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HelicopterAerial Photography and Video › Maiden flight for Canon Xsi and 20mm 2.8 prime
07-10-2008 10:35 PM  9 years agoPost 1
FLAP

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Michigan

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I'm about to take my Xsi out for its first aerial along with a new 20mm prime. I'm going to want to use the video out, and know about the fact it won't auto focus like the XT will, when the Xsi is in live view. Anyone that has used one in 'live viee' mode got any last minute advice? Any tips regarding how to lock in proper focus in manual mode? I'm spoiled by the old XT autofocus.

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07-10-2008 11:51 PM  9 years agoPost 2
vrwired

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Boulder County, CO

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Hey FLap..
Yeah I have shot with the XSI.. just need to set infinity.. as usual.. I just autofocus on something far away in manual live view mode... also.. I use the old "Drop the mirror" version of AF*.. I think it is much better and more consistant than the new fangled contrast auto focus setting they have introduced... I think you will agree..

but this is a prime lens I just read again.. hmm.. well depending on how "loose" the focus ring is, you might want to put a rubber band on it or something so it does not creep out of focus.. I had to do this with the 18-55 kit lens.

Other then that.. maybe bracket shoot, or just compensate EV for it being a bit brighter while its in the sky. Bracket shooting would allow you to play with HDR imaging also.. but thats up to you.

I REALY wish it would autofocus while in the air! I am thinking about putting a servo on the AF* button...

post some shots it takes with the prime lens on the XSI while its in the air.. I would love to see how they turn out.. 12 MP is alot of image to "play" with!

Good luck...

JR GSR260 - Mark IV Cam Mount
Trex 600NSP
Trex 600 to 700 Stretch
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Hornet X3D

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07-11-2008 12:06 AM  9 years agoPost 3
FLAP

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I guess I'll have to read the manual to comprehend everything you said. I'll post something when I get it figured out.

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07-11-2008 02:15 AM  9 years agoPost 4
borneobear

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Kuala Lumpur,​Malaysia.

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Been testing out this camera. Had a few flights and gave up on the live-view. Didn't like putting tape or rubber band to prevent the 'loose focus ring' issue.
Still happy with it though - 12+ megapix is huge!.

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07-11-2008 02:51 AM  9 years agoPost 5
FLAP

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Michigan

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duct tape? JB weld?

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07-11-2008 03:13 AM  9 years agoPost 6
rerazor

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Mich.

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Blue tape.....

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07-11-2008 03:15 AM  9 years agoPost 7
FLAP

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got that too. Probably easier to get off than JB Weld.

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07-11-2008 04:06 AM  9 years agoPost 8
borneobear

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Kuala Lumpur,​Malaysia.

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CA - You'll sure stay focused.

(joking - seriously)

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07-11-2008 12:22 PM  9 years agoPost 9
FLAP

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Michigan

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I assume, whatever method you use to lock in the focus ring, once locked in...future adjustments won't be necessary?
75-400 is the usual range for me, with most being 150-200 feet.

Anyone out there using DSLR's, manual focus, that can confirm this?

Early on I had given the manual focus thing a try, got it wrong, and had to reshoot a job. Admittedly, I didn't put anymore effort into it other than a single try because the auto focus on the XT worked well for me. With the Xsi, I've got to figure it out.

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07-11-2008 05:50 PM  9 years agoPost 10
cameraman

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Yorkshire, England

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Hi Guys, I'm a little confused here. I'm just about to get the XSi (450d here in Europe) to replace our trusty 350d. One of the reasons being that I would like to use live view to replace the mini CCD cam. Is anyone absolutely sure that the XSi won't auto focus in live view cos this would be a no-go for me. DPreview shows a video of live view focussing operating but i seem to remember that you have to enable this in custom functions. Can anyone shed any light on this

BTW, we've got the 20mm prime and it's a nice fast lens but not fantastically sharp fully open.

Cheers, David

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07-11-2008 06:07 PM  9 years agoPost 11
TCGliderguy

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Albuquerque, New​Mexico

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>CA - You'll sure stay focused.

(joking - seriously)<

I flinch every time I see something like that.... Back in the late '60's I worked in a fairly high end camera store, that rented a lot of equipment. We rented a Cinema Beaulieu 16mm move camera, with a very large Angenieux lens to some yahoos at the University of New Mexico.
They called while they had the rig, and asked the department manager about what the trick was to remove the lens. The manager said "Did you try a pipe wrench?".

Yep... the camera came back the next day, with big CLAW marks in the lens barrel... still firmly stuck to the camera...

Ya gotta be careful what you say to some folks....

-Taylor

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07-11-2008 09:10 PM  9 years agoPost 12
jeffscholl

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Whitefish, MT

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"DPreview shows a video of live view focussing operating but i seem to remember that you have to enable this in custom functions."

Do you have a link to the vid?

I was using a 1Dmk3 last night tethered to a laptop and was able to change the focus in live view mode with the capture software, (which is just about the coolest thing ever since you can totally get exact focus with the magnification option). I was using a 17-40 and the AF was on, but when I hit the shutter the barrel didn't budge.

Cheers,
Jeff

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07-11-2008 10:25 PM  9 years agoPost 13
cameraman

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Yorkshire, England

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Try this:
[url=http://www.dpreview.com/reviews/canoneos450d/page10.asp]
Crucially it does not show whether or not you have to press AF button
Cheers, David

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07-11-2008 10:40 PM  9 years agoPost 14
FLAP

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Michigan

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Ya gotta be careful what you say to some folks
Now you tell me

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07-11-2008 10:45 PM  9 years agoPost 15
FLAP

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Michigan

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thanks for the vid Camerman. I think I've concluded that I will try the manual focus method.

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