Re: Vs: [Leica] Prescription lens for eyepieces

[Chandos Michael Brown <cmbrow@mail.wm.edu>]

I very neatly covered the eyepiece with gaffer's tape.  End of scratching.

Chandos

At 10:11 PM 1/16/2000 +0200, you wrote:
>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.
> >
> > >



Chandos Michael Brown
Assoc. Prof., History and American Studies
College of William and Mary

http://www.wm.edu/CAS/ASP/faculty/brown