iOptron MAK 150mm Telescope OTA

Rumak-Maksutov Optics: 1800mm Focal Length at f/12

This telescope's Rumak-Maksutov design uses a separate secondary mirror, distinct from the central aluminized spot on a standard Maksutov corrector. This provides an additional degree of freedom for optical correction, resulting in a flatter field of view and better-corrected images, especially critical for astrophotography. The native 1800mm focal length and f/12 ratio are engineered for high power, allowing you to achieve the 300X maximum magnification with common eyepieces to study fine details on Jupiter, Saturn, and Mars.

Planetary Detail at 0.77 Arc Second Resolution

With a diffraction-limited resolving power of 0.77 arc seconds, the MAK 150mm has the optical potential to split tight double stars and reveal intricate planetary features under steady skies. This level of resolution makes it possible to discern the Cassini Division in Saturn's rings, resolve individual craterlets on the Moon, and track storm systems in Jupiter's cloud belts. The optical system can detect stars down to a visual limiting magnitude of 12.8, pulling in faint moons around gas giants and the central stars of planetary nebulae.

Imaging-Ready with a Dual-Speed Focuser

Achieving perfect focus at 1800mm is critical, and the included dual-speed focuser provides the fine control necessary for sharp planetary imaging. The coarse focus knob gets you close, while the fine-adjustment knob allows for precise, minute changes without image shift. For convenience and protection, a twist-lock aluminum dew shield is integrated, extending the tube length to 27 1/8 inches to block stray light and delay the formation of dew on the corrector plate.

Adapts to 1.25", 2", and SCT Standards

The MAK 150mm is equipped to handle a wide array of accessories right out of the box. It includes a 2-inch to 1.25-inch compression ring adapter for using standard eyepieces and an adapter ring that allows you to attach accessories designed for Schmidt-Cassegrain telescopes (SCTs). For astrophotography, a T-ring adapter is also included, providing a direct, secure connection for your DSLR or dedicated astronomy camera.

MAK 150mm vs. a 6-inch SCT: Focal Ratio and Field Flatness

When choosing a 150mm-class catadioptric, the main alternative is often a 6-inch Schmidt-Cassegrain. The SCT offers a faster f/10 focal ratio, better suited for a wider range of deep-sky objects. However, the MAK 150mm's advantages lie in planetary and lunar observing.

• Focal Ratio: The MAK's f/12 focal ratio provides higher native magnification for any given eyepiece compared to an f/10 SCT, often yielding sharper, higher-contrast planetary views without needing a Barlow lens.
• Field Flatness: The Rumak optical design in this MAK provides a flatter, better-corrected field than a standard SCT, which suffers from field curvature. This results in sharper stars toward the edge of the frame, a key benefit for imaging.
• Central Obstruction: Maksutov-Cassegrains typically have a smaller central obstruction than SCTs, which translates directly to improved image contrast, making subtle planetary details easier to see.