Archived posting to the Leica Users Group, 2000/01/16

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Subject: Vs: [Leica] Prescription lens for eyepieces
From: "Jarmo Korhonen" <korhoset@saunalahti.fi>
Date: Sun, 16 Jan 2000 22:11:39 +0200

Hi!
M6 TTL that I acquired last august has a rubber coating in the eyepiece, so I figure that you can buy the newest eyepiece and the thing be cured. I have no extra scrathes in my spectacles. 
All the best,
Jarmo Korhonen

- ----- Alkuperäinen viesti ----- 
Lähettäjä: Clompus, Dr. Richard [INN] <RCLOMPUS@INNUS.JNJ.com>
Vastaanottaja: <leica-users@mejac.palo-alto.ca.us>
Lähetetty: 14. tammikuuta 2000 20:56
Aihe: RE: [Leica] Prescription lens for eyepieces


> 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.
> 
> >