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Message: <blockquote data-quote="Kevin Conville" data-source="post: 1461568" data-attributes="member: 63161">I received my 27/40/50 DS from CameraLand today and it was another perfect transaction with them.I took some time and A-B'd it against my 27/40/50 MC wide to determine, to my eye, if there are any differences. There are none. The view looks identical, center and edges, and eye relief also seems to be the same.The digiscoping adapter I made to attach my Canon S70 to the 16/24/30 DS also works perfectly with the 27/40/50 DS. Here's the interesting part for me, with the 27x on, the camera allows only 1/2 stop over the 16x EP. I tried different conditions and subjects and it is consistently 1/2 stop different. I would have guessed that the 27x would have created a slower effective optical train relative to the 16x than a mere 1/2 stop difference. I'm pleased that it remains relatively fast photographically and I've already gotten good results through the camera. Vibration is the biggest obstacle, of course, compared with the 16x.To those weighing the DS against the MC wide, here's my take...Buy the MC wide if the twist up eyecup is important to you. It turns out it is not, for me.Buy the DS for the bargain prices and/or and the better interface for digiscoping.</blockquote>