Tuesday, February 10, 2009

Extension tubes


When I was shooting with film, I was using an old Chinon CS-2 completely manual camera. It used the Pentax screw-mount lenses, and I had a set of screw-mount extension tubes for it. Playing around with macro-photography has been fun but frustrating at the time. Waiting for the film to come back was always an issue with me. Now, digital cameras to the rescue.
I received Pro-Optic extension tubes for Christmas for my Canon Digital Rebel Xt. I recently had a chance to play with it.
The photo on the right (or above depending on your browser) was taken with the the 31 mm extension tube on my 18-250 mm Tamron zoom lens. There was no cropping on this photo.
Because of the low light, I had to manually focus. I had a Canon 420 Speedlight for the flash, and because I was focusing about 6 inches from my cat's eye, there was no red-eye. I'm personally amazed she allowed me to do this, though catching it was luck. Cat's get distracted quite frequently...
More information at Outdoor Photographer.

Sunday, February 1, 2009


Image Link

HDR files are fun to play with. I don't personally own any neutral density filters, so I usually take bracketed photos of the scene I want to use and combine them into a HDR file. This works fine with a static image, but one like on the right becomes a little strange to work with.

Because the waves moved during the three exposures (take at f 5.0, 1/4000, 1/2000, and 1/640 of a second) Photoshop had some problems registering the image. The overall results were good. However, the people in the foreground were mis-registered. But, Photoshop to the rescue.

I was able to take the people out of one of the images, and paste them in as another layer so that they looked correct. I had a layer mask so that I could adjust them separately from the rest of the image. I'm not sure I am finished with this image, while I like the way the image turned out, I think the various exposure layers can be better adjusted.