The wind has placed a dampener on the activities on the slough as I’ve been mentioning for a month. Then again as I’ve said it must be OK because I am able to take enough images to satisfy my blogs. They are varied enough to expose the issues I’m having with photography as well as the good photos. I was fortunate enough to be able to take some good pictures of one of the residents of Taylor Slough; Turkey Vulture.
I was able to snap the shot from about 60 feet from me as the wind pushed them from the N.W. inland. Eventually they flew directly over my head then flew East. I edited these photos due to them being under exposed, hmm. As luck would have it I came across an article written on that same subject as I was taking a break from editing.
The photo in this frame is not the same picture however it is in the same sequence shot at 1/4000 shutter speed, ISO 500 and F 6.3. The photographer who wrote the article pointed out that if the camera is set correctly and the photo comes out detailed and is fixable but is still under-exposed; the snag may be too fast of a shutter speed, I suspect it may be creating my common problem.
The writer suggested setting the shutter speed no lower than using the ISO as a starting point. If it is set at ISO 500 as this was the shutter speed should be no slower than 1/500. The maximum was not mentioned it must be set to the conditions; and we figure that out through experience I suppose.
No matter which way it is cut 1/4000 was way too fast to avoid underexposure. The maximum under these conditions are closer to 1/1000 or 1/1250, I have found the higher value is my general maximum if I can help it. However that is one of the troublesome issues when shooting in AV mode, the camera sets the shutter speed. About 80% of the time it works out perfectly, however in some cases such as this one it almost worked. Happily the pictures were not beyond repair they basically merely needed to be lightened.
It’s the same situation with the image in this frame, close but still in need of editing (lightening). That is not bad in itself, keeping a sharp eye out as it is being edited is the critical side. I have a tendency to expect less from a photo that is not exposed correctly so I edit more making excuses in my mind why I should accept an inferior picture.
The remedy is to set the camera’s shutter speed correctly to begin with which in AV mode is controlled by the ISO. My challenge as it has been for a while is to set the sensitivity (ISO) until I achieve the desired shutter speed. If my ISO is 650 then my shutter speed should be no lower than 1/650. That is OK, but it’s not a good speed for this picture, it’s too slow. As it is while I’m writing this perhaps the shutter speed should be in the 1/1000-1/1250 range. That suggests to me the ISO will be in the 800-1000 range, the absolute ceiling for me to avoid distortion. With a ISO 650 I would expect a shutter speed range of 1/700-1/900, perhaps a bit faster but not much more. But then again it all depends on lighting, what the subject is, if the subject is stationary or dynamic and if it is flying. All of these affect the shutter speed, I will work on it tomorrow.
I received my new travel wheel chair earlier this week, it took less than 5 minutes to assemble. I took it to a Doctors appointment yesterday, Mrs. Lebec and I lifted it in and out of the Excursion, it weighs 50 pounds. That will take some getting used to because of it being a bit awkward, not heavy for two old people. I’m happy to have to it, my wife will not have to struggle through parking lots, doorways and curbs just to help me out. This is one way I am able to help her; that makes me happy.
“I’m better than yesterday but not as good as tomorrow.” Jacques Lebec
Jacques Lebec Flutter Shutter