Thank you Manny and Ychocky.
No, not 500mm. To be honest it is 3600mm and sometimes 8600mm (but the air has to be really clear and steady)
![Cool](images/smilies/cool.gif)
The Skywatcher MAK150 which I use has a focal length of 1800mm and Panasonic GH2 has a crop factor of obout 2.
Focus is controlled by a servo as I cannot touch directly the tripod head handle (in my case it is Vinten Vision Blue) - I use an old trick with a rubber band to control the telescope movement as well to avoid vibrations from fingers and hand.
All the stuff should be carefully counterweighted - I am using now two 12V gel sealed batteries as the counterweights and electric power for external 7" monitor and motorfocus.
If you have any questions I will try two satisfy your curiosity.
One drawback of that equipment is that you cannot hide it into your pocket or even into a single bag
![Biggrin](images/smilies/biggrin.png)
.
Cheers, Marek
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