So much for the EVF being insufficient for action.....

Started 6 months ago | Discussions thread
enemjii
Senior MemberPosts: 1,066Gear list
Like?
it takes one-tenth of a second for the brain to process what it sees
In reply to Sante Patate, 5 months ago

Sante Patate wrote:

Ontario Gone wrote:

Well in case anybody else hasn't heard, Fuji just dropped a bomb [...] they also ratcheted down the lag. We are looking at a 0.005 sec lag time, not bad eh?

A bird flying at 60 km/h travels 8cm in 5 milliseconds. With a 200mm lens, on APS-C, giving an AoV of 8 degrees, a bird with a two metre wingspan fills the frame if it is 11 metres away. Obviously, you want to centre it in the frame. That is not easy if you have an OVF, and what you see as you move the camera tracks the bird's motion with no delay. But the 5 miilisecond lag time corresponds to 0.4 degrees, one twentieth of the frame, so by the time you see it in the centre, it is actually off the far edge.

I am sure it is possible for the human brain to learn to compensate for the viewfinder lag, but in my experience that is a very steep learning curve even if the motion is predictable.

When human eyes see an object, it takes one-tenth of a second for the brain to process that information, said Gerrit Maus, a postdoctoral fellow in psychology at UC Berkeley.

"The fundamental problem is that our brain doesn't work in real-time," Maus said. "The brain actually works rather slow, compared to some electronics or computers that we have today. Information that the brain receives from the eye is already out of date by the time it gets to the visual cortex."

"The brain does not think the object is in the position where the eye tells us it [that it] is," Maus told LiveScience. "The object is shifted forward in the direction that it's moving, so we're actually predicting where things are going to be."

This means the brain perceives moving objects to be farther along in their trajectory than what a person actually sees with their eyes, he explained.

 enemjii's gear list:enemjii's gear list
Sony SLT-A65 Sony DT 35mm F1.8 SAM Sony DT 16-50mm F2.8 SSM Sony DT 18-135mm F3.5-5.6 SAM
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
(unknown member)
(unknown member)
(unknown member)
NONew
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
YesNew
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow