The iOptron is a bit more than I need as I won't be changing Telescopes after this purchase,
I'm also looking at the Meade 8" LX90 ACF with an
Any experience with Meade LX90?
A key point indeed. I wonder when I see the resolution specs of various telescopes as the atmosphere 'noise' and seeing conditions often make them unachievable.
Flyhigh,Bigzmey wrote: ↑Sun Feb 04, 2024 3:00 am Don't warry, 8" will be all around better. It is just matter of paring it with right EPs. With good quality diagonal and EP you will be able to resolve extra levels of details. Not just the red spot but fine details within the red spot. Of cause giving that your seeing is good.
What Joe says! And to take it one step farther, under the same magnification 8" scope will show brighter image compared to 6" scope no matter how fast or slow those scopes are.OzEclipse wrote: ↑Sun Feb 04, 2024 3:21 amFlyhigh,Bigzmey wrote: ↑Sun Feb 04, 2024 3:00 am Don't warry, 8" will be all around better. It is just matter of paring it with right EPs. With good quality diagonal and EP you will be able to resolve extra levels of details. Not just the red spot but fine details within the red spot. Of cause giving that your seeing is good.
Apparent brightness is not a function of f ratio. Area of the primary and magnification are the only two things.
If you compare an 8" f10 scope with a 40mm eyepiece and an 8" f5 scope with a 20mm eyepiece:-
Both scopes will have a magnification of 50x,
Both scopes will have a 4mm exit pupil
Provided both eyepieces have the same apparent field of view, then the true field of view will be the same.
If both scopes the same light transmission, the area of the formed image on your retina is the same consequently, both will show the object with the same surface brightness.
Joe
I couldn't agree more. It doesn't matter how few nights have seeing that let you achieve maximum resolution, you will remember those nights. Ok, so I'm a bit of a freak for remembering dates, but I clearly recall two nights in Mid April and Mid May of 1984 (Mars, Jupiter,, & Saturn) and Monday October 13, 2020 (Mars) when I had incredibly stable seeing and enjoyed the finest views of Mars that I have ever enjoyed. On that night in 2020, I could resolve Valles Marinaris, in parts it is less than 0.5 arc second wide and I could easily resolve it. On that night it stretched right across the centre 60% of planet's longitude. I have had other nights of good and even excellent seeing but those incredible, "eyes popping out of my head," nights will stay with me forever!Bigzmey wrote: ↑Sun Feb 04, 2024 3:22 am That's correct. In my desert environment seeing typically poor and I would only get a few nights per year where I can take full advantage of the aperture of my big scopes on planets and Moon. But those nights are really fantastic.
Good part is that even at poor seeing you will take full advantage of the aperture on DSOs.
Thanks Bigzmey. I think the big plus with EV 9.25 over the EV 8 Edge HD asside from
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