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-   -   Autofocus with the VX2100 (https://www.dvinfo.net/forum/sony-vx2100-pd170-pdx10-companion/40019-autofocus-vx2100.html)

Charley Gallagher February 23rd, 2005 03:59 PM

Autofocus with the VX2100
 
I just purchased a used VX2100. It appears to be in superb shape but I don't know if what I am experiencing with "autofocus" is typical of the camera model or if I am having a problem.

It appears that autofocus does not work at times. Particularly if I am zoomed in pretty far. I can manually put the camera out of focus and hit the autofocus switch and it will focus instantly. If I zoom in close on a framed picture on the wall 6 feet away it doesnt seem to try to focus.

I compare to my Panasonic DVC80 and it works at all times unless zoomed from a foot away.

Also it seems to work better if its not adding gain to the picture.

Any ideas what is happening?

Mike Rehmus February 23rd, 2005 04:36 PM

There is a limit as to how close the camera will focus and it isn't very close at full zoom. Six feet is around the close limit IIRC (I don't have my manual at hand right now.)

I'm not entirely certain what your concern is about (in the sense of where the camera, and the target are in relationship to each other and the zoom positon (tele or wide) of the lens.

Charley Gallagher February 23rd, 2005 06:38 PM

Thanks for the reply, Mike.

You might have answered my question. If I stand and point the camera at a picture that is about 2' by 2' and about 7-8 feet away and zoom in on it, when the picture fills the screen the camera seems to make no attempt at all to "autofocus" on it.

I then switch to "manual" mode, put it drastically out of focus and hit the "autofocus" switch and nothing changes. It doesn't try to seek. Nothing happens.

If I am not zoomed out or zoomed 1/2 way or less it seems to work. At least if I am at 1/2 zoom and I put it in manual focus mode, and put it out of focus, switching to "auto focus" instantly focuses the camera.

I do not have this problem with my Panasonic DVC80. It always tries to use autofocus unless I am zoomed on something a foot away.

I did not try this outdoors with a lot of light but rather tried it indoors when it required 3 or 6 db of gain. I do not know if this makes a difference.

Mike Rehmus February 23rd, 2005 08:15 PM

Here's how to tell

1. Set up at the problem distance and zoom wide. Autofocus should bring the image right in. Now start zooming and at a point about 1/2 or so of the zoom range, the image will go out of focus because the lens won't focus any closer.

Kind of a PITA since my Sony Hi-8 would focus on dirt on the filter.

Rob Easler February 28th, 2005 09:32 PM

I have the PD-170 and the DVC-80. What you are seeing is the same as what I experience. Often when a bride or bridesmaid is at a distance comming down the isle at a wedding and I try to zoom and focus, the Sony does a poor job of autofocusing on the subject. I end up having to back off the soom so it can focus correctly. The panasonic always gets it right. In that way the Panny is has a better autofous thant the sony.


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