XL1 / XL1S focus hunting backfocus problems - Page 12 at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon XL1S / XL1 Watchdog

Canon XL1S / XL1 Watchdog
Can't find it on the XL1 Watchdog site? Discuss it here.


Reply
 
Thread Tools Search this Thread
Old September 3rd, 2003, 08:49 AM   #166
Trustee
 
Join Date: Oct 2002
Location: Atlanta, GA
Posts: 1,137
I just sent my XL-1s in for a check up. I was experiencing the same problem. I was also told that the 3ccd chip may be a little out of alienment. I will let you all know what the results are. Bob Safay
Bob Safay is offline   Reply With Quote
Old September 11th, 2003, 08:29 AM   #167
Tourist
 
Join Date: Sep 2003
Location: Fort Myers, FL
Posts: 3
Focus Problem XL1S

In attempting to film a moon-set, my XL1S using standard 16X ISII lens, I find the focus moves in and out. After reading about similar problems I tried turning off the auto-stabilize and auto-focus, but it still happnes. Is it possible my lens is defective? Or is there something I missed to correct this problem.

Thank you in advance for your help.
Julian Cauceglia is offline   Reply With Quote
Old September 11th, 2003, 09:51 AM   #168
RED Code Chef
 
Join Date: Oct 2001
Location: Holland
Posts: 12,514
In what shooting mode were you? If you are in green box easy
shooting you can't turn of those things. Make sure you are in
full manual mode.
__________________

Rob Lohman, visuar@iname.com
DV Info Wrangler & RED Code Chef

Join the DV Challenge | Lady X

Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors
Rob Lohman is offline   Reply With Quote
Old September 11th, 2003, 11:03 PM   #169
Retired DV Info Net Almunus
 
Join Date: Dec 2001
Location: Chicago, IL
Posts: 6,943
Also make sure that you are in Manual Focus mode.
__________________
Lady X Films: A lady with a boring wardrobe...and a global mission.

Hey, you don't have enough stuff!
Buy with confidence from our sponsors. Hand-picked as the best in the business...Really!

See some of my work one frame at a time: www.KenTanaka.com
Ken Tanaka is offline   Reply With Quote
Old September 12th, 2003, 05:31 AM   #170
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
Auto focus may have difficulty finding and holding focus if the lighting level is low, below ~50 lux.
__________________
dpalomaki@dspalomaki.com
Don Palomaki is offline   Reply With Quote
Old November 21st, 2003, 05:26 AM   #171
Regular Crew
 
Join Date: Nov 2001
Location: Pinehurst, NC USA
Posts: 69
High speed tennis with auto focus lense

I have read quite a few comments on the auto focus problems of the standard auto focus lense for the XL1S. (16x Zoom XL 5.5-88mm IS II)

Any suggestions for shooting instructional tennis videos from a varying distance of 40 - 50 feet and from 20 -50 feet.

The focus quite often begins to "hunt" right at the critical moment when the player makes his last move toward the ball just prior to contact.

Any suggestions would be greatly appreciated.

Thanks in advance.

AL
Alan Van Vliet is offline   Reply With Quote
Old November 21st, 2003, 06:39 AM   #172
Warden
 
Join Date: Mar 2002
Location: Clearwater, FL
Posts: 8,267
Similar requests have been made in the past. Unfortunately some sports activities are not well suited to auto focus. It may take some practice, but you'll have better success in manual focus.

The AF in most, if not all, prosumer cameras is not up to the job of tracking fast motion.
__________________
Jeff Donald
Carpe Diem




Search DVinfo.net for quick answers | Where to Buy? From the best in the business: DVinfo.net sponsors
Jeff Donald is offline   Reply With Quote
Old November 23rd, 2003, 11:20 PM   #173
Major Player
 
Join Date: Sep 2003
Location: Miami, FL
Posts: 574
Alan,

The Canon auto lenses have a hard enough time trying to hold focus on a stationary object, much less a fast moving one.

You might consider the 16X manual lens. It makes a world of difference.

RB
__________________
"The future ain't what it used to be." Yogi Berra.
www.rbravo.com
Rick Bravo is offline   Reply With Quote
Old January 5th, 2004, 02:15 PM   #174
New Boot
 
Join Date: Nov 2003
Location: Soest, Netherlands
Posts: 10
Focus critical but not critical

Hi all,
been reading for hours now.. but I'm afraid I couldn't find this problem:

I have a XL1, everything manual...

Zoom in on the back focus card. Get focus. Zoom out. The card is still sharp. But if I then put my hand in front of it (a feet or more away from the lens), my fingers are NOT sharp.

So you could say this is a back focus issue, but during the zooming out the chart stayed sharp. Critical focus doesn't seem to work? I used to shoot all the time all zoomed out and everywhere I went it was all sharp. But that was with another XL1..

Also, if I put a little force in my hands I can tell that the lens moves/seems a veeeeery little bit loose in the body. You can see a little bit of silver metal from the lens mount (more on 1 side then on the other side from the connection). Does everybody see a little bit of the mount or is your lens extremely tight to the body?

thanks all,
Mark
Mark Solleveld is offline   Reply With Quote
Old January 5th, 2004, 02:26 PM   #175
Trustee
 
Join Date: Sep 2003
Location: Saguenay, Québec, Canada
Posts: 1,051
Hum... The behavior you are describing seem normal to me. You have focused on an object (in this case the card), zoomed out, and put another object (your hand) nearer your lens. The distance between the two objects explain your focus "problem". This is called the "Depth of field". There is some things you can do to increase the depth of field, like closing a bit more your iris (an higer f number).

Hope this help,
__________________
Jean-Philippe Archibald
http://www.jparchibald.com - http://www.vimeo.com/jparchib
Jean-Philippe Archibald is offline   Reply With Quote
Old January 5th, 2004, 02:54 PM   #176
New Boot
 
Join Date: Nov 2003
Location: Soest, Netherlands
Posts: 10
Maybe I told it the wrong way..

I zoom in.. get the focus. Then I zoom out (which on 80% or so goes out of focus and then into focus again btw) and the chart seems sharp. But then.. when I walk towards the chart, it gets out of focus again. Keeping it all zoomed out of course...
I think it's supposed to keep focus walking towards the chart zoomed out, not touching the zoom. I'll try your DOF thery tomorrow when I have a bit more light, but I'm seriously having doubts..

thanks again,
Mark
Mark Solleveld is offline   Reply With Quote
Old January 5th, 2004, 04:14 PM   #177
RED Code Chef
 
Join Date: Oct 2001
Location: Holland
Posts: 12,514
Are you PHYSICALLY moving the camera after you set the focus?
If so you are also moving the focussed area and you might get
things out of focus if your lens is quite open. The more open the
lens, the less DOF.

BUT, it could be an issue with the lens itself indeed. But I'll leave
that to the lens professionals here on the forum.
__________________

Rob Lohman, visuar@iname.com
DV Info Wrangler & RED Code Chef

Join the DV Challenge | Lady X

Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors
Rob Lohman is offline   Reply With Quote
Old January 6th, 2004, 02:32 AM   #178
New Boot
 
Join Date: Nov 2003
Location: Soest, Netherlands
Posts: 10
Yeah.. moving it physically..
You know like when a presenter of the show you're taping suddenly approaches the camera, or wants to show his teeth or something. Shouldn't be a problem being all zoomed out normally..

Rob do you maybe know a good company in The Netherlands that can have a look at it? Or do you know the Canon repair-price (outside guarantee)..?

thx
Mark Solleveld is offline   Reply With Quote
Old January 6th, 2004, 08:39 AM   #179
Trustee
 
Join Date: Sep 2003
Location: Saguenay, Québec, Canada
Posts: 1,051
Your camera is not broken. Whenever you change the distance between the camera and the subject, the focus will change also. Workarounds are to focus while moving, or to try to increase the depth of field enough.
__________________
Jean-Philippe Archibald
http://www.jparchibald.com - http://www.vimeo.com/jparchib
Jean-Philippe Archibald is offline   Reply With Quote
Old January 6th, 2004, 08:57 AM   #180
RED Code Chef
 
Join Date: Oct 2001
Location: Holland
Posts: 12,514
I'm suspecting it isn't broken either and you are probably just
"seeing" it the wrong way, or we are understanding you wrong.
With that being said, I didn't notice you were from the wetland
as well. If you want we might be able to meet up some place
and I can take a look at your camera? See if I see anything
weird?
__________________

Rob Lohman, visuar@iname.com
DV Info Wrangler & RED Code Chef

Join the DV Challenge | Lady X

Search DVinfo.net for quick answers | Buy from the best: DVinfo.net sponsors
Rob Lohman is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon XL1S / XL1 Watchdog

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 10:33 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network