Quote:
Originally Posted by Renato1
Well, in the early hours of the morning, with clear skies and cold weather and Jupiter overhead, using my 2.5mm TMB eyepiece, my little 80mm ED refractor delivered nice enough views of Jupiter and Saturn at 200X.
Which means there is still work to be done to find the actual highest magnification I can push that telescope to.
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"Nice view" doesn't mean resolving more details. You can increase magnification, the view in EP would be bigger, but it doesn't mean that you will resolve more faint details on the surface of the Jupiter. It could be just opposite. Sometimes you lowering the magnification and you see more. Smaller view, but more details.
Wavytone was correct saying - it's also depends on target. I've got 100ED and I found that for Moon I can set anything up to 3D (D is the diameter of aperture in mm's so it's x300) and I'll be fine. Amazing views. But Moon is very bright and contrast.
For Jupiter, I found that magnifications between x130x to just over x180 (so it's between 1.3D and 1.8D) work really well. Going over x180 on most days is useless - no increase in details resolution even with ED refractor.
Saturn on the other hand can tolerate a bit higher resolution - up to 2.2D (x220).
0.5D - 0.7D is best for DSO as it gives nice 2mm - 1.5mm exit pupil for DSO's. To resolve stars in globulars you can go up to 1D.