Sun H-Alpha ASI290mm cooled version.

watcheroftheskies

Hi'

Here's a quick first light using the ASI290mm using my Lunt H-Alpha OTA.

My old USB II ASI120mm used to give terrible Newton's rings but I was very pleasantly surprised to see that with my 290mm cooled version I don't get them.

Here's the first light result, sadly no proms or sun spots.

Keith