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<blockquote data-quote="blackstar" data-source="post: 726446" data-attributes="member: 47518">Ok, after several experiments and tests, I have come to the conclusion on focus for (at lease) my case. It turns out Nick is right about whether D3500 provides full BBF function. It doesn't -- whenever there is nothing or nearly nothing (e.g., empty wall, empty sky even with high cloud or dark sky even with bright stars) in view, shutter won't fire! So BBF with D3500 won't work for my planed star-shooting. However, BBF will be used for most of the other shootings for me. I have decided to use MF (thanks to Walt's suggestion) with hyperfocal distance for night-sky shooting after two-night trials. The first night, I was wrong to use a lighting subject for HF and got all stars out of focus... Next night, I used a non-lighting subject to make HF and the outcome is acceptable (for the test) if not great due to immense light pollution in the area. [ATTACH]331492[/ATTACH][ATTACH]331493[/ATTACH][ATTACH]331494[/ATTACH]</blockquote>

[QUOTE="blackstar, post: 726446, member: 47518"] Ok, after several experiments and tests, I have come to the conclusion on focus for (at lease) my case. It turns out Nick is right about whether D3500 provides full BBF function. It doesn't -- whenever there is nothing or nearly nothing (e.g., empty wall, empty sky even with high cloud or dark sky even with bright stars) in view, shutter won't fire! So BBF with D3500 won't work for my planed star-shooting. However, BBF will be used for most of the other shootings for me. I have decided to use MF (thanks to Walt's suggestion) with hyperfocal distance for night-sky shooting after two-night trials. The first night, I was wrong to use a lighting subject for HF and got all stars out of focus... Next night, I used a non-lighting subject to make HF and the outcome is acceptable (for the test) if not great due to immense light pollution in the area. [ATTACH=CONFIG]331492._xfImport[/ATTACH] [ATTACH=CONFIG]331493._xfImport[/ATTACH] [ATTACH=CONFIG]331494._xfImport[/ATTACH] [/QUOTE]

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