Giant 3.5" (90mm) that you can use with the Meade telescopes
Magnetic compass, Yes 3.5"(90mm)
diameter, the same diameter as the Meade ETX-90EC telescope. Magnetic
compass can help you to find magnetic north quickly with the very large
scale. Please note magnetic north must be corrected with your locate magnetic
declination for true north. This magnetic compass will help to set
up you telescope early before sky gets dark or where Polaris is obscured
by cloud, building or other objects.