iOptron Maksutov-Cassegrain, 150mm Maksutov-Cassegrain Instruction Manual

iOptron® 150mm

Maksutov-Cassegrain Optical Tube Assembly

INSTRUCTION MANUAL

WARNING!

NEVER USE A TELESCOPE TO LOOK AT THE SUN! Looking at or near the Sun will cause instant and irreversible

damage to your eye. Children should always have adult supervision while observing

iOptron Corporation | 6F Gill Street | Woburn, MA 01801 | www. iOptron.com

Welcome to a new world of adventure!
The iOptron Rumak-type 150mm
Maksutov-Cassegrain comes with a dual
speed focuser for fine-tuning your images and
an attachable dew shield for better
performance in cold temperatures.

These instructions will help you set up and
properly use and care for your telescope.
Please read them over thoroughly before
getting started.

Getting Started

accepts 2” eyepieces, star diagonals, camera
adapters, etc. There are several accessories
that come with the MAK 150mm OTA. One is
a 1.25” compression ring adapter that slips
into the 2” holder. This lets you use optional

1.25” accessories (eyepiece, star diagonal,
camera adapter, terrestrial image erecting
diagonal, DSI-type camera, etc.) The second
is an adapter for Schmidt-Cassegrain
accessories. This lets you use any SCT
thread-on accessories you might already
have (star diagonals, camera adapters, etc.)
The third item is a standard T-adapter that
also slips into the 2” holder and lets you use a
DSLR for prime focus imaging.

Your telescope comes fully assembled from
the factory. The optics have been installed
and collimated, so you should not have to
make any adjustments to them. Keep the dust
covers on the telescope when it is not in use.

Mounting the Telescope

The iOptron MAK 150mm is a perfect mate for
the iOptron MiniTower™ or MiniTower Pro™

®

goto altazimuth mount, or the SmartStar
goto equatorial mount. It has a Vixen-style
dovetail rail for mounting the scope quickly
and directly onto an altazimuth or equatorial
mount.

-PR

Use of Optional Accessories

Your telescope does not come with eyepieces
and diagonal so as to offer the greatest
flexibility in configuring it to your needs.

The 2” compression ring accessory holder

iOptron Corporation | 6F Gill Street | Woburn, MA 01801 | www. iOptron.com

Selecting an Eyepiece

Always begin viewing with the lowest power
eyepiece. (Note: a 20 mm focal length
eyepiece is lower power than a 10 mm one.)
A formula can be used to determine the power
of each eyepiece: Telescope focal length
divided by eyepiece focal length equals
magnification.

Ex. 1800mm ÷ 20mm = 90X (magnification)

Focusing Telescope

Point the telescope so the front end is aimed
in the general direction of an object you wish
to view. When you first look in the eyepiece,
the image you see may be fuzzy, or out of
focus. If so, gently turn the focus knob with
your fingers until the image becomes sharp.
Go a little bit beyond sharp focus until the
image just starts to blur again. Then reverse