Extension tubes are put in between the camera body and any existing lens. They effectively bring the range that you are able to focus on closer to you. For example:
This is taken with the 30 mm lens about 1.5 feet from the They Might Be Giants - Apollo 18 cd case. This is the most zoomed-out picture this session, but the closest possible with the Sigma 30mm lens.
This is the disc cover taken with the 200mm lens from about 1.5 meters away, the closest possible. That's pretty darn far away for being this zoomed in.
This is a picture with the extension tube on my 200mm telephoto lens, held about 70cm away. (70 cm is as close as it can get, even with the tube. It's better than the 1.5 m that was the previous limit, that's for sure!)
This is my 30mm Sigma lens with the extension tube, focused to infinity. That's right, when you can already take pictures about a foot and a half away and you add 25mm between the lens and detector, you can only, just barely focus on something about 1cm away from the lens if you focus to where the lens itself would consider infinity without the tube. But you can still focus pretty dern close!
No comments:
Post a Comment