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#11
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A few birds and auto-focus be damned.
On 4/3/2018 8:36 PM, Savageduck wrote:
On Apr 3, 2018, PeterN wrote (in article ): On 3/16/2018 12:34 PM, Savageduck wrote: snip The important thing to remember when it comes to IS/OS/VR is that it is there to provide a fix for camera shake, not subject movement, and once you have a shutter speed over 1/500 sec IS/OS/VR is irrelevant as the high shutter speed should freeze all subject movement. Since you shot those ducks at 1/2000 you could probably have managed without IS. I usually turn off IR for any critter tracking, as it slows down the tracking a tad. The shutter speed stability depends on the user's individual hand stability, speed of the critter, and the focal length of the lens. I am not too sure that “shutter speed stability” is the term you are looking for. This is the first time I have heard it used. If when shooting handheld, and you have a static target/subject, relatively slow shutter speed (usually slower than 1/120-1/80), and a longer focal length IBIS, or ILIS (IS/OS/VR) is going to be a great help.The greatest benefit will be found with handheld landscapes, or portraits. When it comes to moving targets/subjects a shutter speed, direction of movement relative to the photographer, and camera handling techniques are going to be far more beneficial than any mechanical stabilization. The only time stabilization can help with a moving target/subject is when the movement is directly away, or towards the photographer. When shooting with a panning motion the camera is stabilized by the inertia imparted to the camera system by the lateral movement of the camera tracking the target. i am talking about shooting fast moving objects, at a high shutter speed. I agree that IS is indispensable for slow moving objects and when shooting at slow shutter speeds. -- PeterN |
#12
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A few birds and auto-focus be damned.
In article , PeterN
wrote: I usually turn off IR for any critter tracking, be sure to leave uv on. So I made an obvious typo. it's not the first time and certainly not the last. as it slows down the tracking a tad. actually it doesn't, since stabilization is an independent system which keeps the subject steady in the frame, making it *easier* for focus tracking to work. it takes time to stabilize. the delay is only at the start. after that, stabilization is continuous, improving both autofocus and subject tracking. This image would not be the same with stabilization. without a controlled comparison of photos taken with and without stabilization, there's no way to know what differences there will be, if any. for all you know, a stabilized version would be better. |
#13
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A few birds and auto-focus be damned.
In article , PeterN
wrote: I am not too sure that shutter speed stability is the term you are looking for. This is the first time I have heard it used. If when shooting handheld, and you have a static target/subject, relatively slow shutter speed (usually slower than 1/120-1/80), and a longer focal length IBIS, or ILIS (IS/OS/VR) is going to be a great help.The greatest benefit will be found with handheld landscapes, or portraits. When it comes to moving targets/subjects a shutter speed, direction of movement relative to the photographer, and camera handling techniques are going to be far more beneficial than any mechanical stabilization. The only time stabilization can help with a moving target/subject is when the movement is directly away, or towards the photographer. When shooting with a panning motion the camera is stabilized by the inertia imparted to the camera system by the lateral movement of the camera tracking the target. i am talking about shooting fast moving objects, at a high shutter speed. I agree that IS is indispensable for slow moving objects and when shooting at slow shutter speeds. stabilization doesn't do anything for subject motion. stabilization helps *camera* motion, generally when shooting at slower shutter speeds. it can be used at higher speeds, but it's not as useful and can potentially alias. |
#14
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A few birds and auto-focus be damned.
On 2018-04-04 00:52:57 +0000, Savageduck said:
On Apr 3, 2018, Bill W wrote (in ): On Tue, 03 Apr 2018 17:41:28 -0700, Savageduck wrote: On Apr 3, 2018, nospam wrote (in ) : In , PeterN wrote: The important thing to remember when it comes to IS/OS/VR is that it is there to provide a fix for camera shake, not subject movement, and once you have a shutter speed over 1/500 sec IS/OS/VR is irrelevant as the high shutter speed should freeze all subject movement. Since you shot those ducks at 1/2000 you could probably have managed without IS. I usually turn off IR for any critter tracking, be sure to leave uv on. UV? You're slipping... OK! OK! I missed Peter’s typo goof. How many days are you given? :...-( -- teleportation kills |
#15
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A few birds and auto-focus be damned.
On 2018-04-04 01:22:14 +0000, Bill W said:
On Tue, 03 Apr 2018 17:52:57 -0700, Savageduck wrote: On Apr 3, 2018, Bill W wrote (in ): On Tue, 03 Apr 2018 17:41:28 -0700, Savageduck wrote: On Apr 3, 2018, nospam wrote (in ) : In , PeterN wrote: The important thing to remember when it comes to IS/OS/VR is that it is there to provide a fix for camera shake, not subject movement, and once you have a shutter speed over 1/500 sec IS/OS/VR is irrelevant as the high shutter speed should freeze all subject movement. Since you shot those ducks at 1/2000 you could probably have managed without IS. I usually turn off IR for any critter tracking, be sure to leave uv on. UV? You're slipping... OK! OK! I missed Peters typo goof. It's okay. We're a forgiving lot around here. Peter is silent... -- teleportation kills |
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