NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calibrating a Camera-Lens-unit for measuring angles
From: Bill B
Date: 2012 Sep 09, 15:20 -0400
From: Bill B
Date: 2012 Sep 09, 15:20 -0400
On 9/9/2012 10:39 AM, Marcel Tschudin wrote: > Since we noticed that the subject appeared at that time not to be of > much interest for NavList members we continued with it off-list. Thank you Greg and Marcel for generously sharing your methods. The interest was there for me, but time constraints due to family matters and lack of a sophisticated DSLR demanded directed "play" be placed on the back burner. As a (former) semi-professional photographer it occurred to me given the quirks of various lenses (including pin cushion and barrel distortion) the calibration task was non trivial. (Oh for a legendary Hasselblad SWC with the 38mm Biogon and a digital back--yum yum.) As a side bar, my Nikon D7000 has programs to remove distortion from some lenses. Doesn't that introduce an interesting wrinkle! Currently I am reading and re-reading you recent posts. Hopefully I will be able to do some trial runs to get the technique down, then head up to Lake Michigan for some field trials. Bill B