This invention relates to a part of the image forming process, such as a microscope accessories sharing the focus is e.g. and will be in control of the situation to be adjusted to a method and apparatus that allows for rapid acquisition of the image data . The device may adjust the operation of the apparatus, a first trigger signal indicating the completion of the operation from the component (33 , 33 ' , 37) to receive the operation by the other components in response to a first trigger signal second trigger signal for starting comprises a ' control means operative to transmit the ( 20 (27 , 27) " ) . The arrangement operates to reduce delay generated during operation of the device .
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