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| Extension Tubes |
Earlier I experienced vignetting when I added certain close-up filters. I found that I must open my aperture to eliminate this problem. With the strongest filters, I had to open to f/2.8, the lenses widest.
Later I discovered that the addition of extension tubes had an effect on this phenomena. If I added enough extension, I could use smaller apertures. Lately I have liked f/5.6 and experienced no vignetting until I was using a short focal length filter. When it reared its ugly head I eliminated it with the addition of 20mm more of extension. I recently purchased a second set to explore whether more extension would benefit my photography. To this time, I have not found that it will but I keep trying.
The above tubes total 68mm. They have three parts, 12mm; 20mm; and 36mm. They are placed between the camera and the lens. They have the same mounts as used on your camera system. If I use a teleconverter, which I will discuss at another time, I place it between the extenders and the camera.
The above tubes total 68mm. They have three parts, 12mm; 20mm; and 36mm. They are placed between the camera and the lens. They have the same mounts as used on your camera system. If I use a teleconverter, which I will discuss at another time, I place it between the extenders and the camera.
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