Surprisingly it's still the first of the month and your September 2015 deskop calendar is ready for pick up. Enjoy this last glimpse of Summer as the season wanes. The picture is from a trip to Ocean City Maryland a few years ago. Please share is whit whomever you wish.
High resolution download is available here: September 2015
September 2015
Last week I wrote about the difficulty of capturing the enormous dynamic range of a sunrise. In case you missed it click here. At the end of the article I mentioned another way to recreate this daily celestial event through photography, H.D.R. or High Dynamic Range photography. If you’re going to process images through a program that uses this technology, you have to do a little planning before you take the picture with your camera. The key to the whole process is that multiple pictures are taken of the same scene at different exposure settings. The darkest image needs to be dark enough so that the brightest part of the picture is not pure white. When a sunrise is the focus of the picture this spot is normally the Sun. The brightest image needs to be light enough so that the darkest part of the picture is not pure black. This is so that during post processing there is color information throughout the picture. Effectively the dynamic range of the picture is compressed to accurately reproduce what the eye perceived but the camera was incapable of recording. This photograph was processed using Nik (Google’s) HDX Efex Pro 2. I took nine images. Here are the darkest and lightest:
After the magic of the HDR program we have this:
And here’s the finished image after a few touch ups in Photoshop.
Many mornings we are greeted with a wonderful light show as the Sun sprays its light across the ever spinning Earth. The infinite variety of variables assures each day of its individuality. The position of the Sun, the season, the atmospheric content, water vapor, clouds, etc. wow us with a universal symbol of rebirth each dawn. Creating a good photograph of this celestial event can be challenging.
Watching a sunrise evokes different emotions within each of us, conveying them from the moment they occurred to a canvas that can raise them from your memory in the future is the greatest part of the challenge.
A little biology about our ocular sense; our eyes can see a great amount of contrast between light and dark. In photography the amount of light is measured in f-stops. The human eye can see about twenty f-stops of light, which means if you can picture the blackest black in a dark room, and compare it to a brightly lit glowing white object on a sunny day, this is the complete contrast scale that we can perceive. Divide that into 20 sections of brightness levels and you have our f-stop range of seeable light. Here’s the photography problem: modern cameras can capture between five and six stops of light. Often, this isn’t a problem. Think about a cloudy day. The difference between bright objects and dark objects isn’t that great so a camera’s job is pretty easy. But something like a sunrise, which has a very bright glowing ball of fire in the scene and other objects which have very little illumination because their backs are towards the Sun and are very dark makes a photographer’s job more difficult.
One way of dealing with this huge contrast problem is to rely on the awesomeness of your camera’s sensor and adjust the photograph is using an editing program such as Adobe Lightroom or Photoshop. One advantage of this method is that I can freeze objects in motion with a fast shutter speed. A few of the drawbacks are that the aperture (opening of the lens) must be very wide to capture as much light as possible very quickly which limits the depth of field (think depth of focus) of the image. This is acceptable usually with a sunrise because the clouds in the distance don’t need to be crisp and sharp, after all, they are clouds. Another drawback is that to capture an image at a fast shutter speed the ISO or sensitivity of the camera’s sensor needs to be increased, which increases the amount of noise in the picture. With these limitations, post production becomes very important in photography.
In the photograph below I wanted to show the Sun rising over the ocean with the light being dappled along the crisp spray and the tops of the incoming surf. Shutter speed was 1/1000 of a second to freeze the motion of the spray. Aperture was at f/5.6 to let in a lot of light but to keep the whole wave in focus. ISO was set to 800 so the camera sensor could soak up the light quickly.
Next time we’ll take a look at another way to create a special sunrise picture, High Dynamic Range photography.
The second day of our shore trip greeted me with rain and overcast skies, just like I had last year. Realizing this I headed down to the Ocean City Inlet where a pier extends into the Atlantic. The dark clouds assured me there would be no sunrise this morning, so I would need another subject to photograph. I used some long exposure techniques to photograph the waves as they crashed on the beach. With the shutter of the camera open for a long time the fast moving waves even out their placement in the picture and fast moving crests disappear. The water appears calm because the camera compresses time. To get a better idea of how this works, here’s a picture (with a fast shutter) to capture the waves as they crashed through the pier’s supports.
Faster shutter speed of 1/60 of a second
Nikon D4 Tamron 24-70mm f/2.8 @ 40mm f/5.6 ISO 6400 1/60sec
With the camera recording information over the course of half a minute the fast moving waves only occupy specific areas for short periods of time, so they are virtually removed from a 30 second picture. The Pier’s wooden legs don’t move and therefore are filmed for the full exposure and are firmly etched onto the camera’s sensor, yielding these pictures.
Long Exposure
Nikon D800 Nikkor 28-300mm f/3.5-5.6 @ 28mm f/18 ISO 100 30 seconds
Long Exposure
Nikon D800 Nikkor 28-300mm f/3.5-5.6 @ 40mm f/9 ISO 100 30 seconds
Thomas Fenwick obtained the land which is now Ocean City (along with much of the surrounding area) from the native Indians who lived there and in 1869 the first hotel opened in the town then known as “The Ladies’ Resort to the Ocean”. Quickly, the narrow strip of land running along the easternmost part of Maryland, became a vacation hot spot. People would frequent the resort town from Philadelphia, New York and the surrounding areas, and with the construction of bridges and tunnels southwards, seasonal tourists poured in from Washington D.C. Today the city is just over 36 square miles, but only a little more than 4 miles are dry land. The year round population is approximately eight thousand, but eight million people visit annually. If you’re looking to have the “Atlantic Shore Experience” Ocean City, MD has all the attractions from its well maintained beaches, night clubs, boardwalk, miniature golf courses, and first class food. Grab the kids and head off to the beach!
