Altair PLANETA 101mm F11 APO Refractor Telescope: Big Visual Performance in a Surprisingly Portable Package The Altair PLANETA 101mm APO is built for the visual astronomer who values contrast, clarity, and uncompromising colour correction. With premium S-FPL53 ED optics and an extended F11 focal ratio, it delivers ultra-sharp, high-power views of the Moon, planets, double stars, and more—with the bonus of being portable and binoviewer-ready.
Key Features for Visual Performance & Portability
Premium Long Focal Length ED Optics
101mm S-FPL53 ED Doublet APO lens with full multi-coatings
F11 focal ratio (1111mm) ensures extreme sharpness and high contrast
Collimatable lens cell with QC serial number, guaranteed factory alignment
No Colour Aberrations—Perfect for Planetary and Lunar Observation
Complete freedom from chromatic aberration, in or out of focus
Long focal ratio reduces eyepiece aberrations for flatter fields
Exceptional contrast and image clarity across the entire field of view
Comfortable, High-Power Viewing
Long depth of field makes focusing easy and forgiving
Works beautifully with high-quality eyepieces—even those with short eye relief
"Ultrawide" eyepieces perform with noticeably less edge distortion
Binoviewer Ready—No Barlow Required
Removable 100mm rear tube section adds extra back-focus
Enables use of binoviewers and some Herschel wedges with ease
No tools needed for disassembly—ideal for travel or solar modding
Modern 2.5" Dual-Speed Focuser
10:1 micro-focus for fine tuning at high magnifications
Smooth, geared movement with tight tolerances and minimal flex
Rear 2" push-fit with compression ring + 1.25" adapter included
Designed for Real-World Use
Lightweight at just 4.8kg including tube rings and dovetail
Retractable 212mm dew shield for compact storage
250mm Vixen-style dovetail and CNC rings for secure mounting
Breaks down into two compact sections (80cm & 20cm) for easy transport
Versatile for Deep Sky & Solar Too
Excellent for double stars and deep sky due to high contrast
Compatible with Herschel wedges, Daystar Quark, and solar modding setups
150mm back-focus (250mm when binoviewer tube removed) offers configuration flexibility
Included Accessories & Build Quality
Finder bracket, metal dust cap, compression rings, and dovetail bar included
Premium mechanical finish with Altair Astro QC and 2-year warranty
The Altair PLANETA 101mm F11 APO isn't just about power—it's about precision, comfort, and visual perfection in a surprisingly portable package. Whether you’re scanning lunar valleys, splitting doubles, or chasing solar detail, this scope delivers pure visual satisfaction.
Choosing a selection results in a full page refresh.
