LensAlign MkII Focus Calibration System

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LensAlign MkII Focus Calibration System

Postby Malcolm on Wed Feb 01, 2012 9:57 pm

Just curious if anyone has used one of these and what your opinion is of both the product quality and the results. I've done calibration using charts taped to a wall but I thought I might try this product .. assuming I get my camera and lense back from the repair shop soon.
Malcolm
 
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Re: LensAlign MkII Focus Calibration System

Postby karl egressy on Thu Feb 02, 2012 6:15 am

I have one and used it several times. It works well. It is fairly consistent within plus minus one, except with extenders on the MarkIV where I found some variations after repeating the tests.
It is superior to target put on the wall. There is a good write up about how to use it and some comments from users, on Arthur Morris's website.
You need a distance equal to 20-25 times of the focal length and two tripods and an Arca-Swiss type of plate for the Lens Align.
For example for the 500 plus 2.0X you need minimum 20 meters to do the test properly as I read it in the description.
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Re: LensAlign MkII Focus Calibration System

Postby Malcolm on Thu Feb 02, 2012 7:56 pm

Thanks Karl .. the stuff by Art Morris was quite interesting.
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