Wednesday, February 23, 2011

Joana's 2 Cents about Photography & Basic Photo Tips: Aperture, Shutter Speed, and ISO by Bryan F Peterson

I'm often asked about information related to photography such as DSLRs, what to purchase, settings, training, websites, tips and such. I have been offering advice from a combination of what I know, and what I have learned. I feel as an artist, we are always learning and growing, and I love to share with others ;) 

Truly, starting out with the best shot possible "in-the-camera" is key, which is the reason why a BASIC black and white photography FILM class would be essential to truly grasp the meaning of the basics of photography such as exposure, camera settings, composition, lighting, developing... etc. This will offer you the knowledge and ability to understand what digital editing does and what it can do for your digital photos, and how you can LESSEN your EDITING with learning how to get the shot that you want... the first time. For most, a film photography class is not feasible, but it is highly recommended if you are able to get your hands on a film SLR camera.

What is a DSLR anyway?? A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that uses a mechanical mirror system and pentaprism to direct light from the lens to an optical viewfinder on the back of the camera.

For most, the automatic setting on a DSLR camera is very sophisticated nowadays, but when you know that you can get a better photograph, but have the lack of skill, it is very frustrating!! I found myself in this situation, and I am still learning! But, I practice practically every day and learn more by just working with the knowledge that I have and continue to consult with others who have been successful at achieving GREAT results.

My endeavor is to encourage others to explore things of interest. Find what you are most fond of and shoot it!! It is so wonderful to capture this same subject at all hours of the day and truly learn what elements work and which do not. With digital technology, it is simple to just peek at the results and vary the settings to improve. And best of all, delete those that you do not want. But to truly learn, you need to go out and PRACTICE!! 

Also, if you are interested in learning more, there are many free webinars online and tutorials. I'm sure if there is something specific that you would like to learn, you can find almost anything on www.youtube.com these days :) Another great resource for information is www.dpreview.com where they have compared many cameras and have full reviews for all that are on the market, and trends for what to expect if you are not yet ready to purchase. If you would like to take classes, www.digitalphotoacademy.com is an awesome place to sign up!! There are all types of classes in different locations that will help you with improving your photography!!

These resources have been the strong influential forces that have helped me with my career in photography. I invite you to share in your methods as well since this is an interactive blog. I would love to learn about other resources that you have found handy in helping you as well. 

Interestingly, I have found my niche in photography by accident. I have a fine art, graphics, and advertising background. I had not taken any photography classes since my black and white photography class in high school. But, my interest in beauty never stopped me from shooting everything that I could with my first point and shoot digital camera. I was amazed by the results and interest of my photos, that I was sure a DSLR was for me!! 

Remember that your vision, your perception, your experiences...etc, they are all unique. Those are the very things that are interesting!! As an artist, I see it as our way to express ourselves... and enjoy at the same time. Often, people say that I have a good eye. It is interesting to me, since most of the time when I shoot, it is not my eyes that deserve all the credit... there is much heart and soul that go into it, so much emotion and feeling and awe, that I often claim that I “feel it”, rather than “see it.” I believe that this very emotion is captured in our photos.

The depth in which we feel, our unique ability and connection of our outlook in life is so important. It is therapeutic for me to shoot. I hope you find the same psychological, physiological, emotional, physical HIGH that comes with photography. Behind every shot, there is a story... what is yours??

Such as a blind person can defend him/herself, we have this amazing energy within us that is powerful if we just decide to trust and believe in ourselves!! A photographer is an artist. Like a brush for a painter, an instrument for a musician, the angelic voice of a singer, we all need to feel, project, grow, thrive... FEEL the magic of when it is just right. Our camera is not our only tool. We have so much from within that we need to shine!! We need to see the world and people around us as blessings to have made us who we are today, and we just use our cameras as the tool in which to chronicalize our lives, our passion, our experiences... our expression. So, as with many, I am still learning as I go along my photographic journey… and enjoying every step of the way. Make your path, and continue to explore!!

My friends, I have searched for a simplistic article to help you get started, or continue on, with your exciting photo journey. I finally found one an explanation of the basic camera settings and techniques that is easy to read and follow, and explains all of the basics that you need to get started or perhaps improve with your photography. Please let me know how you like this article. 

I encourage you to go out and start shooting and please inform me of your results!! The worst thing is not to get discouraged. I have seen much improvement with many of my photography friends. We often encourage each other and it is so uplifting and just plain wonderful to have this ability to share with each other in such an amazing way.

If photography is your passion, run with it... (or shoot with it!). Everyone needs to start somewhere, and most professional photographers have a specialty. So no need to put pressure on yourself if your landscape shots are far from Ansel Adams!! You will get there... just use that drive and energy to continue to practice, learn, and improve, and just have fun. Cheers and best wishes... enjoy this GREAT article!! And most of all… do not forget to put on your “VACATION EYES” today (and every day)!!!





Basic Photo Tips: Aperture, Shutter Speed, and ISO

Just as it was 100 years ago and just as it is today, every camera—be it film or digital—is nothing more than a lightproof box with a lens at one end and light sensitive film or a digital sensor at the other end. It is of course light that enters through a ‘hole’ in the lens (the aperture), and after a certain amount of time (determined by shutter speed) an image will be recorded (on film or digital media). This recorded image has been called—since day one—an exposure, and it still is.
Sometimes, the word exposure refers to a finished slide or print: “Wow, that’s a nice exposure!” At other times, it refers to the film or digital card: “I’ve only got a few exposures left.” But more often than not, the word exposure refers to the amount, and act, of light falling on photosensitive material (either the film or digital sensor). And in this context, it comes up most often as part of a question—a question I’ve heard more often than any other: “Hey Bryan, what should my exposure be?” And my answer is always the same: “Your exposure should be correct!”
Although my answer appears to be flippant, it really is the answer. A correct exposure really is what every amateur and professionalalike hopes to accomplish with either his or her camera. Up until about 1975, before many auto exposure cameras arrived on the scene, every photographer had to choose both an aperture and shutter speed that, when correct, would record a correct exposure. The choices in aperture and shutter speed were directly influenced by the film’s ISO (speed or sensitivity to light). Most photographers’ exposures would be based on the available natural light. And when the available light wasn’t enough, they’d resort to using flash or a tripod.

The Do-it-all Setting

Today, most cameras, either film or digital, are equipped with so much automation they promise to do it all for you, allowing photographers to concentrate solely on what they wish to capture. “Just keep this dial here set to P and fire away! The camera will do everything else,” says the enthusiastic salesman at the camera shop. Oh, if that were only true! Chances are that most—if not all—of you who are reading this article have a do-it-all-for-you camera, yet you still find yourself befuddled, confused, and frustrated by exposure. Why is that? It’s because your do-it-all-for-you camera is not living up to that promise, and/or you have finally reached the point at which you want to consistently record creatively correct exposures.
The do-it-all camera often falls short of its promise, yielding disappointing results. Use your camera’s manual settings, or at the very least, know how light and shadow interact on film or digital media so that you can be assured of getting it right even when you are in auto exposure mode

Setting and Using Your Camera on Manual Exposure

I know of no other way to consistently make correct exposures than to learn how to shoot a fully manual exposure. Once you’ve learned how to shoot in manual exposure mode (it’s really terribly easy), you’ll better understand the outcome of your exposures when you choose to shoot in semi- or full auto exposure mode.
With your camera and lens in front of you, set your camera dial to M for manual. (If you’re unsure on how to set your camera to manual exposure mode, read the camera manual!) Grab your kid or a friend to use as your subject and go to a shady part of your yard or a neighborhood park, or if it’s an overcast day, anywhere in the yard or park will do. Regardless of your camera, and regardless of what lens you’re using, set your camera dial to M Mode and the lens opening to the number 5.6 (f/5.6). Place your subject up against the house or some six- to eight-foot shrubbery. Now, look through the viewfinder and focus on your subject. Adjust your shutter speed until the camera’s light meter indicates a “correct” exposure in your viewfinder and take the photograph. You’ve just made a manual correct exposure!
Operating in manual exposure mode is empowering, so make a note of this memorable day.

The Photographic Triangle

This does not mean that I want you to forever leave your camera’s aperture at f/5.6 and simply adjust your shutter speed for the light falling on your subject until the viewfinder indicates a correct exposure. Before you forge ahead with your newfound ease in setting a manual exposure, you need to learn some basic concepts about exposure.
A correct exposure is a simple combination of three important factors: aperture, shutter speed, and ISO. Since the beginning of photography, these same three factors have always been at the heart of every exposure, whether that exposure was correct or not, and they still are today—even if you’re using a digital camera. I refer to them as the photographic triangle.
Locate the button, wheel, or dial on your camera or lens that controls the aperture. If you’re using an older camera and lens, the aperture control is a ring that you turn on the lens itself. Whether you push buttons, turn a wheel, or rotate a ring on the lens, you’ll see a series of numbers coming up in the viewfinder or on the lens itself. Of all of the numbers you’ll see, take note of 4, 5.6, 8, 11, 16, and maybe even a 22. (If you’re shooting with a fixed-zoom-lens digital camera, you may find that your apertures don’t go past 8 or maybe 11). Each one of these numbers corresponds to a specific opening in your lens and these openings are called f-stops. In photographic terms, the 4 is called f/4, the 5.6 is f/5.6, and so on. The primary function of these lens openings is to control the volume of light that reaches the film or digital media during an exposure. The smaller the f-stop number, the larger the lens opening; the larger the f-stop, the smaller the lens opening.
For the technical minded out there, an f-stop is a fraction that indicates the diameter of the aperture. The f stands for the focal length of the lens, the slash (/) means divided by, and the number represents the stop in use. For example, if you were shooting with a 50mm lens set at an aperture of f/1.4, the diameter of the actual lens opening would be 35.7mm. Here, 50 (lens focal length) divided by 1.4 (stop) equals 35.7 (diameter of lens opening). Whew! It makes my head spin just thinking about all that. Thank goodness this has very little, if anything, to do with achieving a correct exposure.

Aperture

Interestingly enough, each time you descend from one aperture opening to the next, or stop down, such as from f/4 to f/5.6, the amount of light passing through the lens is cut in half. Likewise, if you change from an aperture opening of f/11 to f/8, the volume of light entering the lens doubles. Each halving or doubling of light is referred to as a full stop. This is important to note since many cameras today offer not only full stops, but also the ability to set the aperture to one-third stops, i.e. 
f/4
, f/4.5, f/5, f/5.6, f/6.3, f/7.1, f/8, f/9, f/10, f/11, and so on. (The underlined numbers represent the original, basic stops while the others are the newer one-third options sometimes available).

Shutter Speed

Now let’s turn to shutter speed. Depending on the make and model, your camera may offer shutter speeds from a blazingly fast 1/8000s all the way down to 30 seconds. The shutter speed controls the amount of time that the volume of light coming through the lens (determined by the aperture) is allowed to stay on the film or digital media in the camera. The same halving and doubling principle that applies to aperture also applies to shutter speed.
Let me explain. Set the shutter speed control on your camera to 500. This number denotes a fraction—500 represents 1/500 second. Now change from 500 to 250; again, this represents 1/250s. From 1/250s you go to 1/125, 1/60, 1/30, 1/15, and so on. Whether you change from 1/30s to 1/60s (decreasing the time the light stays on the film/digital media) or from 1/60s to 1/30s (increasing the time the light stays on the film/digital media), you’ve shifted a full stop. Again this is important to note since many cameras today also offer the ability to set the shutter speed to one-third stops: 
1/500s
, 1/400s, 1/320s, 1/250s, 1/200s, 1/160s,1/125s, 1/100s, 1/80s, 1/60s, and so on. (Again, the underlined numbers represent the original, basic stops while the others are the newer one-third options sometimes available). Cameras that offer one-third stops reflect the camera industry’s attempts to make it easier for you to achieve “perfect” exposures. But as you’ll learn later on, it’s rare that one always wants a perfect exposure.

ISO

The final leg of the triangle is ISO. Whether you shoot with film or use a digital camera, your choice ofISO has a direct impact on the combination of apertures and shutter speeds you can use.. To better understand the effect of ISO on exposure, think of the ISO as a worker bee. If my camera is set for ISO 100, I have, in effect, 100 worker bees; and if your camera is set for ISO 200, you have 200 worker bees. The job of these worker bees is to gather the light that comes through the lens and make an image. If both of us set our lenses at the same aperture of f/5.6—meaning that the same volume of light will be coming through our lenses—who will record the image the quickest, you or me? You will, since you have twice as many worker bees at ISO 200 than I do at ISO 100.

ISO and Shutter Speed

How does this relate to shutter speed? Let’s assume the photo in question is of a lone flower taken on an overcast day. Remember that your camera is set to ISO 200 and mine to ISO 100, both with an aperture of f/5.6. So, when you adjust your shutter speed for a correct exposure, 1/250s is indicated as “correct,” but when I adjust my shutter speed for a correct exposure, 1/125s—a longer exposure—is indicated. This is because your 200 worker bees need only half as much time as my 100 worker bees to make the image.

Understanding Exposure

Since this is such an important part of understanding exposure, I want you to pause in your reading for a moment and get out your camera, as well as a pen and paper. Set the film speed dial to ISO 200; (If you are a film shooter, do this even if you have a roll of film in your film camera that is not ISO 200, but don’t forget to set theISO back to the correct number when we’re done here.) Now, set your aperture opening to f/8, and with the camera pointed at something that’s well illuminated, adjust your shutter speed until a correct exposure is indicated in the viewfinder. (If you want, you can leave the camera in the automatic aperture-priority mode for this exercise, too). Write down that shutter speed. Then, change your film speed again, this time to ISO 400, leaving the aperture at f/8, and once again point the camera at the same subject. Whether you’re in manual mode or auto-aperture-priority mode, you’ll see that your light meter is indicating a different shutter speed for a correct exposure. Once again, write down this shutter speed. And finally, change theISO to 800, and repeat the steps above.
What have you noticed? When you change from ISO 100 to ISO 200 your shutter speed changed: from 1/125s to 1/250s or perhaps something like from 1/160s to 1/320s. These shutter speeds are examples, of course, and not knowing what your subject was, it’s difficult at best to determine your actual shutter speeds, but one thing is certain: each shutter speed is close to if not exactly half as much as the one before it.
When you increase the number of worker bees (the ISO) from 100 to 200, you cut the time necessary to get the job done in half. (If only the real world worked like that!) This is what your shutter speed was telling you: Going from 1/125s to 1/250s is half as long an exposure time. When you set the ISO to 400, you went from 1/125s—passing by 1/250s—and ended up at 1/500s. Just as each halving of the shutter speed is called 1 stop, each change from ISO 100 to ISO 200 to ISO 400 is considered a 1-stop increase (an increase of worker bees).
You can do this same exercise just as easily by leaving the shutter speed constant, for instance at 1/125s, and adjusting the aperture until a correct exposure is indicated in the viewfinder; or, if you choose to stay in auto exposure mode, select shutter-priority, set a shutter speed of 1/125s, and the camera will set the correct aperture for you.
Now that you are armed with this simple yet invaluable information, let’s put it towards some truly creative uses! The next article from Bryan will explain in detail how to correctly expose yourphotographs.

More

About the Author


Bryan F Peterson has been a full-time commercial photographer since 1981, shooting assignments all over the world for many of the Fortune 500 companies, including Kodak, UPS, and American Express. He is also a contract stock photographer for Corbis and Getty. He has been a contributing editor at Outdoor Photographer Magazine and is currently a contributing editor at Popular Photography and Imaging Magazine. Within the photographic community, he is most noted as the author/photographer of four best selling “how-to” photography books: Understanding ExposureUnderstanding Shutter SpeedLearning to See Creatively and Beyond Portraits, with two new books due out in the spring of 2009: Understanding Close-up Photography and The Field Guide to Photography. He is also the founder and one of the instructors at Picture Perfect School of Photography, an on-line photography school. More »



Example Images from Bryan’s Gallery


Text ©2008 Bryan F Peterson. Photos ©2008 Bryan F Peterson.
Article created August 2008

Readers' Comments




Master Faster , August 20, 2008; 05:08 P.M.
A very good and simple explanation on the basics. I'm a beginner, in DSLR age, but used to shoot RFs in manual mode before. About the article, my wish list would include types of metering , that would help really more...MF
Michael Evans , August 20, 2008; 11:55 P.M.
Good information. Thanks for taking the time to make some things easily understandable. I like to reread articles to to refresh knowledge.
Tim Summa , August 21, 2008; 10:09 P.M.
Bryan, excellent presentation on the basics of photography; you are doing a vary fine job of presenting solid information, keep this up. It is a delight that a person can understand these things, organize them into a neat package and then deliver them clearly and concisely. The humor of the worker bees approach was nice, it reminded me of a pre WWII article from Eastman Kodak using little men as working to ‘expose’ by building an image of the scene on a piece of film. Good humor in education helps to both illustrate and act as a memory minder. Tim Summa MFA
Victor Wei , August 22, 2008; 12:38 P.M.
Great tips - I find the advice on how to shoot with manual settings particularly helpful for beginners who may feel shooting manually intimidating. Thank you, photo.net, for bringing Bryan in for us.
Ronda Sliter , August 23, 2008; 02:13 P.M.
I am a beginner, and these tips are easy to understand. I will refer to this article a lot until its committed to memory. Thank you!
Paul Trunfio , August 24, 2008; 04:29 A.M.
Great for a beginner. But Bryan left out a lot of details for trickier exposures (like dark or light backgrounds, shooting the sky with the sun in the frame, motion, isolation, etc) that I hope he will get to someday. If you cannot wait, all this and more can be found in his "Understanding Exposure" book. The first edition was published in 1990 and, as a beginner then, it was an indispensable learning tool for me and my fully manual film camera. Lots of techniques, without all the fluff (i.e., concise). A beginner cannot learn from anyone better. Welcome to photo.net.
Rick Ogan , August 24, 2008; 11:41 A.M.
This is great stuff as I am new to Digital SLR's and has been many years since someone needed all of my film camera's and lense's more than I did. Keep this up I love it. Thanks
Nick Mc , August 31, 2008; 02:09 P.M.
Great article. I only skimmed it so I may have missed this detail, but I did not see an explanation of the consequences of high ISOs. This is very important for beginners to know, otherwise many may think that the higher the ISO the better the picture in any situation.
R. A. Haentzler, September 16, 2008; 04:55 P.M.
I have read 3 of Bryan's books and have found them not only informative but very well written. His passion comes through with each paragraph. In my opinion he has a way of simplifying the art of taking pictures or should I say taking creatively correct exposures. I am looking forward to his two future books that are coming out. -Bob Haentzler, Waterloo IL
omid semiari , September 29, 2008; 02:37 P.M.
Thank you Bryan for your comprehensible article. since I'm a new comer on DSLR, it was really helpful. I'd wait for your piece of advices for the first steps on photography that should be taken. thank u again . omid
Thomas Alanoly , December 03, 2008; 05:21 A.M.
Bryan did it as simple as breast-feeding a newborn, speaking their language ! Wholesome and easily digestible.
Roberto Anil , December 19, 2008; 09:21 A.M.
Fantastic explanation in a very simple way. Thanks
Paul Kerr , February 02, 2009; 12:17 P.M.
The clearest description I have had the pleasure to read on these essentials. VERY helpful to a newbie such as myself.
Monique B , April 05, 2009; 07:30 P.M.
LOL....finally I understand my camera....woo hoo! Think I just had one of those light bulb moments! Thanks so much for this article.
Gabriel Hughes , September 27, 2009; 03:41 P.M.
At LAST, even I could grasp this tutorial, now I can let my creative side go wild:) Thanks
Sharon Johnson , December 17, 2009; 04:09 P.M.
Good article. A lot of discussions I've seen on this site ( and others ) only talk about aperture and shutter speed when trying to diagnose someone's exposure problems. It seems like they've never heard of ISO. I used to search far and wide for Kodachrome 25. Kodachrome 64 was acceptable, but 100 was only if you were desperate. Now with a DSLR I've had to raise my acceptability limits quite a bit, but ISO problems can still surface ( think "noise" has been substituted for "graininess" ).
David Thewlis , December 30, 2009; 03:23 A.M.
Great explanation! I also found playing around with the values on this page really helped me a lot: http://www.photonhead.com/beginners/stops.php
Amber Shaffer , January 19, 2010; 07:17 P.M.
This was very interesting and helpful. It refreshed my memory of all the things i learned in photo one a year and a half ago. Since then, I have gotten more and more into photography. Thanks for the refresher!
Nick Gonzales , April 14, 2010; 01:55 P.M.
This was excellent. You put it into such easy terms a kid could understand this.. Just one suggestion.. Cut your hair dude..
J John , May 12, 2010; 01:08 P.M.
This couldnt have been explained in a better way. I wish I could retain everything in my head as I shoot pictures. Will keep coming back to this page to refer. Thanks for the great work you professionals are doing to educate the rest.
Amy Thompson , September 20, 2010; 07:40 P.M.
I did this practice with my Canon EOS Rebel T1i, and I believe I understand emotional (for a lack of a better word) how to relate the aperature with the shutter speed, I love the difference when I adjusted the shutter speed for black and white in the manual mode, but I am having difficulty understanding why i would need to bump up the ISO.  Does it clarify the objects in the photo more?  Does the ISO give more definition while the aperature and the shutter speed allow the light to soften it otherwise?  I think I am a bit confused....sorry only had my camera for about a year...still learning.
Charles Owen Hoffman Smith , October 02, 2010; 01:11 A.M.
    Bryan I have attended two photo courses run by the same guy here in my home town and in neither case did he explain the basics as well as your article. I look forward to reading more. Thank you it has helped a great deal, Charlesowen





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