iOptron OTA Maksutov-Cassegrain 90mm (MC90) 8740 - STEM Telescopes

iOptron OTA Maksutov-Cassegrain 90mm (MC90) 8740

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The iOptron® 90mm Maksutov-Cassegrain telescope (MC90) is a great astronomy telescope that is a powerful yet small enough to take anywhere. Multi-coatings applied to the curved front lens guarantee the highest possible light transmission. Maksutov-Cassegrain Telescope dramatically reduces the chromatic aberration that plagues its refractor counterparts. With a focal length of 1200mm, the MC90 exhibits all the performance of classic long-tube 90mm refractors, with a compact tube. This light weight, ultra-compact scope offers a great combination of power and transportability, and brings stargazing to a whole other level.

The MC90 also equips with an internal flip mirror for dual viewing. As easy as flipping a switch, the MC90 enables the astrophotographer to find, center, and focus a target object visually with a 1.25" telescope eyepiece, then photograph it with a camera. All without swapping out any equipment.

The MC90 comes with 2 optical eyepieces (9mm and 25mm) and a 45º erect prism diagonal. The equipped dovetail makes it fit to any telescope mount that accepts Vixen-style dovetail.

The combination of iOptron’s MC90 and CubeTM or Cube ProTM goto telescope mount is the ideal choice for sky surfing and astrophotography.


90mm Maksutov-Cassegrain telescope

Focal length 1200mm

Two Optical Eyepieces (10mm and 25mm)

45 degree Erect Prism Diagonal

Internal flip mirror for dual viewing

Dust cap

Vixen dovetail plate

One year limited warranty

Small dovetail saddle for finder scope mounting

Optical Design




Focal Length




Resolution Power

1.29 arc sec

Limited Magnitude


Highest Useful Magnification




Eyepiece Adapter


Eye Pieces

25mm (48X) and 10mm (120X)


45º Erect Prism


1 year limited