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Message: <blockquote data-quote="yenlung" data-source="post: 1676981" data-attributes="member: 69037">Bughunter's successfully using a G1 + 20mm pancake on DCB inspired me to try a DSLR setup. I have a Pentax *istDS, and I borrowed a DA 40mm pancake from my friend. It worked okay but not exactly what I expected. I was hoping that using DCB allow me to use my spotting scope normally, and when I want to take a picture of what I see, I will be able to just flip my camera down and take a shot. I founded out that with Pentax 40mm, after flipping down my camera, I need to refocus  the scope. Also, I cannot use auto focus on the camera. Though I can just set the lenses to the closest possible focusing, and adjust the focusing ring on the scope. Hence my new questions arise: Is it possible using a camera that I do not need to refocus the scope and use auto focus on the camera? If it is possible, how do I know which camera can do that?</blockquote>