To Infinity and Beyond
Jun 12, 2014 05:21:23 #
I notice that when I autofocus my Nikon 18-200 lens on a very distant object, I can still turn the manual focus ring a bit further which then places the distant object out of focus. A touch on the sputter release brings it back into focus.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
Jun 12, 2014 06:38:45 #
sinderone wrote:
I notice that when I autofocus my Nikon 18-200 lens on a very distant object, I can still turn the manual focus ring a bit further which then places the distant object out of focus. A touch on the sputter release brings it back into focus.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
So that you can focus into the 4th dimension when needed !
:thumbup:
Jun 12, 2014 06:46:47 #
When you get the camera out of a scorching hot car trunk, it may not turn past infinity. Also, it allows camera to focus at infinity without slamming into the end of travel.
Jun 12, 2014 09:58:49 #
Jun 12, 2014 12:01:05 #
sinderone wrote:
I notice that when I autofocus my Nikon 18-200 lens on a very distant object, I can still turn the manual focus ring a bit further which then places the distant object out of focus. A touch on the sputter release brings it back into focus.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
I must confess, I'm confused. How can it go beyond infinity? Please explain.
Sin, when I started, I too was confused by that.
Then I discovered that beyond infinity, is actually x-ray mode, and you can shoot right through clothes, as if none were being worn. Try it, it's a real eye popper. :lol:
Hey, seriously, in the old manual days that wasn't needed. But today's modern auto focus lenses need room to hunt, in order to aquire focus lock. The camera does that by seeing a high contrast area, and bringing it into highest contrast. It goes beyond the highest contrast, untill contrast becomes less, and then it goes back and forth then locks onto the highest contrast area(focus). I guess we can say the camera goes beyond focus, then back to focus and locks there. The camera of course does this very quickly.
So just like the Enterprise, it goes to infinity, and beyond!! ;-)
SS
Jun 12, 2014 12:06:02 #
SharpShooter wrote:
Sin, when I started, I too was confused by that. ... (show quote)
It makes photographing UFO's more accurate.
Jun 12, 2014 12:37:40 #
sinderone wrote:
How can it go beyond infinity? Please explain.
You must have the Buzz Lightyear model.
Jun 13, 2014 07:29:49 #
tradio wrote:
When you get the camera out of a scorching hot car trunk, it may not turn past infinity. Also, it allows camera to focus at infinity without slamming into the end of travel.
This is very true.. Many lens manufacturers have realized that, because of differences in the environment the camera will be used in, manual focus is not absolute on the indicator. Many lenses are made of glass and metal which have various expansion and contraction properties that will affect the focus adjustment. Plastic lenses may not be as affected by temperature differences but have issues regarding durability (though some plastic compounds may be as or more durable than metal). Autofocus, since the camera is reading the image rather than the numbers, tends to be for forgiving. The camera rarely tried to read the scale printed on the outside of the lens.
Jun 13, 2014 07:44:56 #
SharpShooter wrote:
So just like the Enterprise, it goes to infinity, and beyond!! ;-)
SS
SS
I owned the Enterprise but got rid of it. My truck with a Hemi is bad enough on fuel!
Seriously, what is infinity? It is just an arbitrary number. Does anyone know what distance the lens manufactures use as infinity for focusing? 1,000 yards, 5,000 yards? And do you really care as long as the lens focuses properly? They can stick that "infinity mark" in the middle for all I care. Just my opinion.
Jim D
Jun 13, 2014 12:16:32 #
oldtool2 wrote:
I owned the Enterprise but got rid of it.
Jim D
Jim D
Did it run on coal. I once watched a blooper film, brought to a personal appearance by James Douen [sorry for the spelling] (Scotty) and Capt. Kirk said "ahead warp factor one". It showed Scotty shoveling coal into the warp engine, AT WARP SPEED!. Cracked up the audience.
Jun 13, 2014 12:25:08 #
We identify Time as the 4th dimension. We need it otherwise we would stand still forever.
sinderone wrote:
TusconCoyote
Love your reply. Who need just 3 dimensions!
Love your reply. Who need just 3 dimensions!
Jun 13, 2014 12:25:09 #
We identify Time as the 4th dimension. We need it otherwise we would stand still forever.
sinderone wrote:
TusconCoyote
Love your reply. Who need just 3 dimensions!
Love your reply. Who need just 3 dimensions!
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