Quote:
Originally Posted by bojan
... BTW, this method of polar alignment is exactly equivalent to the use of polar scope....
However, to achieve the maximum accuracy, the DEC difference between the two stars (01'40" or ~1/20 of Moon diameter) should also be considered and eventually corrected.
|
This way of thinking could be extended a bit further, by designing a special reticle with double cross-hairs in the eyepiece, positioned such that the difference in DEC for specific stellar pair (and specific telescope FL) is accounted for.
In this case, the pair does not have to be exactly at the same DEC, as long as it could fit in the same FOV.