Originally posted by awscreo I wanted to get my body today, but I still have doubts since astro is one of the fields I'm interested in.
If the white dot behavior is a deal-breaker for you, it may be best to defer your purchase or consider another brand. It may well be that only some bodies are affected, but that seems highly unlikely. It may be that the behavior is addressable through a future firmware update, but I would not hold my breath.* As for those who have been vocal on the matter and the promotion of other brands, I agree, though it might be good to note that for several of those users the K-1 is only the most recent of a string of cameras from all makers, none of which have delivered to their satisfaction.
BTW, the comments regarding dark frame subtraction and noise and astro work flow are quite accurate. There is no camera available at any price from any brand that will provide beautiful, noise-free astro shots straight out of the box. Some may do better than others, but it is all a matter of degree.** All require application of technique to deal with noise, time, and the rotation of the earth.
Steve
(...not an expert on that style of shooting, but am currently spinning up on integrating wide-field astro into landscapes...the tech can be very involved...)
* Any fix requires: 1) a consistent characterization of the problem, 2) a compelling marketing rational, 3) the firmware/hardware means to implement.
** Expecting impeccable noise behavior from current generation high pixel density sensors at the limit of their performance specification is a long chase down a deep rabbit hole. Better luck might be had with medium format (e.g. 645Z) or FF at 24 Mpixels and below. At the lower resolutions, stitching is your friend.