explain photos on Flickr

Explaining the Differences by Marissa Priddis

It turned out well!

1

linuxgazette.berlios.de/111/pramode.html

School Visit--After getting permission from the classroom teacher, we talked with the school children, shared gifts with them and spent some time getting to know them.

HS Explainers training by Tinkering Studio

Marble Machines on 1/28/18

vortex_explained by Michael Zuraw

I've been asked a few time to explain why there is a vortex in many of the "blurry" photos I've taken from cars. The above diagram I hope helps explain this.

Assume I'm holding the blue camera in my car in the left most image (my wife is driving, not me). I see the interesting patch of stars on the side of the road and center my camera's viewfinder on the yellow star. With a the shutter speed set at 1/5s, I press the shutter release and rotate the camera so that it stays centered on the yellow star. At the end of the 1/5s, the camera is now pointed as in the middle diagram. You can now see that as the viewpoint has changed, the other stars around the yellow star appear to have moved in a counter clockwise direction around the yellow star. Since the shutter is open the whole time, you'll see a circular blur around the center star.

Using trigonometry, you can calculate just how many degrees you need to rotate the camera to keep a point at a given distance at a particular speed fixed in the center of the image. As should be obvious, the faster you go, the faster you need to rotate the camera, and the closer to the vehicle, the faster you need to rotate the camera.

Holding the camera steady pointed 90 degrees fromt the direction of travel while taking the photo is the equivalent of fixing the camera on a point at infinity, so you'll get straight lines of blur across the image. If you move the camera much faster than required to keep a point in the image in the center, you'll get lines of blur representing only the left half of the vortex. These lines can become a near vertical blur in the image. And, although I haven't tried this yet intentionally, if you rotate the camera in the direction of travel, you should get only the left side of the vortex.

If you are really good and fast (or can use longer shutter speeds), you should be able to get multiple vortexes by varying the panning speed and direction. I see hints of this in many of my photos, but I can't say I really tried to do this intentionally yet.

A few hints to make it easier for you to get good results. 1. Use manual focus, if you wait for the auto focus to focus you'll miss the shot. 2. Start panning before you hit the shutter release. With an SLR, you won't see anything in the view finder when the picture is being taken, so you'll need to just continue panning at the same speed. 3. Find someone else to drive.

Explainer Halloween 2012 by NySci Explainers

Photos by Michael Wilson

Explaining by Hemakumar Sarangapani

Explaining

Explaining stuff by JJ Merelo

Explaining the christmastree by katontour

- Pic by JK by Nebagamon Oktoberfest 2009

Bud Herzog explaining to Brian Kramer why he should have his knees removed. Listening intently, Katy wonders why she would have gotten all excited and come to a yawning festival.

Horemheb explain by Beth Camp

OLYMPUS DIGITAL CAMERA

Explaining... by Amy B

or Kung Fu, you decide :)

Union soldier explains by a@k

Explaining Camel Rights by Jillian C. York

Explaining by dee

dd-wrt Advanved Routing "OLSR Router" by W__________

Optimized Link State Routing

Explaination of the parameters:

github.com/mirror/dd-wrt/blob/master/src/router/olsrd/fil...

Poll Rat 0.1

Polling rate for OLSR sockets in seconds

Fisheye mechanism for TCs (0 meansoff, 1 means on) (default is 1):

en.wikipedia.org/wiki/Fisheye_State_Routing

MprCoverage 7

TcRedundancy 2

LinkQualityLevel 2

Explaining, with lego by Joel Höglund

explain by 辉文甘

Explaining to Mum by eoghan1973

Matt explains by Eric Rosenbaum

Explaining by Alex says Ab Bahut Sundar Ho

at mum's birthday party

Explain by Justin

I was the cinematographer for a short film that took place along the central California coast and brought along my Olympus OM-G for myself.

This here is James. He was our sound mixer and boom operator for the short. He was a pretty cool guy and I took this when we broke for lunch. I converted it to black and white because the fog in the background adds a level of emotion to the shoot which I really love.

Fuji Superia 200.

2013 Field Trip explainer training by Tinkering Studio