From telescopes to stock market,
We should consider open one "Investment Board" in AstroCafe
社長 寫:
780/4mm Mono = 190x,加上1.8x ED Barlow便是342x,看行星月面有點略高,土星或月面高對比度目標是可以的,但木星則不成了,所以稍後最好配個5mm,我會留意一下二手市場有沒有。
I did use 6mm and 4mm with 1.8x ED Barlow for jupiter
the image on 6mm with 1.8x ED Barlow looked better than that of 4mm
i don't have 5mm to compare with, but ~280x, almost 300x, sounds approaching to the limit of the 780/130 scope's performance on jupiter
i saw one 5mm TMB supermono eyepiece for sale on a forum, but it was gone within an hour after the post was up ... unlucky ...