G'day all, I now have the skywatcher ED100 evostar doublet.
The highest useful magnification is X200.
I could achieve this with a single 4.5mm eyepiece or a 9mm eyepiece with a 2x powermate, or an 18mm eyepiece with a 4 times powermate.
Apart from the convenience of having the power mate for other eyepieces, is there a combination that would be better than the rest?
I tend to think that the less glass the better so my logic says the 4mm would be the clearest option, More for observing but maybe some astro photography as well, I have had some success with the 900mm focal length (1350mm) with the 1.5 crop sensor Nikon D7200 photographing the orion nebula
https://flic.kr/p/2hMRmL5
What you recommend.
Peter