There is a horrible bug in ASIAIR Preview (ASIAIR 2.1.1) on a 9.7" iPad Pro (iPadOS 16.4.1).
This is an image of the Sun with an ASI533MM. Notice that it has a square sensor, but ASIAIR has assumed that the camera has the aspect ratio of the iPad and scale the axes independently.
I suspect this might also be happening under night time conditions and with other cameras, but unless you are imaging the Moon, it might not be as obvious, especially if the camera's frame is rectangle too, but with a different aspect ratio. If you see oval stars on a good OTA, this could be the cause :-).
Manually switching to Video mode, and switching right back to Preview solves the problem.
The problem could also have been caused by my having a second camera (ASI290MM-mini) which has a rectangular aspect ratio. I had used the finder under Preview, before switching over to the ASI533 (but this could happen at night too when you switch over to a guide camera to focus it). The solar set up looks like this, with a "finder" piggy backing on the main OTA. The finder is just the camera together with a Fujinon robotics lens, with a solar filter attached to the lens. The barrel of the mini camera is held by telescope rings on an ARCA dovetail plate.
Focusing in the zoomed Focus window worked rather well, although ASIAIR is still missing reporting a contrast value. The chrominance layer details popped up quite nicely.
A cropped and 2x scaledown of the the stacked and sharpened image looks like this:
Lots of prominences today, by the way, even though my etalon is tuned more for chrominance.
@PMTeam@ZWO Please tell you coders never to use NSImageScaleAxesIndependently for NSImageView in iOS.
https://developer.apple.com/documentation/appkit/nsimagescaling?language=objc
Use NSImageScaleProportionallyDown or NSImageScaleProportionallyUpOrDown instead.
Please tell them to test their code before releasing it. Put this item in the regression testing list.
Chen
