It needs no electrical connection to the camera. The enlarging lens can be focused wide open and then stopped down manually. However, you can often use an enlarging lens on a bellows for some very great image ratio images. Many (most) bellows do not have this type of connection. It is difficult to stop down a lens unless here is an electrical connection between the lens and the camera. I would recommend that flash is used rather than continuous lighting because it is better in quite a few ways: more powerful, less heat and capable of stopping action when the flash is the primary light source.Ī bellows might be another option however, there are some very important problems using a bellows with modern lenses. When you are working with extension tubes, there is quite a bit of light loss so it is best to add supplemental lighting. You "can" achieve this with other than a macro lens and extension tubes but, the macro lens will provide the very best image quality. In order to get a larger than life size image (larger than 1:1) you can add an extension tube or combination of extension tubes to your macro lens. That is, the size of the image on your sensor will be the same, or in a 1:1 relationship to the size of the subject. Louise, a "traditional" macro lens will allow you up to a 1:1 image ratio.
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