Quote:
Originally Posted by multiweb
Greg's explanation makes perfect sense. Would be even more dramatic with square filters because you have a straight edge working as a mirror. More info here. |
Hmmm? After 12 images with the new filters and no sign of any reflections at all I thought I had escaped this perceived issue
...next session I'll try again and move the the scope between subs and see if they are a) still there or b) move...?
Looking at the lines again, the verticle one isn't actually perfectly verticle after all but the fact that it terminates right at the shorter horizontal one is rather coincidental...? Maybe there is optical interference at that point and this cancels both light rays out as they intersect as they pass longitudinally through the filter glass
Mike