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Old July 3rd, 2008, 09:41 PM   #1
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Infinity not in focus.

I've tried to get infinity into focus on my letus and my hv20 with no success despite using every nikon lens I have from 35mm on up to 105mm. Focus works great from anywhere inside sixty feet. Any suggestions or comments would be helpful.
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Old July 22nd, 2008, 12:14 AM   #2
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This is a collimation issue meaning your nikon lens mount is not the correct distance from the imaging plane. We call this feature "micro-collimation" and have a video on the subject on our site. It's a different adapter but the same principles apply. Hope that helps.

Dennis Wood
www.cinevate.com
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Old July 22nd, 2008, 01:18 AM   #3
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Matt: You have to get the flange( backend ) of Nikon Lens about 46.5mm from the ground glass. In my old Letus 35a, I have to do it by manually adjusting the screen on the suspension posts.

I think the new Letus rigs have adjusting screws.

When you can't reach infinity, it means you will have to move the screen a bit closer to the lens. If you focus through infinity, you have to increase the distance.
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Old July 22nd, 2008, 07:08 AM   #4
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Matt.


Could you advise which model Letus you have?
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Old May 21st, 2009, 07:36 AM   #5
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This is useful info. I'm having a similar backfocus issue with my version of the Daniel Schweinert adaptor. My footage is coming out a little soft at infinity.
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