcony and urban astronomers — the compact tube and high magnification work well in tight spaces where the Moon and planets are the primary targets