Last Sunday we had clear skies in Seattle so I pulled out the old Jaegers, and with a 9mm Nagler, Cassini's division was absolutely clear, and there was some shading on the planet.
Thrilled by Sunday's success, I thought I would try an early morning session with Jupiter. At 0500 Jupiter was high in a clear, southern sky. At first look with a 32mm U.O., and a minus violet filter there were two bands and the four Gallilean Moons (a good start I thought). However,any attempt to increase power resulted in a washed out lifeless orb. The viewing conditions were not the issue. It was the dreaded chromatic aberration. The minus violet filter didn't even put a dent in it.
I have been thinking long and hard about a chromacor, but I have been on the fence because of expense, and I'm not sure how easy they are to use with different eyepieces. Has anyone had good results using a variable polarizing filter on planets? My goals are to see detail on the surface of Saturn and in the rings...I would also like to be able resolve the red spot and more than two bands on Jupiter. If the only way to get that type of performance out of a fast achormat would be with a chromacor then it would unquestionably be worth the price but if a polarizing filter would do it, then that would be even better.
Thrilled by Sunday's success, I thought I would try an early morning session with Jupiter. At 0500 Jupiter was high in a clear, southern sky. At first look with a 32mm U.O., and a minus violet filter there were two bands and the four Gallilean Moons (a good start I thought). However,any attempt to increase power resulted in a washed out lifeless orb. The viewing conditions were not the issue. It was the dreaded chromatic aberration. The minus violet filter didn't even put a dent in it.
I have been thinking long and hard about a chromacor, but I have been on the fence because of expense, and I'm not sure how easy they are to use with different eyepieces. Has anyone had good results using a variable polarizing filter on planets? My goals are to see detail on the surface of Saturn and in the rings...I would also like to be able resolve the red spot and more than two bands on Jupiter. If the only way to get that type of performance out of a fast achormat would be with a chromacor then it would unquestionably be worth the price but if a polarizing filter would do it, then that would be even better.