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Old Jan 4, 2012, 11:30 AM   #1
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Default Help - Pancake 20mm , how to MF on infinity

I'm trying to figure out how to manually focus on infinity with the 20mm. The focus ring just keeps turning and turning. I want to shoot some night sky images and wanted to pre-set the MF on infinity. Does anyone know? My alternative is to AF on the moon and switch to MF when in focus.
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Old Jan 5, 2012, 11:44 AM   #2
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I don't have the 20mm. I have the 14mm and the EPL1 and I don't believe there is a way to guarantee a pre-focus of infinity. If I point my camera to a point far away (which would for sure be seen by the camera as infinity) and try to manual focus, as I turn the ring it reaches focus but if I continue turning the image goes OOF. The thing is, once I get the infinity image in focus, just about everything else is also in focus. So, I guess you can pick something that is very far away and focus on it. That is your infinity as long as you don't touch that ring.
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Old Jan 5, 2012, 3:53 PM   #3
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Thanks Tullio, you confirm what I've heard from some other people, that there is not an easy way to MF on infinity. I was actually trying to shoot the night sky (stars and stuff) and was having a really hard time. I even had trouble MF'ing on the moon. I'm going to AF on the moon, then immediately switch over to MF. I'll try that this weekend.
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Old Jan 5, 2012, 5:23 PM   #4
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You should be able to AF on the moon w/o a problem. The problem is the exposure. Usually if you shoot in P/A/S you end up with a bright circle. In order to see the craters and dark spots, you should use M and set the aperture and shutter separately.
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