Products description
If the center of gravity of a telescope should be further back,
Product Description
If the center of gravity of a telescope needs to be further back, for example, because you're using a heavy camera and filter wheel, you can compensate for the center of gravity with a longer dovetail bar.
With a longer dovetail bar, you can move the telescope so that the telescope and accessories are balanced again.
http://www.teleskop-spezialisten.de/shop/Montierung-Zubehoer/Sonstiges-Zubehoer:::115_20.html