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Our second Winter session was well attended despite the bitterly cold weather and slippery roads. Cold weather is good for indoor projects such as organizing and editing pictures, as well as still life photography. Bill, Jim and I will spend some time developing material on “Photo Editing” over the next few weeks. From the survey we did it appears that PhotoShop Elements and Adobe Lightroom are most widely used. I will send out the survey to the full group today, and will post the results later.
During the “Live View” demonstration we got to view a chessboard with chess pieces “Live” through the lens of a DSLR. This demonstration was to show the trade off between Aperture, Shutter speed and Film Speed also known as ISO. In the examples shown to the left are two extremes.
Lens iris closed down lets less light in, and thus needs a longer time exposure or a higher film speed (ISO).
Lens iris wide open lets more light in, and thus allows faster shutter speeds at lower film speed (ISO).
For most DSLR cameras as well as the more modern mirrorless cameras film speed (ISO) has only a minor effect on the “noise” of the image. Low ISO however gives the best quality picture.
Below these two images I have created a graphic that summarizes the advantages and disadvantages of the different camera settings.
I hope everyone got some idea on how “Shutter Preference” works, and some ideas on how to hold and stabilize a handheld camera. Thanks Bill for the lively demonstration!
The assignment this week is to try Shutter Preference in the real world. Try “freezing” action, and try an artful “Blur”. It is all about choosing a variety of shutter speeds and experimenting. On Shutter Preference the camera figures out the exposure for you. Here are two examples from last fall.
- Q & A regarding Editing Tutorials.
- Depth of Field Presentation with composition examples.
- Live View demonstration of the Exposure Triangle.
- Practice session on Shutter Priority with spinning globes, tops and swinging LED lights.
Here is an interesting simulator to practice the relationship between Aperture, Shutter Speed and ISO. http://camerasim.com/apps/original-camerasim/web//