Re: Expected tracking times *Unguided #EXOS2 #TECHNICAL

Wes Mcdonald


It's the focal length ratio.  The 30mm guider has a focal length of what, 150mm?100?.  Your 400 mm lens has a FL of 400.  Ratio about 3.5 to 4.


Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired

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