The Sun, 16 June 2021 at 13:10 UK time, Lunt 60Tha and ASI174MM This is a 10000 frame capture of the Sun with good seeing at 13:10 UK time in Nottingham. I used my Lunt 60Tha and my ASI174MM camera at 16-bit and 65 fps. The day was very hot – by UK standards – at about 28C and quite humid. I was able to use 92% of the frames which I stacked in Autostakkert. Post processing in IMppg and Photoshop CC. The image capture is a full disk and disk and proms are from the same capture. Black and White version

Images on this post were made by using the TEC140 and Celestron C925 SCT telescopes with my ASI174M mono camera. From my backyard in Nottingham on the evening of 25th March 2021 with the Moon high to the south in Leo at a phase of 86% waxing (i.e. growing towards full moon) and at an altitude of about 50 degrees above the horizon. A slightly hazy sky made for quite good seeing although it was very cold and windy and the moon was jiggling about a lot in the gusts, even inside my sheltered observatory. I had to try and time my capture runs between these gusts and passing clouds, a process that was not always successful. As a consequence I accumulated nearly 600G data for these four pictures in total, much of which had to be deleted. I was outside at the scope for about 90 minutes doing these…

One of the most important and overlooked matters to consider to prevent untold frustration in observational and imaging astronomy is being able to easily, quickly and reliably find the object you want to observe or image. The smaller the field of view of the telescope/camera/eyepiece combination, the more difficult and important this becomes. When you factor in the fact that the subject may not yet be in proper focus it is clear that just pointing the telescope in the direction of the moon, planet or object and hoping that it will be in the field of view (FoV) is a forlorn hope and leads to great frustration whilst you are hunting around trying to get the object both in focus and in the FoV. I’m a mild natured person and even I have been found cursing at the EP on many occasion trying to do this! Red Dot Finder…