Siebert Optics 1,5x Telecentric Ultra Barlow

Χρήση barlow σε deepsky αστροφωτογράφιση???

	Scope	GSO 200/800mm Newton

Camera	Canon 40Da
Mount	Losmandy G11
Guiding	80/900mm Refractor with ALccd5 and Guidemaster
Exposure	100min (10 x 10min)
Date	16. Juli 2009
Location	Waldbüttelbrunn / Würzburg (Germany)