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Message: <blockquote data-quote="Tord" data-source="post: 3178512" data-attributes="member: 40738">My advise is to start using the scope without TC and take it from there. The main challenge is focusing accurately, at 600mm the depth of field is shallow. To get perfect focus you may want to examine using Live View in magnified mode. This is what I sometimes did when using mirror DSLR, but often the action is too fast to allow for that. Regarding camera settings - what did you have in mind? Regard the scope as a telephoto lens with MF and fixed aperture. I would shoot in AV (sometimes M) and adjust ISO high enough to get acceptable shutter times. How short depends on conditions and your skills in mitigating shake blur. Maybe also delay shutter to mitigate vibrations from mirror slap. Paul with experience from Nikon is the right guy to answer I guess.</blockquote>