Here is an example of contrast reversal using a diatom exhibit. The effect is quite nice with darkfield images.
This is a “new” discovery for me; but, the process is very old school. It is based back in the days when astrophotographs were black and white photos and the astronomers noted that the negatives revealed more detail than the prints.
Darkfield of the slide:
Inversion contrast of Darkfield image:
Diatom Exhibit (inverted image)
Brian Matsumoto, PhD
A great place to see art is sometimes at your favorite restaurant or in a frequented office lobby. Businesses need to fill their walls with something suitable for their establishment. Displaying local artists work is a great way to fill those blank spaces while helping out someone in the community. In addition, the displayed artwork tends to change frequently meaning that the next time you visit your favorite restaurant or walk into an office building’s lobby, there may be new artwork to view. Most artists will include some information about each of their pieces and have their biography available. Many times the art is for sale. So the next time you are out and see some artwork that you like or intrigues you, ask an employee about it. You might be surprised to find someone you already know created the work.
Posted in Art
Tagged art, artwork
Are you a photography novice? Or maybe you have experience but you don’t know how to determine the best exposure for a specific situation. dSLRs are still a wonderful camera for you.
The mid to upper end digital cameras have automatic modes where the camera controls all of its own settings. The camera’s firmware determines the scene, current lighting and distance and then calculates what the best settings are for the image it registers in the viewfinder. You don’t need to know what the shutter speed should be or which ISO is best. The camera will try to figure it out for you. Just set the camera to its intelligent automatic or one of its predefined scene modes and point and shoot. Just that easy.
Or maybe you know your way around the camera and want to co-own the camera setting responsibility with the camera. You can choose one of the semi-automatic modes (P, S, A) where the camera determines some of its settings and you determine the rest. This starts your ability in determining the image outcome, which might not be the camera’s choices but one where you can create an image with a mood or specific lighting.
Of course, you can have all the fun and manually take full control and test your photography expertise to create a quality, exciting image.
How you use your camera doesn’t have to be determined by your level of expertise. Experimenting can reward you with wonderfully captured images. Isn’t technology great!
I enjoyed photography growing up. I wasn’t into taking pictures of family gatherings or of summer vacations. I preferred the artistic approach. I would arrange flowers and interesting objects by a window and take black-and-white photos. Outside I would look for natural patterns and textures such as rocks and tree bark. I would vary the camera’s meager settings to see the results.
Eastern Sierras birch grove
I got my first SLR as a college graduation present. I purchased a telephoto lens, a set of macro lenses and a UV filter to go with it. I loved the flexibility and picture taking range the camera gave me. I still worked with black-and-white on occasion but I enjoyed color more.
I hung onto my film camera long after dSLRs came on the market. The first time I thought of going digital was after my children and I had traveled to England and shot well over 20 rolls of film. The cost of the film and its processing was a clue that I needed to switch. But no. It would take several more vacations before I would trade in my film camera for a digital.
My first digital camera was a small point-and-shoot Minolta. Very easy to carry and simple to use. After that I went through a progression of more complex dSLR cameras ending up with the micro four thirds Panasonic GH2. Lots of bells and whistles compared to the small Minolta.
It has been great fun learning how to get more out of photography. And one of the best rewards is if I don’t like the picture there is always the delete button.
A microscope is indispensable for studying the smaller plants and animals. The picture on the right is the microscope that I have used for taking many of the photographs on this site. It is 50 years old but it provides clear and contrasty images that rival what can be obtained with a modern microscope. However, old microscopes of this vintage can be purchased at a reasonable cost and are truly a lifetime investment.
At the top of the microscope is a digital camera–a single lens reflex. Remove the lens and replace it with a tube that joins the camera to the microscope and you now have a camera system for recording your observations.
Below is a picture of a section of a plant leaf enhanced with polarized light.
Plant Leaf under the Microscope
Brian Matsumoto, PhD