I have talked a lot about learning as much about my equipment as possible before investing in something new or additional for the studio. I almost did not take my own advise. Let me tell you a story.
I have become “lazy” in the digital part of photography by letting my camera suggest the proper exposure time for a photo. I usually shoot in manual mode with my Canon Rebel xTi, but I have only used half of the capabilities given to me in manual mode.
Just yesterday as I was on an errand, I looked into the sky to see some of the most beautiful clouds back-lit by the sun. So I got my camera, made sure my settings were proper for shooting into the sun. Raising my camera to my eye and observing the metering, it showed that the photo would have been much to over-exposed for the style of shot I was seeking, so I forgot the meter and raised my shutter speed to 1/50 of a second. Then as the instinctive digital photographer I am, I looked at the LCD screen to see how the shot came out. *Fail Buzzer*
I have wanted to distance myself from these “fail-safe” practices by pursuing extensive education in film photography. I wanted to know what the conditions for a shot around me were as well as knowing how to manipulate the camera settings to get the best shot for style, exposure or journalism.
So I began asking myself, why I thought film would help me accomplish this goal. My answer came to this: “Film is 1 set quality of ISO per roll.” Thus the ISO cannot be easily changed without risking the exposed film.
Guess what? I can start this training by setting my digital camera ISO and refrain from changing it. This will give me only the options to change shutter speed and aperture to best suit my shooting preferences. While this will not keep me from watching the camera meter I can accomplish my goal in maintaining a certain ISO quality and working with more effective resources.
The Correlation Of Physical Human Vision And Photography Camera truly makes a lot of sense when the purpose of each part is clearly explained!
As we have studied in the last two blog posts (Camera Troubles & Camera Troubles – Part 2) the camera Lens is comparable to our Cornea, Iris and Pupil. The Lens glass is designed to focus and adjust for telephoto. The camera Lens is comprised of at-least two pieces of glass (I say “at-least” because there are “Prime Focal Lenses” and “Variable Distance Lenses” which we call “Zoom lenses”.), the first being the lens we can see and should refrain from touching; the second being capable of moving microscopic distances for the purpose of focusing.
Perhaps this is a bit more theory than anyone would choose to know. Although I would not be writing this series of posts if I did not believe this information would benefit you as you daily take joy in photographing your life and the wonderful moments with your loved ones.
In side the camera Lens is the Diaphragm adjusted in stops which we photographers call “f/stop” or “Aperture”. The solid and flat construction of the Diaphragm is a little hard to explain, but let me tell you about its purpose; it is designed to adjust the opening in small amounts to regulate the saturation of light to reach the Sensor. This is the same purpose that our Iris serves by regulating the size of our Pupil and allowing just the right amount of light to pass onto our Retina.
The camera’s Sensor is a sensitive piece of equipment because it is made to be able to see things in relatively low lit situations. In fact I would say that the Sensor is the most delicate pieces of a camera when subjected to light. If anyone remembers the days of film photography, the Sensor in our digital cameras are the modern replacement of film. Do you remember looking for the right “film speed” and handling one film set after another? Oh the questions I had; and the answers I received were such an education! The camera Sensor and its inspiration our Retina (even the original film) are designed to be sensitive to light, leaving temporary impressions to be received into our memory.
There is a notable difference between our Eye and a camera’s Sensor system. The difference is this, Our Eye sees things in continuous motion and high rates of speed (something along the lines of video), whereas the camera is designed to see things as individual momentary pieces of halted time.
This is a lot of fun to discover new things about our camera! There is more to discover about the camera and some specifics as to how we can get the best out of them. Stay focused; we will capture some more details later this week!