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JJC Auto Extension Tube for Canon EF(-S) objectieven (AET-C25)
The JJC Auto Extension Tube For Canon AET-C25 is a 25mm extension tube suitable for use with Canon EF-S and Canon EF lenses. An extension tube has no optical elements so the quality of your lens is maintained and the functionality of your lens does not change.
Every lens has a minimum focusing distance. By placing an extension tube between your camera body and your lens, you reduce the minimum focusing distance. As a result, you can view your subject in a larger frame, which is ideal for macro photography, for example.
How does a spacer ring work?
A spacer ring creates a larger distance between the image sensor of the camera and the rear lens of the lens. This shortens the focusing distance of the lens, making it possible to focus closer on the subject. As a result, the subject is projected onto the sensor larger than it would be without a spacer ring. A spacer ring thus increases the magnification factor of a lens.
This can be calculated using the following formula.
This can be calculated using the following formula.
Maximum magnification with a spacer ring = lens magnification factor + (mm spacer ring / focal length)
Suppose you have an 85mm lens with a magnification factor of 0.13. With the 25mm spacer ring the magnification of the lens becomes as follows.
maximum magnification with 25mm ring = 0.13 + (25 / 85) = 0.13 + 0.29 = 0.42
Characteristics
- Suitable for Canon EF-S and Canon EF lenses
- Reduce the minimum focus distance of your lens
- Use the extension tubes separately or in combination
- Maintains the quality and functionality of your lens
- Ideal for macro photography
- Enlarge the view of your subjects
- 2 year warranty
In the box
- 1 x Extension tube 25mm
- 1 x Storage pouch
- 1 x Manual
