[Leica] Filter for the M8 B+W 486

[lists at sololeicas.com (Eduardo Albesi)]

As I suggested, I think that Leica could (should) offer to re-coat  
one of the internal elements with the IR barrier at the same time of  
the 6-bits conversion of existing lenses. I do not know if it is  
feasible cost-wise for them, but if they are charging USD 175 for a  
rewind crank... :-)

Cheers,

El 22/12/2006, a las 12:18, Frank Filippone escribi?:

> Superb solution, but what do you do with the roughly 10 million  
> lenses out there already?  You tell the new M8 users to dump their
> lenses and buy new ones?  Use older lenses with a filter and newer  
> lenses without, as the filter is built in?
>
> It might be a really neat idea to make a new series of lenses with  
> the coating internal, and label them as such.  That might boost
> sales for new lenses.  But what do you do with the older lenses?   
> How can a user make images on his new M8 using his old 21?  Use
> the filter...
>
> Really, a pretty good solution... and it saves face for the Solms  
> elves as well...
>
> For IR users, use older lenses without the filter.
>
> That accommodates the majority......
>
> Frank Filippone
> red735i@earthlink.net
>
>
> -----Original
>
> Don't you think an effective approach would be to provide a hot
> mirror layer on one of the optical surfaces *inside* the lenses, at a
> point where the light rays incidence angles are more parallel to the
> axis of the optical system and where internal reflections can be
> optimally minimized?
>
> I think this would be an elegant solution if they can control, the
> internal reflections, as the lenses performance will not be altered
> neither on a digital nor on a film system. Leica should offer to
> incorporate such an internal coating on existing lenses at the time
> of the 6-bits conversion. At the same time, they should begin to
> market "digitally enhanced" lenses, with inner IR barrier coatings
> and 6-bits coding.
>
> Best,
>
> Ed
>
>
>
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