Selecting Extension Tubes for the Canon FD Camera
Extension tubes can be helpful in situations in which you want to get up close to a subject. When taking pictures, cameras and their lenses are only designed to focus in a certain range. Extension tubes can expand that range, and there are many options to be used with a Canon FD.How do extension tubes work?
Extension tubes for Canon FD cameras get mounted between a camera body and a lens. By taking this position, they extend the distance between the lens and the image sensor inside of your camera. The farther away the front of the lens is, the larger the magnification effect. Telescopes can also illustrate this effect. Telescopes can be thought of as having long lenses, which allows you to see very far away. Here are the features of extension tubes:
- Light-tight: They are light-tight so zero light can get in through any of the connections.
- Rigid material: They are made out of a rigid material, either metal or a hard plastic.
- Flexible: They are threaded to fit different types of cameras.
- No glass: They do not contain any glass element, so they do not affect the image other than adding to the magnification.
- Good replacement option: They may be used in place of a macro lens.
Extension tubes can extend your zoom capabilities, and they are commonly used in macro-photography. Examples of photography subjects that you can shoot with an extension tube attached include:
- Flowers and plants
- Rocks and gems
There are a number of items available on the market. Here are a few things to think about:
- Size: Extension tubes come in different lengths. You could find a tube with a length of 12mm, 25mm, or a greater size. The tubes can be stacked so that you can achieve much greater magnification when using them in combination with each other. You could even stack three tubes together, though at that point the minimum focus length may effectively become zero inches.
- Connectivity: Some tubes have electronic contacts, while others do not. Those that do have the contacts can allow the camera to keep communicating with the lens. You will be able to use auto-focus and other features, changing the settings through the controls on your camera body. This can be helpful if you want the camera to do some of the focusing work for you. If you do not have an extension tube with an electronic contact, you can do the focusing by hand. Remember that the use of the lens may affect the amount the light that can enter through the lens. You may have to adjust the aperture manually as you take your pictures.