Prom Oct 18 2021 SW quadrant
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Prom Oct 18 2021 SW quadrant
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Re: Prom Oct 18 2021 SW quadrant
Ferengi Rule of Acquisition #59
Free advice is seldom cheap
"Sometimes having is not so pleasing as wanting, it's not logical but it is true"
Commander Spock
Canon DSLR's R7, R6II, 5D, 7D2, 90D 21 lenses incl. 100-400L mk ii, 70-200L mk iii f/2.8, RF600/11
Lunt LS50 DS, LS80 DS, Lunt 102ED, Stellarvue SV80 APO, Orion ST80, 127 MAK, Skywatcher Evostar 120ED, 102 MAK, Celestron 8" Edge HD, 102AZ
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Re: Prom Oct 18 2021 SW quadrant
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Re: Prom Oct 18 2021 SW quadrant
That brings up an interesting question in my feeble mind. If I'm not mistaken, the 120ED has a focal ratio ofBen Cartwright SASS wrote: ↑Mon Oct 18, 2021 10:51 pm It was a really tough day, very unstable air especially with my 120ED, should have changed to the 100
Your thoughts?
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Re: Prom Oct 18 2021 SW quadrant
I think it is not so much the F ratio but the aperature, 80 will be less affected by bad seeing than a 100 or a 120
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Canon DSLR's R7, R6II, 5D, 7D2, 90D 21 lenses incl. 100-400L mk ii, 70-200L mk iii f/2.8, RF600/11
Lunt LS50 DS, LS80 DS, Lunt 102ED, Stellarvue SV80 APO, Orion ST80, 127 MAK, Skywatcher Evostar 120ED, 102 MAK, Celestron 8" Edge HD, 102AZ
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Re: Prom Oct 18 2021 SW quadrant
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Re: Prom Oct 18 2021 SW quadrant
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Re: Prom Oct 18 2021 SW quadrant
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Re: Prom Oct 18 2021 SW quadrant
Exactly so.Ben Cartwright SASS wrote: ↑Tue Oct 19, 2021 4:24 pm my 102ED is a Lunt and it is f/7.5, my SW 120ED is 7.5 and my Stellarvue is I think f/6
I think it is not so much the F ratio but the aperature, 80 will be less affected by bad seeing than a 100 or a 120
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