----- Original Message ----- From: "Steve Morphet" Subject: 6x7 Eyepiece Correction Lenses
Hello,
Can anyone help me to decide if I would benefit from a correction lens in my 6x7 eyepiece? (It's a 6x7 MLU with plain prism).
On my LX I have the FA-1 set to mid-range, so assuming a linear scale that's about -0.75 diopters. This is the viewing experience that I would like to duplicate on the 6x7.
The 6x7, bought used, came with what seems to be a piece of flat glass in the eyepiece. Is this the standard eyepiece that gives the overall -1D listed in the manual?
Can I compare the -0.75D value from the LX with the -1D of the 6x7? Or, should I read the LX setting as "some built in value" minus a further 0.75?
If my two viewfinders are -0.75 and -1.0, then the difference is only 0.25. That doesn't seem much. Should I expect to feel that the 6x7 needs correction if it is only out by that far?
Or, is the overall diopter of the LX something larger, say -1.75D? In that case I might expect a -1D correction to get me closer than I am at present.
Is it worth guessing at an appropriate correction, or do I need to take my camera to the optician and actually try some lenses?
Thanks in advance for any suggestions.
Find out from your optometrist what your glasses correction is, and try to find a diopter in the same range.
William Robb
