William Optics Megrez 90 APO - Manual (Page 5)

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In order to operate your Megrez 90 APO you will need the following
minimum equipment:
We recommend mounting using one mounting ring, securing the
L-bracket to the dovetail plate. This will allow maximum stability to your
set-up.
A sturdy tripod for astronomical or birding usage or a mount (equatorial or
ALT-AZ). We recommend WO Eazy -Touch alt-az mount.
A mirror diagonal or erecting prism (The WO 2" Dielectric Diagonal is strongly
recommended for better results in star observation and digital photography. A
top-quality Dielectric Quartz model is also available now).
At least one or two good eyepieces (9 to 40 mm wide-field recommended)
depending on the application.
For astrophotography, a photo adapter plus a T-mount connection are
necessary. A field flattener is strongly recommended for best results.
Please refer to our Accessories Chart on page 03.
Quality nebula filters, light pollution filters, Solar Max H-alpha filters, depending
on the application.
Mounting Suggestions