help ? Skywatcher200p

[O2B3]

I have a skywatcher 200P and on the side of it, it says

D=200mm  F=1200mm

What does this mean ? 

 

 

 

[paul mc c]

First is diamater of mirror and second is focal length. 

[IB20]

D is the diameter of the mirror and FL is the focal length, which I think is simply length of focus point from the surface of the primary mirror.

If you divide the FL of the scope by the FL of an eyepiece you will get the magnification the eyepiece gives you. 
 

 

Edited February 1, 2022 by IB20
Correction

[Louis D]

D=Diameter of the primary mirror, the big one at the bottom of the main tube.

FL=Focal Length: If you were to measure the distance from the primary mirror to the secondary mirror and the distance from the secondary mirror to the top of the focuser, it would be about 1200mm.

[cajen2]

It's handy to remember both figures for future calculations, plus focal lengths for eyepieces.  These allow you to calculate eyepiece magnification, eye relief, etc.

Edited February 2, 2022 by cajen2