Star Trail

2020.03.02 (First Attempt)

Location: Rooftop@MPK 21, Menlo Park, CA (just a random place around Zone 8)

Shot:

• Camera: Sony A7II (with application: Time-lapse, link)
• Focus Mode: Manual Focus (focal distance is close to ∞)
• ISO: 100
• Shutter speed: 10 s
• Aperture: f/1.4
• Interval: 15 s
• Shots: 120
• Duration: 00:29:45

Editing: Capture one 20

Stacking: Python (see Appendix 1). I originally planned to use professional application for image stacking, but for previewing purpose I tried a random python code from the net and the output looks (unexpected) good.

Appendix

1. Star trails image stacking in python (also see stackoverflow)

from PIL import ImageChops, Image
import os
import sys

fnames = [f"DSC0{i}.jpg" for i in range(5016, 5135+1)]

finalimage=Image.open(fnames[0])
for i in range(1, len(fnames)):
	fname = fnames[i]
	if not os.path.isfile(fname):
		continue
	# print(i)
	currentimage=Image.open(fname)
	finalimage=ImageChops.lighter(finalimage, currentimage)
finalimage.save("allblended.jpg","JPEG")