scho
Well-known
Is this method a reliable way of checking rangefinder infinity alignment?
Scroll to graphic at bottom of page:
http://rick_oleson.tripod.com/index-123.html
Scroll to graphic at bottom of page:
http://rick_oleson.tripod.com/index-123.html
scho
Well-known
I tried this by making a + and an X 38mm apart on a sheet of white paper. I set the lens to infinity and when I look through the viewfinder at the target from a distance of about 10 feet the + and X are superimposed to form an *, with perhaps some very slight vertical mis alignment. According to the description this should indicate that my rangefinder is properly aligned at infinity, but I don't think it really is.
jlw
Rangefinder camera pedant
It's sound in theory, but in practice the difficulty is in getting the target lines exactly the right distance apart. If you're off by even a fraction of a mm, the target no longer provides a correct infinity reference.
What's wrong with just aiming the camera at a target with well-defined vertical and horizontal lines, located at least a half-mile or so away... a TV tower, for example?
(Tip: Once you know your RF is correctly lined up at infinity via the above method, you can set it up on a table in front of a white card, shine a laser pointer in through the eyepiece, and mark the locations of the laser dots on the card. This will give you a "portable infinity" that you can use in the future for quick checks.)
What's wrong with just aiming the camera at a target with well-defined vertical and horizontal lines, located at least a half-mile or so away... a TV tower, for example?
(Tip: Once you know your RF is correctly lined up at infinity via the above method, you can set it up on a table in front of a white card, shine a laser pointer in through the eyepiece, and mark the locations of the laser dots on the card. This will give you a "portable infinity" that you can use in the future for quick checks.)