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Nikon DSLR Cameras
D3500
How to lock focus on D3500?
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<blockquote data-quote="blackstar" data-source="post: 726026" data-attributes="member: 47518"><p>Thanks, Nick for your detailed explanation and description on all about focus.</p><p></p><p>Following your direction, I did a small experiment: shooting mode=P (handheld), BB=AF-on, Focus mode=AF-C, Focus area=single point, etc. Then press BB to focus an object (use viewfinder); while still holding BB, press shutter to make (catch) a shot; release BB while still on focus, press shutter for a second shot; move camera around and back to the same position, without pressing BB again and look like still on focus, press shutter for a third shot. The outcome: 1st shot is the worst (everything in the photo moving probably due to hand's vibration caused by holding one button and pressing another plus VR is off), 2nd is the best (sharpest), 3rd is a little off focus compare to the 2nd -- though I think it's on focus when taking the shot, but apparently moving camera after releasing BB will (slightly) move the focus ring too! And the range of off-focus could depend on how much and how vigorously the camera moved. I have thought and expected the 1st would be the best IF I CAN KEEP MY HAND STEADY WHILE HAVING TWO FINGERS HOLDING AND PRESSING TWO BUTTONS. Let me know if my interpretation of the test result goes out of line. </p><p></p><p>I may later take another real experiment to use BBF on hyperfocal distance for a night star shot in M mode and specific exposure. Is this realistic? The key is that I'll use BB to focus hyperfocal distance and then release BB and turn to sky to take shots (turning to the sky will be many big motions on a tripod... )</p><p></p><p>Thank you all for the help and inputs.</p></blockquote><p></p>
[QUOTE="blackstar, post: 726026, member: 47518"] Thanks, Nick for your detailed explanation and description on all about focus. Following your direction, I did a small experiment: shooting mode=P (handheld), BB=AF-on, Focus mode=AF-C, Focus area=single point, etc. Then press BB to focus an object (use viewfinder); while still holding BB, press shutter to make (catch) a shot; release BB while still on focus, press shutter for a second shot; move camera around and back to the same position, without pressing BB again and look like still on focus, press shutter for a third shot. The outcome: 1st shot is the worst (everything in the photo moving probably due to hand's vibration caused by holding one button and pressing another plus VR is off), 2nd is the best (sharpest), 3rd is a little off focus compare to the 2nd -- though I think it's on focus when taking the shot, but apparently moving camera after releasing BB will (slightly) move the focus ring too! And the range of off-focus could depend on how much and how vigorously the camera moved. I have thought and expected the 1st would be the best IF I CAN KEEP MY HAND STEADY WHILE HAVING TWO FINGERS HOLDING AND PRESSING TWO BUTTONS. Let me know if my interpretation of the test result goes out of line. I may later take another real experiment to use BBF on hyperfocal distance for a night star shot in M mode and specific exposure. Is this realistic? The key is that I'll use BB to focus hyperfocal distance and then release BB and turn to sky to take shots (turning to the sky will be many big motions on a tripod... ) Thank you all for the help and inputs. [/QUOTE]
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Nikon DSLR Cameras
D3500
How to lock focus on D3500?
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