Quote:
Originally Posted by Steffen
No, not quite, only as far as the final magnification is concerned.
The f/10 scope will generally be more pleasing to look through, most aberrations will be diminished compared to the f/5 one, and it will have better apparent contrast due to the darker sky background.
IMO fast scopes are "only" good for astrophotography, or when you can't handle the longer OTA size for some reason (large OTAs can be an issue in windy conditions).
Cheers
Steffen.
|
Well I've owned a Celestron 130SLT for 5yrs which is exactly what the OP is talking about. It's a 5" F/5 system. I imaged with it and observed with 32/25/9/6 & 5mm eyepieces. I barlowed it x2, x3, used an AO on it as well. The view at native F/5 is brighter than at F/10. The contrast is also much better at F/5.