The Dutch Observatory

June 28, 2019 on 2:09 pm | In Sun | Comments Off

Good seeing, but below average transparency today on another spotless day.  However, I was able to test my new ASI120MM.  In direct focus everything is fine, and with low magnification and the tilter, things work fine also.  I now have been able to get rid of most of the concentric rings, whether they are Newton rings, or caused by USB3 interference.  So today I am attaching full disk images captured with the ASI174 and close ups of three images of the small northern filaments captured with the ASI120.  One in direct focus, one with 1.6 magnification and one with 3x magnification.  So far I feel good about it.