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Prime lens adapter DOF question

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Joe Tyler
Prime lens adapter DOF question
on Jul 20, 2009 at 1:16:50 pm

Tech question.
When using a DOF adapter such as the Letus, The lens in front of the adapter determines Depth of Field. The image is projected on the ground glass in front of the EX1/3 Lens.
Does the iris on the camera lens (behind the DOF adapter) have any bearing on DOF?

Will a standard DOF calculator work for a Letus?

Letus Tech support can take weeks to get back to me, so I decided to ask the experts.

http://www.killianthered.com
DP in the Washington DC Area
EX3 Owner


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Michael Palmer
Re: Prime lens adapter DOF question
on Jul 20, 2009 at 4:16:56 pm

"Does the iris on the camera lens (behind the DOF adapter) have any bearing on DOF?"
No but the focus of this lens is critical. You will end up wide open most of the time on the EX lens as these adapters eat light.

"Will a standard DOF calculator work for a Letus?"
If you are asking if the 35 mm lens will have the same calculations of DoP then Yes.

Good Luck
Michael Palmer


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Brent Dunn
Re: Prime lens adapter DOF question
on Jul 22, 2009 at 3:14:07 am

Wow, do they really take weeks to get back to you? I've buy Cinevate's Brevis if that's the case.

Brent Dunn
Creative Director
DunnRight Video.com


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