XL1 / XL1S focus hunting backfocus problems

Chris Hurd · April 3rd, 2002, 07:33 AM

Howdy from Texas,

<< does the software update address the "focus jump" and the "soft focus" issue? >>

In most (but not all) cases, yes. It is well worth sending the camera and lens in to Canon service, especially if they've never been before.

Charles Papert · April 3rd, 2002, 01:12 PM

<<<we used ND filtering to achieve wide open iris.>>>

And there it is. I apologize for ever doubting Neville's technique!

It was probably a knee-jerk reaction to having to go up against all those engineers over the years that insisted on having faces pinned at 70 IRE, or freaking out when I lit anyone to a greater than 2:1 ratio etc...the old "rules" of video!

April 4th, 2002, 05:36 AM

<<<--It was probably a knee-jerk reaction to having to go up against all those engineers over the years that insisted on having faces pinned at 70 IRE, or freaking out when I lit anyone to a greater than 2:1 ratio etc...the old "rules" of video! -->>>

Ah, another "oldtimer".....I too remember butting heads with the engineering brotherhood but am thankful for that experience today! Too few in the "new rules" video world understand and appreciate the value of a waveform and vectorscope.

John Klein · April 5th, 2002, 01:32 AM

Peter Koller - Just to be sure the Wt. Bal. was done ok? You said you hit the WT balance button. Did you push, hold and wait to see that the white balance took effect?

I know that manual white balancing works great for me. I also know that AWB, while inaccurate, does indeed add a nice bit of warmth. But to me it is odd to see a pink skin tone that reaches the limit of detail without being 100% white.

Ken Tanaka · April 5th, 2002, 12:15 PM

Just a note to let y'all know that I split-out the vectorscope discussion to a new thread in "General DV" titled "Vectorscopes & Waveform Monitors".

ja135321 · April 11th, 2002, 06:34 PM

Can anyone tell me why I can't focus an obect that is 4 inches from the camera lens at full zoom? I switch it to the green box and it focuses easily when its switch to manual and I turn the lens, its all a blur? I can turn endlessly and nothing. When I used the AF button, it just jumps back and forth and never focuses.

Adrian Douglas · April 11th, 2002, 10:03 PM

4 inches is too close for the lens to focus. I think the min focus distance is about 30cm(12")

Also manual focus is not available in Green Box Mode

ja135321 · April 11th, 2002, 11:16 PM

I know that in green box you cant manual focus. But If I switch it to green box it will focus. And according to the manual on page 120, the min focus distance is 13/16 inch or 2cm. Besides even if I'm 3 feet away and try to focus in on some text like the word Sony on the television I can't seem to turn the ring enough to get it to focus. Is this problem resolved with the manual focus lense?

Ed Frazier · April 11th, 2002, 11:44 PM

I just did a quick test with mine and am able to manually focus on small objects that are touching the edge of the lens hood without any problem.

ja135321 · April 12th, 2002, 10:53 AM

Ed which camera and lens do you have?

ja135321 · April 12th, 2002, 11:20 AM

I have to get a wide angle lens. If the camera is zoomed out fully, or in telephoto it will not focus on an object even 2 feet away. Physics.

John Klein · April 12th, 2002, 04:41 PM

I recall on my sony that macro required a wider focal length. I'm pretty sure that 's the same with the canon. So I think it's inherent in many lenses. Back off the zoom a little and see if you can get by. You should be able to get very close using a wider setting.

Ed Frazier · April 12th, 2002, 04:51 PM

My lens is the standard 16X that came with the XL1S. In my test, I was at a wide setting.

Don Palomaki · April 13th, 2002, 08:41 AM

Minimum focus distance with the standard 16x servo zoom lens will depend on the zoomsetting.

From the Canon XL lens specification: At full zoom the minimum subject distance is 1 meter, at full wide angle setting it is 20 mm. Smalller apertures will give more depth of field which may translate to usable focus even closer.

If you need to get to use full zoom for a macro-like shot at some distance, (e.g., for stand off distance) get a close-up adapter set, about $75 in the required 72mm size by Hoya or Tiffen. If you need higher quality, consider the achromatic diopters from Century. With the +2 you can zoom to fill the frame with a postage stamp at about 18 inches distance.

John Klein · April 14th, 2002, 11:25 PM

If memory serves me, I seem to remember the AF trying to focus on the dust on the lens itself. If so, maybe there is some truth to green mode allowing a different focus system for some reason. Dust on the lens is closer than 20 mm. But I would think that less than an inch should provide adequate macro shooting, hey?

April 3rd, 2002, 07:33 AM	#46
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Howdy from Texas, << does the software update address the "focus jump" and the "soft focus" issue? >> In most (but not all) cases, yes. It is well worth sending the camera and lens in to Canon service, especially if they've never been before. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

April 3rd, 2002, 01:12 PM	#47
Charles Papert Wrangler Join Date: Jan 2002 Location: Los Angeles, CA Posts: 6,810	<<<we used ND filtering to achieve wide open iris.>>> And there it is. I apologize for ever doubting Neville's technique! It was probably a knee-jerk reaction to having to go up against all those engineers over the years that insisted on having faces pinned at 70 IRE, or freaking out when I lit anyone to a greater than 2:1 ratio etc...the old "rules" of video! __________________ Charles Papert www.charlespapert.com

April 5th, 2002, 01:32 AM	#49
John Klein Regular Crew Join Date: Dec 2001 Location: Wisconsin, USA Posts: 182	Peter Koller - Just to be sure the Wt. Bal. was done ok? You said you hit the WT balance button. Did you push, hold and wait to see that the white balance took effect? I know that manual white balancing works great for me. I also know that AWB, while inaccurate, does indeed add a nice bit of warmth. But to me it is odd to see a pink skin tone that reaches the limit of detail without being 100% white. __________________ < >< . . . . . < >< . . . . . < ><

April 5th, 2002, 12:15 PM	#50
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	* Split Thread Notice * Just a note to let y'all know that I split-out the vectorscope discussion to a new thread in "General DV" titled "Vectorscopes & Waveform Monitors". __________________ 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

April 11th, 2002, 06:34 PM	#51
ja135321 Regular Crew Join Date: Feb 2002 Location: Los Angeles, CA Posts: 90	why cant I manually focus my auto16x? Can anyone tell me why I can't focus an obect that is 4 inches from the camera lens at full zoom? I switch it to the green box and it focuses easily when its switch to manual and I turn the lens, its all a blur? I can turn endlessly and nothing. When I used the AF button, it just jumps back and forth and never focuses.

April 4th, 2002, 05:36 AM	#48
sweeper7 Posts: n/a	<<<--It was probably a knee-jerk reaction to having to go up against all those engineers over the years that insisted on having faces pinned at 70 IRE, or freaking out when I lit anyone to a greater than 2:1 ratio etc...the old "rules" of video! -->>> Ah, another "oldtimer".....I too remember butting heads with the engineering brotherhood but am thankful for that experience today! Too few in the "new rules" video world understand and appreciate the value of a waveform and vectorscope.

April 11th, 2002, 10:03 PM	#52
Adrian Douglas Trustee Join Date: Oct 2001 Location: Chigasaki, Japan. Posts: 1,660	4 inches is too close for the lens to focus. I think the min focus distance is about 30cm(12") Also manual focus is not available in Green Box Mode __________________ Adrian DVInfo.net Search for quick answers Where to buy? From the best in the business...DVInfo.net sponsors

April 11th, 2002, 11:16 PM	#53
ja135321 Regular Crew Join Date: Feb 2002 Location: Los Angeles, CA Posts: 90	I know that in green box you cant manual focus. But If I switch it to green box it will focus. And according to the manual on page 120, the min focus distance is 13/16 inch or 2cm. Besides even if I'm 3 feet away and try to focus in on some text like the word Sony on the television I can't seem to turn the ring enough to get it to focus. Is this problem resolved with the manual focus lense?

April 11th, 2002, 11:44 PM	#54
Ed Frazier Major Player Join Date: Sep 2001 Location: Las Cruces, NM Posts: 343	I just did a quick test with mine and am able to manually focus on small objects that are touching the edge of the lens hood without any problem. __________________ Ed Frazier

April 12th, 2002, 10:53 AM	#55
ja135321 Regular Crew Join Date: Feb 2002 Location: Los Angeles, CA Posts: 90	lens? Ed which camera and lens do you have?

April 12th, 2002, 11:20 AM	#56
ja135321 Regular Crew Join Date: Feb 2002 Location: Los Angeles, CA Posts: 90	lens I have to get a wide angle lens. If the camera is zoomed out fully, or in telephoto it will not focus on an object even 2 feet away. Physics.

April 12th, 2002, 04:41 PM	#57
John Klein Regular Crew Join Date: Dec 2001 Location: Wisconsin, USA Posts: 182	I recall on my sony that macro required a wider focal length. I'm pretty sure that 's the same with the canon. So I think it's inherent in many lenses. Back off the zoom a little and see if you can get by. You should be able to get very close using a wider setting. __________________ < >< . . . . . < >< . . . . . < ><

April 12th, 2002, 04:51 PM	#58
Ed Frazier Major Player Join Date: Sep 2001 Location: Las Cruces, NM Posts: 343	My lens is the standard 16X that came with the XL1S. In my test, I was at a wide setting. __________________ Ed Frazier

April 13th, 2002, 08:41 AM	#59
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,487	Minimum focus distance with the standard 16x servo zoom lens will depend on the zoomsetting. From the Canon XL lens specification: At full zoom the minimum subject distance is 1 meter, at full wide angle setting it is 20 mm. Smalller apertures will give more depth of field which may translate to usable focus even closer. If you need to get to use full zoom for a macro-like shot at some distance, (e.g., for stand off distance) get a close-up adapter set, about $75 in the required 72mm size by Hoya or Tiffen. If you need higher quality, consider the achromatic diopters from Century. With the +2 you can zoom to fill the frame with a postage stamp at about 18 inches distance.

April 14th, 2002, 11:25 PM	#60
John Klein Regular Crew Join Date: Dec 2001 Location: Wisconsin, USA Posts: 182	If memory serves me, I seem to remember the AF trying to focus on the dust on the lens itself. If so, maybe there is some truth to green mode allowing a different focus system for some reason. Dust on the lens is closer than 20 mm. But I would think that less than an inch should provide adequate macro shooting, hey? __________________ < >< . . . . . < >< . . . . . < ><