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My second try processing the image (still behind Scott's):

Hi, On Father's day, I went to a friend's nut-tree farm to celebrate the beginning of the summer. Where I stayed until late night and tried my first MW shots: Site condition: (1) it's the outskirt of the city -- in the brown zone of light pollution (Bortle scale=5) vs the red zone (BS=6~7) in...

Not even close to you guys' level, but here's my first try with D3500, 100-300mm:

@wev, Are you living in "bird paradise"! Lucky you! :)

Hm... it was working when and after I uploaded the images. Have no idea what's going on! Do it again:

Hi, I have a request for recommendations on iso setting for star trails photo. I started experimenting night-star photos as shown below. Next, I would like to shoot star trails at the same scene and similar time and lighting (city night sky with heavy light pollution). It will be a single...

More trials on double-exp overlay images:

Thanks again, Fred. I found something interesting (and somewhat even more puzzling) in an article of Professor Morison's Astronomy Digest: " It is often not well noted that a single dark frame is actually quite noisy and will add noise into an image..." And so the author offers a second option...

Hi, I just wonder if NR (noise reduction) is worthy of a star trail photo taken by a long exposure, e.g., 30 min. It'll take another 30 min to finish NR after shutter is closed. Is the NR effect equivalent to the long waiting time? (I guess that after shutter is closed, the camera, etc. can be...