How intelligent is IBIS?

Started 2 months ago | Discussions thread
OP Spoff New Member • Posts: 9
Re: How intelligent is IBIS?

bodeswell wrote:

Spoff wrote:

Yes it works that way but I was just wondering as due to the fact that it is working does it then tell the camera you can use a slower shutter speed, lower ISO, etc. If it doesn't then it would be nice if it said how many stops you were getting out of it, so for instance if you were shooting inside at the shutter\aperture speeds for the exposure you wanted without IBIS, turning it on would say it is giving 4 stops of improvement so one could change the ISO from 1600 to 100 - that kind of thing. Maybe it doesn't and one just has to experiment to find out how much they are getting with each lens and then they just know they have additional flexibility when setting ISO and shutter speed going forward.

Or if one is in a situation without IBIS that would require a 1/80 second shutter speed at a chosen ISO, then when activated the camera would automatically know that the IBIS is giving a 4 stop improvement and then lower the ISO or shutter speed depending on options\preferences you have preset.

The question would also apply to automatic mode, which I don't use. Does the camera know it is getting some IBIS latitude and thus shoot with a lower ISO, smaller aperture, or slower shutter speed automatically?

I don’t think so. The camera can measure light before you shoot and set shutter speed or aperture appropriately, but it can’t measure how steadily you will hold the camera in advance of the shot. IBIS tries to compensate for camera movement in real time.

Makes sense. I mean it could use some general rules like if it knows the lens and other things but if it did that depending on the person like you say it could under or over-compensate the settings adjustment. Oh well, it is not hard to remember, but I will need to come up with new "rules" for each lens with the R5, knowing what general shutter speeds I can get away with at different focal lengths. I had been going by the old general example of for instance with a 100mm lens I should use a shutter speed no slower than 1/100 without any IS, but that may be outdated anyway with these higher megapixel cameras.

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