Bu then I forgot that regular camera lens won't come to infinity focus after removing the low pass filter, last time I made the same mistake in Chek King (赤徑) and life has to repeat the same failure.
Given the failure last time, I didn't realize that until after several shots. To solve the problem, I found that EF lens could reach infinity focus with a CLS filter installed in front of the CMOS, but then EF-S lens was not compatible with the drop-in CLS filter. So, I'll have to come back to EF lenses.
It was Tuesday night, but we still got two other groups around. One was a family, they even setup a campfire, singing some Christian hymns with guitar. I went to the other side of the wind in order to get rid of the smoke.
My minimalist setup, but yet still quite comfortable, for I've a carbon fiber foldable camp chair.
Here are the out of focus shots before bright moon light comes! By then, I didn't even need a flashlight to move around the campsite. I even have to use eye patch to sleep inside the tent. Temperature was below 10 degree Celsius, but I forgot to bring my thermometer to tell the actual reading. Wind kept sneaking into my tent, moving the inner mesh wall.
I got only a small tripod.
I shall try to make some star trails next time if the sky was not great, and then I shall try to bring a tracking mount when the sky might be better. This is not a perfect site for astrophotography, but then it's reachable to me easily.
After maybe around two hours, I went to sleep. Breakfast time on the next morning!
On the way leaving the site, I found the grass land besides the helicopter pad could be a good spot for imaging.
We should stay outside the landing pad, in order not to hinder any emergency mission.
For ultra-portable setup, I shall use a fixed short tripod.
For tracked imaging, I shall use a taller tripod, in order to do the polar alignment.
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