Photography Tutorial: Shutter Speed & Motion

Canon EOS Rebel T3i digital SLR camera. Picture from retx.net.

I recently made the exciting purchase of a Canon EOS Rebel T3i digital SLR camera!  As I learn to master it, I'll share with you the lessons I learn, just as I share with you my lessons in digital art.

This first photography tutorial is on the concept of shutter speed.

Part 1: What is shutter speed?

Have you ever seen a photo of a fountain or waterfall, where the water was smooth and blurred?  Or a photo of a city scene where the cars seemed to streak by in a blur of motion?  (See examples below.)

Smooth, blurred waterfall

From Waterfall by ~xPhate on deviantART

Blur motion

From digital-photography-school.com

Blur motion

From smashingmagazine.com

Or, on the flip side, have you ever seen a photo where a moving subject is frozen mid-action, and water may appear as individual droplets, rather than a smooth blur?  (See examples below.)

Frozen action shot

From boston.com

Frozen action shot

From cruzine.com

Well, those pictures don't just happen!  They involve a photographer intentionally changing settings on his or her camera to make the image either blurred, or frozen in time.  The settings that will effect this are called the shutter speed.

Shutter speed is the speed at which photo is taken.  For example, a shutter speed of 1/30 means that the photograph was snapped in one-thirtieth of a second.  The faster the shutter speed, the clearer and more "frozen" the image will appear; the slower the shutter speed, the smoother and more blurred the image will appear. 

Shutter speed chart 

From miketurner-photography.co.uk

Think about it this way: If a photograph is taken at a fast shutter speed (1/100, for example), then the image is being recorded for one-one-hundredth of a second; it is only recording what happened in that extremely brief fraction of a second.  It makes sense that that would yield a crisp, frozen photograph.  

Alternatively, if a photograph is taken at a slow shutter speed (2 seconds, for example), then the image is being recorded for that much time; it captures all the movement that takes place in that period.  The result is a blur. 

The differences between fast and slow shutter speeds

From exposureguide.com

From digicamhelp.com

Part 2: How to change shutter speed

The way to change shutter speed on a Canon DSLR is by turning the Mode Dial to "TV" mode.

You can then change the shutter speed by turning the Main Dial, right behind the shutter button.  The changing shutter speed will display on the LCD monitor.

Part 3: Applying what we learned

You may be wondering: How fast or how slow should the shutter speed be?  The answer is... it depends!  While the chart above from Mike Turner Photography is definitely helpful, I will still say that the selection of shutter speed completely depends on what the photographer wants (do you want it to be frozen or blurred?), and on the setting and situation.  Experiment and see what you discover!

To illustrate the concepts of this tutorial further, here are some photos I took while experimenting with shutter speed for the first time. 

Fish tank bubbles

 

Notice how, as the shutter speed gets faster, the images get darker.  This is because the shutter inside the camera is opening and closing faster, which allows less light to enter the camera.  I believe the darkening effect of faster shutter speeds is counterbalanced by adjusting ISO, but that's a skill I still haven't learned, and it would be a topic for another tutorial!

Fireworks

I took these photos this Independence Day!  This first photo was taken with a really fast shutter speed (somewhere in the league of 1/200; I don't remember the exact number), causing the firework fountain's sparks to appear as individual particles, like bits of snow or dust.  Note also the light-sabers in the back that my brothers were swinging around, but do not look blurred.

Next I took pictures with a really slow shutter speed (again, I don't remember the exact number, but it must have been somewhere between 1/10 and 1"), and I had these fun, fountain looks.

Note how blurred the light-sabers are now!

Returning to a normal shutter speed (somewhere between 1/30 and 1/80) rendered an image that looks more like what we see with our eyes when watching a firework.

Conclusion

There are a lot of things you can do with shutter speed... go have fun with it!  Then, come back here for more photography tutorials, coming soon... and leave a comment about what you've been able to do with shutter speed.

Play safe and have a Happy Independence Day!

True beauty and the ethics of Photoshop

I find it fascinating how fake the models are that we see in magazines and ads.  Most models look like ordinary people before the makeup, lighting, and particularly the Photoshop adjustments, transform them into these artificial and flawless... what shall we call them?  Gods and goddesses?  Angels?  Aliens?  Whatever they are, they are not natural and they are not real.  Here are a few examples I pulled from www.hemmy.net:

(The original image is first; the Photoshop image is shown after.)

Is it just me, or do these pictures make you feel sick?  In each of these cases, I think the original model is physically attractive.  None of these photo edits make sense to me, with the exception of the blemish that was removed in the second picture (with a blemish that obvious, I think I'd remove it, too!).

And yet, it is these edited, counterfeit pictures of models that so many people -- girls and women in particular -- subconsciously look up to as standards for attractiveness and beauty.  According to a study in 2004, only 2% of women think they are beautiful (www.dove.co.uk).  This is a shockingly low number, but should it really be surprising, with the repulsive way beauty has been contorted by our media?

"I wish I looked like such-and-such an actress!" a woman may moan.  But I would plead in response:  "Please understand that you probably do!!"

If you haven't seen Dove's video "Evolution", you need to.  This is another excellent glimpse into the phony world of modeling:



Now, don't misunderstand me: I am not necessarily opposed to editing photos.  I've done it myself on a small scale.  I understand; sometimes the lighting of our photos isn't good.  Sometimes models wake up on photo day with big zits on their foreheads (GACK!!).  That isn't what I'm talking about.

What I am talking about is morphing someone into an unnatural, impossible non-human that no person could ever physically rival in real life.  I'm talking about making aliens into our standard for beauty.  I mean, you might as well make this our standard for beauty (I am talking about the left half of the picture, of course):

By the way, I have no idea what this book is about, I'm not endorsing it, and I couldn't tell you if it was extremely inappropriate or terribly written. I'm just borrowing the cover to emphasize my point... 

As computer artists, we have these questions to ask ourselves:  What is most important or valuable, as we make our computer art, or edit our photos?  What is our highest priority in this matter?  What should be our highest priority?  What power do we wield, as computer artists and culture influencers, and what are we personally doing with that power?  Let me be more specific:  Are we doing more harm or more good with that power?  And if we are doing more harm... what should we do differently so we are doing more good?

What do you think?