[Leica] Filters and Filter Mounts

[luisripoll at telefonica.net (Lluis Ripoll)]

Hi Marc,

If you can give me the address of Harrison & Harrison I would ask them  
for filters for my Cooke Amotal lens,

Thank you very much,

Saludos cordiales
Lluis

El 26/03/2009, a las 9:18, Marc James Small escribi?:

> At 03:30 AM 3/26/2009, Marty Deveney wrote:
> >Of relevance to this thread is that a UV/IR filter is something that
> >Harrison & Harrison don't make.  It is a filter which removes, by  
> optical
> >interference, ultra-violet and infrared light but allows the  
> passage of
> >visible light.  Infrared causes colour contamination with the Leica  
> M8 when
> >it comprises a large proportion of the reflected light from a  
> subject.
> >
> >Harrison and Harrison, unlike, say, Holland and Holland, my  
> favourite "H&H"
> >company, also don't appear to have a web presence, which makes them  
> much
> >harder to access outside the US.  But I do remember that they are  
> located on
> >"Thunderbolt Drive", someplace in the US, which I thought was a very
> >excellent name for a street.
> >
> >In 1999 I ordered some filters from them and when they arrived (in  
> Prague,
> >after a lengthy transit) I found that they were uncoated.  They  
> might be
> >flat, but without good multicoating, a filter is just an optical  
> millstone
> >around the neck of the kind of modern lenses, which all have  
> excellent
> >multicoating, that I use.  Maybe they are coated now or maybe I  
> ordered from
> >the wrong range, but I didn't go back.
> >
> >If it can't be a leica UV/IR filter, I like the B+W MRC and the  
> Heliopan
> >SH-PMC filters.
>
> Yet again, I have no clue as to what a UV/IR Filter might be but,  
> then, I very rarely use filters.  And I am digitally inept, so what  
> do I know?
>
> Marty, I thought I had trained you better.  "Coating" on filters is  
> a bit of a bogus item.  Coating on lenses is something which the use  
> of a lens hood equals in almost every case.  Do not buy into the  
> 1939 Carl Zeiss Jena hype about its benefits.  There are benefits to  
> coatings but not to the extent promised by the manufacturers.  A  
> proper lens hood is a better answer in most cases.
>
> Harrison and Harrison possibly does not have a web site.  I had  
> thought they did.  I can generate a telephone number for those  
> interested.
>
> Snobs need not apply.  H&H is a very elderly firm with a history of  
> doing things correctly.
>
> Again, I have no idea of the significance of this IR/UV filter.   
> Must be some sort of digital fixation.  That was NOT the start of  
> the thread, as it began by speaking in general terms of Series  
> filters for the pre-Asph 1.4/35 Summilux.
>
> Marc
>
>
> msmall at aya.yale.edu
> Cha robh b?s fir gun ghr?s fir!
>
>
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