RE: [Leica] Prescription lens for eyepieces

["Clompus, Dr. Richard [INN]" <RCLOMPUS@INNUS.JNJ.com>]

Eric,

Unfortunately a dioptric corrector lens is not the answer to scratching the
anti-reflective coating on your spectacles.  You need a rubber covering for
the eyepiece.  A garden hose washer sometimes can be used or Leica will sell
you one of theirs.  Once your glasses are scratched, the only option is to
replace them.  Check with your eye doctor or optician if there is a one year
warranty on the anti-reflective coating.  Sometimes you can get the lenses
replaced with this warranty coverage.  Most optical labs warrant the coating
for at least 12 months from peeling, cracking or scratching.

Best regards,

Richard Clompus, OD
Roanoke, VA, USA

		-----Original Message-----
		From:	Eric Etheridge [mailto:eric10@mindspring.com]
		Sent:	Thursday, January 13, 2000 11:07 PM
		To:	leica-users@mejac.palo-alto.ca.us
		Subject:	Re: [Leica] Prescription lens for eyepieces

		I've been scratching the anti-glare coating on my new
eyeglasses, mostly the
		right lens, I suspect by hitting it against eyepiece on my
M6 when I shoot.

		Is (the right) diopter the solution to this?



		----- Original Message -----
		From: Julian Koplen <jkoplen@mindspring.com>
		To: <leica-users@mejac.palo-alto.ca.us>
		Sent: Thursday, January 13, 2000 6:51 PM
		Subject: Re: [Leica] Prescription lens for eyepieces


		> Thank you, Richard.  I am originally from Danville and
just moved to
		Myrtle
		> Beach a few months ago, so I am temporarily without
"connections".
		>
		> Is it relevant that Leica puts a -0.5 diopter in the M
eyepiece and a -1.0
		> diopter in the R?  Or is that just another way of saying
that the virtual
		> distance is 1-2 meters?  What is so confusing is that some
people talk
		about
		> the virtual or projected distance and others talk in terms
of the diopter
		> that Leica has already put into the M and R eyepieces.
		>
		> If I cannot find a cooperative optometrist locally, would
it make sense to
		> consider my own distance +4 correction as a baseline and
then, using the
		> above Leica eyepiece information,  add an additional +0.5
for the M and an
		> additional + 1.0 for the R, giving me an add-on eyepiece
of 4.5 for the M
		> and 5.0 for the R? That way, when I factor in the factory
eyepieces, I'm
		> back at +4 for each?
		>
		> Whew!
		>
		> Thanks.........Julian
		>
		> I will be glad to go off-list from this, but I do think it
may be of value
		> to some other users.  The factory does less than an
efficient job in
		> clarifying this for its customer base.  It would be nice
if they simply
		> said, use your distance prescription, or use a 1-meter
prescription.....or
		> whatever.

		>