Follow Focus for Canon XH

Bill Pryor · February 15th, 2007, 10:39 AM

On the Canon, as well as the Sony Z1, the lens will go back to the same place every time, regardless of how slow or fast your turn it--the same place being the number readout in the LCD and viewfinder.

If you, say start at 3 meters and shift focus to 5 meters, you can see those numbers in the display. Shift back to 3 and you are at your beginning focus, shift the other way and you are at your end focus; speed of the shift doesn't matter. What you say is true of the older cameras, but not these. That's why I said the assistant needs to be able to see the screen. It's the same as having numbers on the barrel, basically. A bit strange to get accustomed to if you come from a manual lens world as I do, but once you get it, it's cool. So you can use the follow focus mechanisms if you want. The Z1 is probably a bit better for that than the Canon because it has its LCD screen in a better place, easier for the assistant to see.

Matthew Nayman · February 15th, 2007, 11:33 AM

HEY!,

My bad... :P

(good to know)

Does the same go for zoom?

James Collinson · February 15th, 2007, 12:05 PM

What I actually meant was how do you attach the gearing on the focus ring with the insta-focus sensor and XLR inputs covering one side of the ring?

Ben Hayflick · February 15th, 2007, 12:24 PM

Quote:

Originally Posted by Bill Pryor

On the Canon, as well as the Sony Z1, the lens will go back to the same place every time, regardless of how slow or fast your turn it--the same place being the number readout in the LCD and viewfinder.

If you, say start at 3 meters and shift focus to 5 meters, you can see those numbers in the display. Shift back to 3 and you are at your beginning focus, shift the other way and you are at your end focus; speed of the shift doesn't matter. What you say is true of the older cameras, but not these. That's why I said the assistant needs to be able to see the screen. It's the same as having numbers on the barrel, basically. A bit strange to get accustomed to if you come from a manual lens world as I do, but once you get it, it's cool. So you can use the follow focus mechanisms if you want. The Z1 is probably a bit better for that than the Canon because it has its LCD screen in a better place, easier for the assistant to see.

Great to know the A1 focus is spatially repeatable with or without follow focus. That kind of makes the whole "lack of mechanical focus ring" issue almost moot, it would seem.

My big question is, how usable are those distance readouts? Since focusing in HD is apparently so critical (a matter of inches?), are distance readouts in iterations of feet small enough to be useful? Does a readout of say "10 feet" actually reflect something like a 12-inch range, and if so, wouldn't that be enough to make the readout numbers too coarse for critical focus pulls?

Now that I think of it: does the A1 in fact have focus readouts which are finer than feet? "10.4 feet, 10.5 feet," etc...?

Bill Pryor · February 15th, 2007, 01:34 PM

I have mine set on meters because I think that way from years of using a 2/3" lens whose meter readings were easier than feet. But yes, it gives you
.1 increments, like 3.1, 3.2 meters, etc.

OK, I just checked out feet, and it does the same thing...3.1, 3.2, 3.3 feet, etc. Much more accurate than the old manual ring. (Damn, I never thought I'd say any part of an electronic lens is any better than a "real" lens. Times change.)

Ben Hayflick · February 15th, 2007, 01:46 PM

This is excellent. So do you find those 1/10 of a foot increments fine enough for critical HD focusing?

Bill Pryor · February 15th, 2007, 02:13 PM

It's just like with a manual lens. You zoom in, focus, zoom back and shoot. If you're shifting focus, you zoom in to your end point, set it and go back to your in point. Having the 1/10 of a foot numbers is a lot more accurate than with my old manual lens. That's only slightly more than a one inch increment. I don't think there's any setting you could come up with on a 1/3" chip camera that gives you a one-inch depth of field. So yeah, it's not gonna get any more accurate than that.

I'm not sure what people talk about when they talk about focus issues in HDV. It' just like film or regular video--either the shot is sharp or it's not. I haven't used the peaking or magnification for critical focus except one time just to see if it worked. I guess in really low light it might be handy, but I don't have any problem focusing, and so far everything's been sharp.

Ben Hayflick · February 15th, 2007, 02:27 PM

Thanks for the info Bill.

Does anyone want to take a hack at the original poster's question? Kinda got buried.

Matthew Nayman · February 24th, 2007, 09:09 AM

I did just realize a problem using an FF with the A1...

Due to the IR focusing mechanism, you cannot attach a focus gear around this camera...

Poop.

James Collinson · February 24th, 2007, 05:33 PM

Yup, thats what my orignal question pointed out!!

Matthew Nayman · July 11th, 2007, 12:16 PM

Hey guys.

Finally got my Follow focus from Redrock, so I figured I would post a pic of my rig, and a glamour shot for fun.

Enjoy..

[img]www.notomatofilms.com/rig1.jpg[/img]

[img]www.notomatofilms.com/rig2.jpg[/img]

edit: If anyone can tell me why my img tag doesn't work, it would be appreciated.

Matt

Michael Y Wong · July 11th, 2007, 12:30 PM

does this help?

Rene Roslev · July 11th, 2007, 11:21 PM

Looks hot!

Is that the Varizoom/SWIT 8" with Canon battery mount? How is it for focusing HDV?

Matthew Nayman · July 12th, 2007, 08:45 AM

That is indeed the SWIT. I find focusing quite easy. Haven't gotten a soft shot yet.

Marco Wagner · July 12th, 2007, 11:30 AM

I have rig envy...

July 11th, 2007, 12:16 PM	#26
Matthew Nayman Major Player Join Date: Feb 2005 Location: Toronto Posts: 917	Pimped out A1 Hey guys. Finally got my Follow focus from Redrock, so I figured I would post a pic of my rig, and a glamour shot for fun. Enjoy.. [img]www.notomatofilms.com/rig1.jpg[/img] [img]www.notomatofilms.com/rig2.jpg[/img] edit: If anyone can tell me why my img tag doesn't work, it would be appreciated. Matt

July 11th, 2007, 12:30 PM	#27
Michael Y Wong Major Player Join Date: Jun 2006 Location: Toronto Ontario Canada! Posts: 353	does this help? Attached Thumbnails

July 12th, 2007, 11:30 AM	#30
Marco Wagner Trustee Join Date: May 2005 Location: Saint Cloud, Florida Posts: 1,043	I have rig envy... __________________ www.facebook.com/projectspecto

February 15th, 2007, 10:39 AM	#16
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	On the Canon, as well as the Sony Z1, the lens will go back to the same place every time, regardless of how slow or fast your turn it--the same place being the number readout in the LCD and viewfinder. If you, say start at 3 meters and shift focus to 5 meters, you can see those numbers in the display. Shift back to 3 and you are at your beginning focus, shift the other way and you are at your end focus; speed of the shift doesn't matter. What you say is true of the older cameras, but not these. That's why I said the assistant needs to be able to see the screen. It's the same as having numbers on the barrel, basically. A bit strange to get accustomed to if you come from a manual lens world as I do, but once you get it, it's cool. So you can use the follow focus mechanisms if you want. The Z1 is probably a bit better for that than the Canon because it has its LCD screen in a better place, easier for the assistant to see.

February 15th, 2007, 11:33 AM	#17
Matthew Nayman Major Player Join Date: Feb 2005 Location: Toronto Posts: 917	HEY!, My bad... :P (good to know) Does the same go for zoom?

February 15th, 2007, 12:05 PM	#18
James Collinson Regular Crew Join Date: Jan 2007 Location: Glasgow, UK Posts: 45	What I actually meant was how do you attach the gearing on the focus ring with the insta-focus sensor and XLR inputs covering one side of the ring?

February 15th, 2007, 01:34 PM	#20
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	I have mine set on meters because I think that way from years of using a 2/3" lens whose meter readings were easier than feet. But yes, it gives you .1 increments, like 3.1, 3.2 meters, etc. OK, I just checked out feet, and it does the same thing...3.1, 3.2, 3.3 feet, etc. Much more accurate than the old manual ring. (Damn, I never thought I'd say any part of an electronic lens is any better than a "real" lens. Times change.)

February 15th, 2007, 01:46 PM	#21
Ben Hayflick Regular Crew Join Date: Jan 2007 Location: NY, NY Posts: 55	This is excellent. So do you find those 1/10 of a foot increments fine enough for critical HD focusing?

February 15th, 2007, 02:13 PM	#22
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	It's just like with a manual lens. You zoom in, focus, zoom back and shoot. If you're shifting focus, you zoom in to your end point, set it and go back to your in point. Having the 1/10 of a foot numbers is a lot more accurate than with my old manual lens. That's only slightly more than a one inch increment. I don't think there's any setting you could come up with on a 1/3" chip camera that gives you a one-inch depth of field. So yeah, it's not gonna get any more accurate than that. I'm not sure what people talk about when they talk about focus issues in HDV. It' just like film or regular video--either the shot is sharp or it's not. I haven't used the peaking or magnification for critical focus except one time just to see if it worked. I guess in really low light it might be handy, but I don't have any problem focusing, and so far everything's been sharp.

February 15th, 2007, 02:27 PM	#23
Ben Hayflick Regular Crew Join Date: Jan 2007 Location: NY, NY Posts: 55	Thanks for the info Bill. Does anyone want to take a hack at the original poster's question? Kinda got buried.

February 24th, 2007, 09:09 AM	#24
Matthew Nayman Major Player Join Date: Feb 2005 Location: Toronto Posts: 917	I did just realize a problem using an FF with the A1... Due to the IR focusing mechanism, you cannot attach a focus gear around this camera... Poop.

February 24th, 2007, 05:33 PM	#25
James Collinson Regular Crew Join Date: Jan 2007 Location: Glasgow, UK Posts: 45	Yup, thats what my orignal question pointed out!!

July 11th, 2007, 11:21 PM	#28
Rene Roslev Regular Crew Join Date: Apr 2007 Location: Copenhagen, Denmark Posts: 49	Looks hot! Is that the Varizoom/SWIT 8" with Canon battery mount? How is it for focusing HDV?

July 12th, 2007, 08:45 AM	#29
Matthew Nayman Major Player Join Date: Feb 2005 Location: Toronto Posts: 917	That is indeed the SWIT. I find focusing quite easy. Haven't gotten a soft shot yet.