The International Cessna 170 Association

Been a while since I've visited my 170 brethren, but if anyone can appreciate this footage, you fellas can. I would love to see some similar footage from inside other 170s.

http://www.vimeo.com/13694732

If the playback appears choppy, pause playback and allow the grey "buffer" bar to fully load before continuing to play, OR click he HD button on the player to toggle HD mode off.

Money for a camera and no shoulder harness?

Joel

Really interesting video Zane. Spooky to watch the prop throwing off those scmitar blades. Enjoyed the post. OLE GAR

Nice!!!

n3437d wrote:Money for a camera and no shoulder harness?

Joel

Actually the camera was free, but I'm saving for a pink stripe paint job.

Are my Aero Fab's not good enough?

The prop distortion is due to the way the CCD scans. No filter will fix that.

bsdunek wrote:The prop distortion is due to the way the CCD scans. No filter will fix that.

Actually, that's not true. The prop distortion does occur as a product of the CCD scan and frame rate, but...

You can force the camera to use a slower shutter speed by reducing the amount of light available using a neutral density filter. Its autoexposure will compensate by slowing shutter speed, which effectively blurs the movement of the prop rather than freezing its motion on each frame.

Example:

http://www.vimeo.com/9037599

1SeventyZ wrote:...You can force the camera to use a slower shutter speed by reducing the amount of light available using a neutral density filter. Its autoexposure will compensate by slowing shutter speed, which effectively blurs the movement of the prop rather than freezing its motion on each frame.

Example:

http://www.vimeo.com/9037599

Big difference in contrast, brightness and color quality, though! Seems like there should be a way to stop the lens down and get the same effect.

Wouldn't it actually stop the prop better if the incoming light were IN-creased? (thereby calling for a faster shutter-speed?)

gahorn wrote:Wouldn't it actually stop the prop better if the incoming light were IN-creased? (thereby calling for a faster shutter-speed?)

It would, but that would exacerbate the distortion effect of the prop (which is caused by the line scan of the sensor.) The objective is to eliminate the prop distortion by eliminating the visibility (blurring it) of the prop altogether.

Here's an interesting difference between 60 fps (frames per second) and 24 fps. The following video is shot with my Panasonic Lumix point&shoot still camera that also shoots HD 720 @ 24 fps. I think the prop looks great, quite unoffensive to the senses. I do sometimes notice though that the video is not quite as fluid.

http://www.vimeo.com/13216484

Joel I would be impressed if you can find a filter to fix that. What you are seeing has nothing to do with the prop. Try changing the shutter speed off of Auto and you will see what I mean. Doug

canav8 wrote:Joel I would be impressed if you can find a filter to fix that.

The pink garnish?

jrenwick wrote: Big difference in contrast, brightness and color quality, though! Seems like there should be a way to stop the lens down and get the same effect.

John, this is a tiny helmet-cam type camera. The aperture is so small that its effective range is really pointless. It's probably a fixed dia for all I know. You're right, the ND filter does degrade the contrast and color quality overall, but it is effectively the same as stopping it down in terms of total light available to the sensor. In fact, ND filters are rated in terms of stops.

If you were to shoot with, say, a Canon 7D DSLR running at 720p and 60 fps, then set time-variant mode where you can fix the shutter speed at some optimal value to blur the prop (1/125th perhaps), the auto exposure logic in the camera would constantly adjust aperture for you. Tough to get that kind of manual control with a little $300 cheapy helmet cam.

-Zane

Joel sorry I didnt read the thread close enough. Obviously you got a handle on this thing. So I will be curious as to your solution to fix this. Please report back here when you find out what you did to succeed. Thanks, Doug