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Advantage Hobby . Revolution Models . CarbonXtreme

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Aerial Photography and Video > Need Help With Aerial Spherical Please
 
 
AirFoilAviation
Veteran
Location: IL.

It does have tilt but not needed. Once you set it just tighten the left side down to always hold that angle, then remove the tilt servo if wanted.

As you know pan is 360 degrees in 10 seconds is what we have found works the best for Jami to stitch with. You can increase the speed we just don't. The camera lowers it's self via two actuators so the 180 degree view is now 3" below anything to obstruct the view. For center cloud shots yes we just found great cloud days and shoot straight up from the ground then edit and save for future use.

The camera is on the direct center using a servo driver that once programmed moves the mount 25% then snaps 3 pics and then again doing this 4 times. It's not the way everyone is doing it but this is what she seems to like best. Total pics are 5 or 6, generally 5.

We don't use a down link just up and shoot. Probably the simplest job you could do except it's mostly from the boat for resorts.

John

Team AirFoil
05-09-2008 04:52 PM
 
 
rerazor
Elite Veteran
Location: Mich.

I use a modded Mini Pro 1 with a dedicated Pano gimbal (fixed angle, no servo). You want to spin that mount as fast as possible unless you fly with no wind or a carvec. It can be a stitching nightmare if the heli moves during the 360 rotation.
05-09-2008 06:04 PM
 
 
CKY
Veteran
Location: Sunshine Coast, BC, Canada

The great thing about panos...

No camera man is really required
Artistic framing, FOV etc. not required

Just put the heli where you want, fire off the pictures as fast as you can, run them through the computer programs you use and you have the Pano.

If high enough, and no intermediate objects, telephone poles, light standards, etc. parralax will be of little issue if the heli does not drift much.

The idea of having the camera turn at a set and constant rate is a good one. Only problem is it will be moving as the shutter operates.

Really not a problem as my XTi at 10mm, will maximum render at 12K x 6K for the layered jpg. The panos will be optimum around 4K x 2K renders. Could be bigger but downloading speed becomes a problem.

What all that really means,

With a shutter speed of 1/1000th of a second, rotation speed of 10 seconds per revolution, frame rate of 1 picture per second, max resolution af 12K for 360degrees.

You will get 1.2 lateral pixal movement (blur) which really means your final resolution will still approach over 5000 pixals around.

That will still give a VERY good pano viewed on a web page.

If you could build an interupter that could stop the camera for the short interval while the picture is being taken, now you would have something.

Using longer lenses to get absolutely 'killer resolution panos' would now be an option.

Back to the shop...

Chris
05-09-2008 06:07 PM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

Quote 
If you could build an interupter that could stop the camera for the short interval while the picture is being taken, now you would have something.
Those are out there and I know some guys have used them but I think some of them come with their limitations.

If you're spinning at 1 revolution in 3 seconds, what kind of shutter speeds are you using?


Tony
05-09-2008 06:30 PM
 
 
AZ ChopperCam
Veteran
Location: Arizona

Quote 
If you're spinning at 1 revolution in 3 seconds, what kind of shutter speeds are you using?

1/1200 and if it's really sunny 1/2000. It sounds like an issue and all the new guys starting panos think you will end up with blurred shots but I can assure you they turn out magnificent. Just look at any of my panos on my site. All were shot at a minimum of 1/1200 and many faster than that.

Unless you are a super pilot or have spectacular position and altitude hold devices, the key to a good spherical pan is shooting as fast as possible to minimize helicopter movement. Depending on altitude and near field object distances, variations in position as little as a couple feet can get you shots that are nearly useless when it comes time to stitch.
05-09-2008 06:38 PM
HOMEPAGE  
 
 
MPA
Elite Veteran
Location: Australia

Quote 
If you could build an interupter that could stop the camera for the short interval while the picture is being taken, now you would have something.

One of the benefits of going to a software driven cam mount system for our poles was the ability to add "Pano Bot" features easily to do start and stop positioning and shooting for Pano & Sphericals and other sequences..
one button push to run.
Adding a leveling base to it next so they can do interior VT's at properties which they use a Bogen or other manaul indexed pano head for normally that takes a lot longer to use than the pano bot.
Using the same mount they use on the pole owners may not need to buy the manual one in future.

Dave

www.polecam-systems.com
05-09-2008 06:41 PM
HOMEPAGE  
 
 
CKY
Veteran
Location: Sunshine Coast, BC, Canada

Cr*p DJ, now you have me hooked on LARGE rectiliars shown in vr format.

Allways like your stuff
05-09-2008 06:51 PM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

OK...we've shot around 1/1200 with our mount rotating once in 6 seconds but I was testing the other day and had it up to 1 rotation in 4 seconds but thought that was too fast.


Tony
05-09-2008 07:07 PM
 
 
CoastalTom
Senior Heliman
Location: Foley, AL (7 miles N of Gulf Shores/Orange Beach)

Quote:

Back to the shop...

Chris


Hey Chris............... get back to the shop. I wanna shoot some panos soon!

TP

Tommy Patterson - Gulf Coast Aerials
05-09-2008 07:09 PM
HOMEPAGE  
 
 
AZ ChopperCam
Veteran
Location: Arizona

Quote 
1 rotation in 4 seconds but thought that was too fast.


it could very well be too fast depending on your focal length. one pan in 3 seconds shooting with a 10mm fisheye is acceptable, but at 28mm it's not.

What lens were you using?
05-09-2008 07:21 PM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

Quote 
it could very well be too fast depending on your focal length. one pan in 3 seconds shooting with a 10mm fisheye is acceptable, but at 28mm it's not.
Didn't actually shoot at that rotation speed (just testing on the bench to see how fast the mount would rotate). We've shot 180s with a 20mm, 1/1200 at 1:6 speed with great results.

Has anyone used a 4.5mm f2.8 fisheye?


Tony
05-09-2008 07:37 PM
 
 
AZ ChopperCam
Veteran
Location: Arizona

Quote 
Has anyone used a 4.5mm f2.8 fisheye?

Personally, I wouldn't use a circular fisheye. Less pixel density than a full frame fisheye.
05-09-2008 07:50 PM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

Aren't most using an 8mm or 10mm?


Tony
05-09-2008 08:03 PM
 
 
AZ ChopperCam
Veteran
Location: Arizona

yep. Sigma 8mm for crop Canons or Nikkor 10.5mm for crop Nikons

Sigma now has a 10mm full frame fisheye which looks very promising
05-09-2008 08:05 PM
HOMEPAGE  
 
 
AirFoilAviation
Veteran
Location: IL.

Tony
Shooting with the Cannon EF15mm f2.8 Fish eye and loving it. I had a friend tell me I wouldn't regret going to that lens and he was right.

Jami can stitch a sphere in about 2-3 hours now just because of the quality of the pics.

Hope that helps.

John

Team AirFoil
05-09-2008 08:43 PM
 
 
aambrose
Elite Veteran
Location: Pana, IL

Quote 
Shooting with the Cannon EF15mm f2.8 Fish eye and loving it.
You're using that on the XSi? You came over to the "dark side"!

Thanks!


Tony
05-09-2008 09:07 PM
 
 
AZ ChopperCam
Veteran
Location: Arizona

It should take 30-45 minutes to stitch most aerial panos and that's including fixing parallax errors and adding in the sky.

Which software packages is she using?

hmmm..... I'm thinking more and more about producing an instructional DVD on the subject. Sounds like there'd be quite a need.
05-09-2008 09:11 PM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

I wrote an Action in Photoshop that will do it in about 15 minutes. Just kidding! I bet that got a rise out of some people! Just keepin' it light.
Quote 

hmmm..... I'm thinking more and more about producing an instructional DVD on the subject. Sounds like there'd be quite a need.
How about a FREE online tutorial! Maybe noobs will help!


Tony
05-09-2008 09:20 PM
 
 
BULLSEYE
Senior Heliman
Location: Texas

Instructional DVD, that's brilliant!! I would be the first to buy. Would this cover PT Gui and Photoshop CS3?

I wish you still had your heli ship that way you could have done a dvd series on how to set-up your pano rig and what equipment you recommend.
05-09-2008 09:47 PM
 
 
gjestico
Senior Heliman
Location: Vancouver, B.C.

Quote 
One of the benefits of going to a software driven cam mount system for our poles was the ability to add "Pano Bot" features easily to do start and stop positioning and shooting for Pano & Sphericals and other sequences..
one button push to run.


But do you have one of those flying under a heli.....
05-10-2008 02:19 AM
HOMEPAGE  
 
 
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