Selectable shutter lag - 40ms vs 55ms

[anthony kohn]

Okay,

I have just read the white paper, and it talks about a "shorter shutter release lag time" CF. What is the tradeoff that is made for selecting this CF. Does this disable the "active mirror control" or something else?

 

[Chaos Angel]

Okay,

I have just read the white paper, and it talks about a "shorter
shutter release lag time" CF. What is the tradeoff that is made for
selecting this CF. Does this disable the "active mirror control" or
something else?

Based upon the white paper, shutter release lag time was dependent on the f/stop you chose. If you were wide open, at f/2.8 or wider (?) you'd get 40ms shutter lag and three stops from wide open would get you the slower 55ms. I don't recall the paper saying anything about shutter lag for the stops in between.

 

[anthony kohn]

I actually read the whitepaper to say that you can get 55ms when within 3stops of wide open, or you could decrease this time to 40ms. Can anyone confirm?

Okay,

I have just read the white paper, and it talks about a "shorter
shutter release lag time" CF. What is the tradeoff that is made for
selecting this CF. Does this disable the "active mirror control" or
something else?

Based upon the white paper, shutter release lag time was dependent
on the f/stop you chose. If you were wide open, at f/2.8 or wider
(?) you'd get 40ms shutter lag and three stops from wide open would
get you the slower 55ms. I don't recall the paper saying anything
about shutter lag for the stops in between.

 

[kanefsky]

I actually read the whitepaper to say that you can get 55ms when
within 3stops of wide open, or you could decrease this time to
40ms. Can anyone confirm?

This is my interpretation: By default when the lens is within 3 stops of wide open you get a consistent 55ms. When you enable PF26 you get 40ms but only wide open.

You would think you'd always want the lowest possible lag, but perhaps you get accustomed to 55ms and don't want your timing to be thrown off when you shoot wide open.

--
Steve

 

[Ken Phillips]

... it takes TIME to stop down the lens ... the camera allows a certain time for this to happen. It isn't a 'closed loop' ... IOW, the camera doesn't know when the diaphragm is in position, so enough time is allowed to cover the worst case.

If you tell the camera that you are shooting wide open, it can skip that step entirely ... and not wait for an even that will never happen.
Why is this an OPTION? Because some of us like CONSISTENT shutter release!
Ken

I actually read the whitepaper to say that you can get 55ms when
within 3stops of wide open, or you could decrease this time to
40ms. Can anyone confirm?

This is my interpretation: By default when the lens is within 3
stops of wide open you get a consistent 55ms. When you enable PF26
you get 40ms but only wide open.

You would think you'd always want the lowest possible lag, but
perhaps you get accustomed to 55ms and don't want your timing to be
thrown off when you shoot wide open.

--
Steve

--
I don't believe in fate, but I do believe in f/8!
http://www.ahomls.com/gallery.htm

 

[dogmatic]

Actually, that is pretty considerate of Canon. I value a consistant shutter lag... just waiting for that 6ms shutter lag of the 1nRS to make it on a dslr.

I actually read the whitepaper to say that you can get 55ms when
within 3stops of wide open, or you could decrease this time to
40ms. Can anyone confirm?

This is my interpretation: By default when the lens is within 3
stops of wide open you get a consistent 55ms. When you enable PF26
you get 40ms but only wide open.

You would think you'd always want the lowest possible lag, but
perhaps you get accustomed to 55ms and don't want your timing to be
thrown off when you shoot wide open.

--
Steve

--
I don't believe in fate, but I do believe in f/8!
http://www.ahomls.com/gallery.htm

--
remember, they're tools, not toys.

 

[kanefsky]

... it takes TIME to stop down the lens ... the camera allows a
certain time for this to happen. It isn't a 'closed loop' ... IOW,
the camera doesn't know when the diaphragm is in position, so
enough time is allowed to cover the worst case.
If you tell the camera that you are shooting wide open, it can skip
that step entirely ... and not wait for an even that will never
happen.
Why is this an OPTION? Because some of us like CONSISTENT shutter
release!

Yes, that's what I suggested (actually I think consistency is the default and 40ms is the option). But even then it's only consistent within a 3-stop range so you still lose that consistency if you're shooting at smaller apertures.

--
Steve

 

[Marco Miltenburg]

If you tell the camera that you are shooting wide open, it can skip
that step entirely ... and not wait for an even that will never
happen.

Why would we need to tell the camera that? It knows pretty good what aperture we should at, doesn't it? It is after all the camera that controls the lens and sets the aperture ;-)

Why is this an OPTION? Because some of us like CONSISTENT shutter
release!

That's the real reason! ;-)

Grt...