Testing the new filter configuration here, slightly shorter exposure times with the 394/10 instead of the K Line. Next step is to try without the KG3 to give more light - success will depend on whether the increase in IR will cause a reduction in contrast.
Things are busy at the moment and this is one of the first images I have managed to get in over a week, i'm currently going through a rebuild of my CaK filter in an attempt to get a bit more light through. This shot was taken with the 100mm Tal refractor stopped down to 60mm to give f16 at both the filter and also the camera chip. I was pleased to catch the active region before it finally heads over the departing limb.
I finally caught my first ISS solar transit! I consider myself very lucky as the day was dominated by sunshine and heavy showers, and, 5 minutes before the transit it was raining, not long after the transit it was raining. I used the 100mm Tal refractor stopped down to 60mm to give f16 at the filter and the camera chip. The seeing was bubbling away as can be seen in the animation that was taken in calcium light with pseudo colour added later. I was pleased to see in the individual frames the solar panels and also the crew modules clearly visible. At the time the space station was 725km away and travelling at a speed of 7.25km/s, with the total transit time lasting a brief 1.4 seconds.
