This last Sunday the TPMG went to the CNE with a challenge for the day. As I replied to the posted challenge I choose to loosely interpret plaid as a color :) Some more of my photos shot for the challenge.
Do we all see colors the same way? The simple answer is no, otherwise why would some people dress in such awful colors. This is not to imply there is anything wrong with the colors of the clothes on this Wards Island clothesline. We also know that some people have various levels of color blindness making it difficult for them to differentiate between colors.
What does this have to do with how we see colors, actually very little. Unlike our ears where we can hear minute differences in frequency (1/wavelength), intensity (volume), in pronunciation and in enunciation (sound envelope) our eyes were not designed for such subtle distinction.
One of the reasons I choose the Canon XT over other camera manufacturers was because of the lower noise levels at higher ISO numbers. Reviews even said the noise levels were similar but with a different look to the more expensive Canon models.
This is a 4x zoom of 4 parts of the top photo: notice the blotchiness of the colors not only in color intensity but in the actual color value. I can attribute some of it to using jpeginstead of raw but I doubt that does much more then smooth out noise spikes. I find the noise more annoying then the graininess of film. Film has most of the noise is uniformly distributed spatially with the noise being primary intensity rather then in color value. Increasing ISO number does not for the most part increase the sensitivity of image sensor it is really only increasing the amplification. Electronic noise causing a lower signal to noise ratio is still the biggest hurdle preventing image sensors from reaching the dynamic range of film. More about color in a future post.
Another Trolly Stop photo
Because color is not so important to the subject matter in this photo I think ISO 1600 is not too bad here.
The first class is those photographs that show motion by having motion blur. While a normal photograph is a frozen moment in time. This type of photo has frozen not a single moment but several moments. The photo on the left is the first of my pinhole lens shots that I really like! It was taken at ISO 200 and with a 15 second exposure, it was also very windy so the bushs and tree branches were also in motion. I had to saturate the colors to make the path of the two bicyclists visible. I have subclassed this as a linear motion blur. Another example of linear blur is when the camera is panned to follow a high speed object such as a race car, in this case the race car is fixed in focus while the background has a linear blur.
The photo on the right was taken in a heavy gust of wind with my lens stopped right down to maximum and at ISO 100 for a 2 second exposure. This subclass of motion blur for lack of a better name I will call cyclic motion blur. Cyclic because the object when disturbed oscillates around its at rest point. For an instance at both extents of its travel it stops moving giving it the characteristic of a multiple exposure stop motion strobe effect.
The next class I call perceptual motion. Our brain is hardwired through genetics and through life's teachings that nature has laws; gravity pulls down an object, if an object is past it's center of gravity it will fall over, water can't be put in a pile... We know without thinking that the shirts in the picture are not static but are being blown by the wind. It is not in the nature of a shirt to hang in the way that the photo shows unless there is wind.
Our mind tells us these people are running not standing still. If they were standing still they would be falling over.
I find one of the big differences of digital photography as compared to film is the reduced dynamic range of digital cameras. This image of a field bike repair was taken at the Leslie Spit. Notice the bright sunlight reflecting off the cement. I am not happy with the light and dark contrast in the above image.
If the image is too bright to the point that one or more of the color channels are clipped/pegged at its maximum value (which is 1024 for the canon rebel xt). Then areas that are brighter then this max value will lose all of the details. The image on the left has had the brightness increased by 25%.
On the other hand if the image is too dark then the dynamic range of image is reduced and fine detail is lost. Some of the detail can be brought back by digitally enhancing the image in a program like Photo Shop. This is especially true if you are working in raw mode. But fine detail is still lost and noise especially in the dark areas will be increasingly visible. There is a mathamatical basis beyond the scope of this post for this increase in noise and lose of detail.
This is one my earlier shots with my Rebel xt using the kit 18 - 55mm lens. I was lucky to catch the moment of realization that the video phone was not the only camera.
This newer picture was taken at dinner at the Taste of Danforth event. It was shot after dusk without a flash in "natural" patio light with a wide open 100mm f2.0 prime lens ISO 800. I leaned the camera on the table to steady the shot. I am happy with the background composition; the transition from the fence on one side to the hair and to tree bark on the other side.
After trying unsuccessfully to catch this little guy randomly scurrying about I relized my camera was in single shot mode and I had to release the button for each refocus. By the time I figured it out all I got was this shot minus a piece of tail. When taking pictures of furry animals I have not had much luck with the Canon autofocus function.
At the Chin Picnic I took several out-of-focus shots at the dog show but only this one where the dog was sitting still turned out. Most of the time I have the camera on center spot focus, this may be a mistake as the fur is too fine to allow a focus lock.
I don't own a macro lens, The closest lens I have is the Canon kit lens 18-55mm from 0.9 feet to infinity. Adequate but a bit slow in focusing and needs a fair amount of light. My first problem was getting in close enough, the focus motor kept hunting. I had to change to manual focus and set the lens at minimum focus distance. To focus I moved in or out till the image in the Canon's tiny view screen seemed to be with my poor eyesight in focus. The next problem was the slight wind, with a depth of field of about 1/4" any swaying will put the object out of focus.
This shot was easy, but had to watch for saturation in the red. I like the way the last of the raindrops from the days rain beads up on the pedals.
I brought my first Tripod for my pinhole camera experiments. I don't count my dirt cheap terrible to use mini-table top tripod as a real tripod. I brought a Velbon Sherpa 250.
Shopping wish list as a result of this outing:
The original Danforth was all about a Greek Neighbourhood, women dressed in black on the front porch crying, mourning the death of a family member. Fruit Markets the only stores in Toronto open 24 hours 364 days a year (closed for Christmas). Times have changed Asians for the most cases have taken over the fruit stores, now open more conservative hours. Many greek restaurants have moved up market greek cusine. The Danforth has become a stylish place to live. Many of the greek people have sold there houses replaced by the multi-cultural mix that is Toronto today.
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