Jan 21, 2009: Digital Weird

[Scriveyn]

There are classic (non-digital) SLR cameras which have a slit moving across the film (focal plane shutter) rather than a central shutter. I dimly remember reading about strange effects that can be produced by these, so I looked it up on wikipedia (see quote below). - So this not an effect new or restricted to digi-cams.

Originally Posted by from wikipedia

Distortion of fast-moving objects: although no part of the film is exposed for longer than the time set on the dial, one edge of the film is exposed an appreciable time after the other, so that a horizontally moving shutter will, for example, elongate or shorten the image of a car speeding in the same or the opposite direction to the shutter movement. For an example of such distortions see this image taken with a vertically traveling focal-plane shutter, showing extreme distortion of fast-moving helicopter rotor blades.

[Knight f3]

The cellar had already documented this phenomenon. As I recall, a guy had modified a flatbed scanner to work as a digital camera and he would get similar weirdness in his photos of moving objects.
Although for a flatbed scanner, slowly moving would be enough to cause crazy images.

Still looks cool though.

[Gravdigr]

Cool how the camera even manufactured the parts of the prop that wouldn't be visible, at all. You know, covered by the nose cone. Yeah, that's cool, a camera that automatically photoshops your pics for ya. Awesome.

[Sundae]

Originally Posted by Gravdigr

Cool how the camera even manufactured the parts of the prop that wouldn't be visible, at all. You know, covered by the nose cone. Yeah, that's cool, a camera that automatically photoshops your pics for ya. Awesome.

Ooh, ooh! I want one of those, do you know where they sell them?

[Razzmatazz13]

Originally Posted by Sundae Girl

Ooh, ooh! I want one of those, do you know where they sell them?

Actually...the last time I was camera shopping, they had cameras that claim to fix blotches on your face automatically (after auto finding your face in the frame of course) and other such craziness.

This one makes you skinnier:
http://www.reginalewis.com/2007/09/1...ounds-thinner/

[barefoot serpent]

another example

[Wombat]

Originally Posted by Gravdigr

Cool how the camera even manufactured the parts of the prop that wouldn't be visible, at all. You know, covered by the nose cone. Yeah, that's cool, a camera that automatically photoshops your pics for ya. Awesome.

Nose cones don't cover the propeller blades. The blades come out the side of the nose cone. Which makes the photo plausibly real, not photoshopped.

Here are some pics of stationary propellers so you can see how the blades come out the side of the nose cone:

[Gravdigr]

Originally Posted by Wombat

Nose cones don't cover the propeller blades. The blades come out the side of the nose cone. Which makes the photo plausibly real, not photoshopped.

Here are some pics of stationary propellers so you can see how the blades come out the side of the nose cone:

So it (the camera)manufactured parts of the prop that don't even exist?

[Wombat]

Originally Posted by Gravdigr

So it (the camera)manufactured parts of the prop that don't even exist?

I can't see any parts of the prop that don't exist, so I'm not sure what you are referring to. To me, every part of the picture looks consistent with a focal-plane shutter exposure of a moving object. Yes it is weird, but I think it's genuine

[xoxoxoBruce]

But how do you get a continuous blade, with two red tips, and no red nose cone in the middle?

[Gravdigr]

Originally Posted by Wombat

I can't see any parts of the prop that don't exist, so I'm not sure what you are referring to. To me, every part of the picture looks consistent with a focal-plane shutter exposure of a moving object. Yes it is weird, but I think it's genuine

I was talking more or less about the part of the prop that bolts to the hub. Where do the hub flanges disappear to, and where does the section of prop that magically appears to connect two seperate sections of prop where there should be hub flanges (for lack of the correct term) appear from?

And, to clarify, I'm not saying the pix are actually photoshopped. (I just thought the bs flag was cool) Just perpetuating the oft repeated cellar mantra. I've seen these type pix before, I just can't wrap my fragile little mind around the idea.

[glatt]

Originally Posted by Knight f3

a guy had modified a flatbed scanner to work as a digital camera and he would get similar weirdness in his photos of moving objects.

That would be Matthias Wandel. He amazes me with the stuff he invents.