I have made extensive measurements on the Meade 12 and 10 inch  telescopes.  I have one of each and my profession involves noise and  vibration control thus I have instruments to make such measurements.    When set up in the equatorial mount configuration and loaded with  assorted accessories both telescopes oscillate in several low frequency  modes with frequencies of 8 to 16 Hz. The exact frequency depends upon  the scope and its exact loading (weight).    The direction of the mode of oscillation in perpendicular to the fork  with the fork pointing to the north and the tube toward the south  horizon.      The important issue is that when tapped, i.e. touched or when a camera  mirror flops, the oscillation lasts 8 to 10 seconds.  Thus I recommend  that photographic exposures of short duration such as for the moon or  planets not be made until the oscillation damps out. About 10 seconds.    If there is interest in this topic, I will send mor information about  this problem.

Related Posts

• Meade Pricing Ponspiracy????
• The Thrill Of The Astronomical Kill Is In The Hunt?
• Advice Im Buying A Telescope
• EXT-90EC Or 125EC For My First Telescope
• Brian Skiff Likes Meade Scopes At TS
• Another "Advice Please" Posting
• Any Thoughts On Orion 6" Reflector Telescope?
• It's Been A While
• First Telescope - $1000?
• "Buy" The Numbers...(ETX Retail Insights)