Just a note to share... at DVinfo.net

Alon Levi · October 24th, 2005, 06:39 PM

quite some time ago I find out, after using my XM-2 for about a year, something really silly : you can't set focus manually while zooming in/out.
That, in retrospect, explained many unfocused zoom-ins, that couldn't get in focus... so, when unsure about focus, and zooming in, I switch temporarly to AUTO focus. sometimes, when enought light is available, this does the job.

Just for you to know.
Alon.

Chris Hurd · October 24th, 2005, 08:24 PM

No camcorder using an auto-servo lens will have the capability to pull zoom and focus at the same time. This includes the Canon XL1 / XL1S with stock lens, the Canon GL1 and GL2, the Sony VX1000 / 2000 / 2100, the Sony PD150 / 170, and so on and so on. It's a limitation of that type of lens... on these types of camcorders, one internal motor is employed to change focal length and focal plane but it can't do both jobs at once. Hope this helps,

Dale Guthormsen · October 24th, 2005, 10:39 PM

Alon,

I have found this to be a real problem for my filming. Here is the best way to beat it on semi distant to distant subjects.

Prior to filming run the zoom out all the way to the end of the 20 x. then focus on a distant object. then you can bring the zoom in back quite a distance and still retain focus. start filming and then zoom in with focus.

this works because every lens has a point where all objects from that distance forward stay focused.

would it not be nice to have lens like savorski binoculars where everything visible is in focus all the time!!!

gus

October 24th, 2005, 06:39 PM	#1
Alon Levi New Boot Join Date: Dec 2003 Posts: 24	Just a note to share... quite some time ago I find out, after using my XM-2 for about a year, something really silly : you can't set focus manually while zooming in/out. That, in retrospect, explained many unfocused zoom-ins, that couldn't get in focus... so, when unsure about focus, and zooming in, I switch temporarly to AUTO focus. sometimes, when enought light is available, this does the job. Just for you to know. Alon.

October 24th, 2005, 08:24 PM	#2
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	No camcorder using an auto-servo lens will have the capability to pull zoom and focus at the same time. This includes the Canon XL1 / XL1S with stock lens, the Canon GL1 and GL2, the Sony VX1000 / 2000 / 2100, the Sony PD150 / 170, and so on and so on. It's a limitation of that type of lens... on these types of camcorders, one internal motor is employed to change focal length and focal plane but it can't do both jobs at once. Hope this helps, __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

October 24th, 2005, 10:39 PM	#3
Dale Guthormsen Inner Circle Join Date: Jun 2005 Location: Saskatchewan Posts: 3,048	Zooming Alon, I have found this to be a real problem for my filming. Here is the best way to beat it on semi distant to distant subjects. Prior to filming run the zoom out all the way to the end of the 20 x. then focus on a distant object. then you can bring the zoom in back quite a distance and still retain focus. start filming and then zoom in with focus. this works because every lens has a point where all objects from that distance forward stay focused. would it not be nice to have lens like savorski binoculars where everything visible is in focus all the time!!! gus