ES 20mm 100 or Masuyama 26mm 85 decision
Posted 05 April 2020 - 02:37 PM
Going to purchase either one of these, opinions appreciated?
For F7 refractor have ES 17 92 and ES 30 82 looking for something in between.
The 20mm will give mag of 46x while the Masuyama 26 will give mag of 36x with wider field of view.
The ES 17 mag is 54x while the ES 30 is 31x
Fov in Es 20 splits evenly Fov between 17 and 30mm
Also with 20mm will suit remainder of my 2” eyepieces which are similar weight.
Masuyama should give better viiews on axis, offf axis ES likely better.
Not considering anything else, Ethos 21 goog alternative but too expensive.
Posted 05 April 2020 - 02:43 PM
My two cents:
If you have the 30mm ES 82 degree and the 17mm ES 92degree, you don't really have much use for a 20mm. At these exit pupils, your eye determines on-axis sharpness...
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Posted 05 April 2020 - 03:08 PM
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