Double stacking the Coronado SM90 with a Daystar Quark works well to really narrow the bandwidth and bring out the contrast in hydrogen alpha images. This has the effect of making the filament much darker but also bringing out the brighter plage from the remains of a previous active region. Taken with the FLIR GH3 ICX814 camera.
The sun is quiet at the moment, a small filament when looking closer reveals a region of plage that shows relic active regions from previous rotations. Apart from that very little is going on, even the prominences are small. Taken with the Coronado SM90 with a FLIR GH3 ICX814 camera.
A quick CaK full disk in between the passing clouds, seeing was awful and very difficult to find focus. Still nice to see the active regions we currently have, even if the image is soft. Taken with the 40mm f10 and 2x cemax barlow, grasshopper ICX814 camera. Hoping for some better images tomorrow!
Happy whilst observing on Sunday morning to see the silhouette of a plane pass in front of the sun. I quickly checked flight radar and was surprised to see it was Icelandair flight FI450. Taken with the SM90 double stacked with the Daystar Quark and PGR Grasshopper 3 ICX814 camera using 2x2 binning.
Using the same setup as in the previous image the sky was blue for long enough to try a bit of a timelapse, only 8 minutes here but it shows the sun doesn't stay the same for long!
One of the ways to get more detail and contrast when imaging the sun is to use a double stacked filter, Thows the region of plage on the limb. Coronado SM90, Daystar Quark and the PGR Grasshoppr 3.
Very little to see on the full disk in Ha this weekend, just a small region of quiet plage departing the limb. Not even any proms to speak of! Taken with the Coronado SM90 with the PGR Grasshopper 3 ICX814 camera.
