Wind on the camera was mentioned earlier as a possible source of motion blur leading to soft images.
Another source of motion blur would be if you are releasing the shutter by touching the touch screen. A $20 wired remote is a very good investment for astro and other slow-shutter work, but you could test this by using the self-timer.
This is also one of the areas where the superior dampening of a carbon fiber tripod can make a big difference over aluminum. The ever-so-slight vibrations of the camera & tripod settling can be hugely magnified at super telephoto focal lengths.
Lastly, it’s also a good time to experiment with mirror lock up if you’re on a DSLR. The mirror bounce can also induce vibration.
Apologies if I missed any of these points being addressed earlier in the thread… I just happened to notice the OP’s mention of touch screen shutter release and it started me thinking about all the vibrations.
As I said, my memory isn't the greatest, but I don't recall there being any noticeable wind. In fact, I had not gone out the previous night specifically because of wind.
I use either the Bluetooth remote or the Camera Connect phone app to trigger the shutter.
I don't have a top of the line tripod, but it's also not a cheap one.
Yeah, I have thought about experimenting with the mirror lock up as well, just haven't done it yet.
No problem, all feedback is appreciated.








