Please note no instructions for this product, the camera must be in mode M. with autofocus deactivated. There is no such thing as electrical contact between the camera and the lens. For the future buyers that there should be a minimum of photos on the times of exposures and diaphragm to use the pleat.Everything Must Be Operated In Manual mode. - The Auto Focus has always been difficult with this product, as the depth of field is very small, and the lenses patina. It is often more convenient to do it by hand. - It can be handy to be able to control the diaphragm, it's important to remember that you lose a lot of light with the product, therefore less likely to be in full sun, it must also be often at maximum aperture. And if you can close the diaphragm (For more depth of field), really must be used technology for blocking the driver unit in a certain position (see below). Technology to block the driver unit: Lens - Step The cabinet without the product; - adjust the diaphragm on F9 or F14 For example; - Press the button to "preview the closure of the diaphragm (on the front right hand side of the lens on EOS 550D); - while maintaining the back button, the purpose of the case; - It's finished, the diaphragm is still at the opening. Simply mount it on with the macro bellows.
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