Archived posting to the Leica Users Group, 2000/11/16

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Subject: Re: [Leica] UV filter for Noctilux-measurable light loss??
From: Nicholas Poole <nick.botton@camphill.org.uk>
Date: Fri, 17 Nov 2000 00:19:19 +0000
References: <5.0.0.25.2.20001116085023.01ed9560@127.0.0.1> <5.0.0.25.2.20001116085023.01ed9560@127.0.0.1> <5.0.0.25.2.20001116131519.01e8a250@127.0.0.1> <3A144F17.A6D7D0FF@pce.net> <3A146030.897F2E2@rabiner.cncoffice.com>
 
>  ><Snip>
>>  Anyone else have any thoughts on whether a UV filter cuts out a 
>>measurable amount of light?
>>
>>  Regards,
>>
>>  Rob McElroy
>
>It never occurred to me that it would but come to mention it in very low light
>levels I could see how i COULD have an effect.
>
>On a bright day if the UV filter takes out 1 unit of light out of a 
>few hundred
>units the effect is negligible.
>In a coal mine at midnight with one candle off in another part of the cave you
>have only 5 units of light to work with.
>You don't want to loose one.
>Could that be true? Seems like it would be.
>mark rabiner
>:)
>http://spokenword.to/rabiner/

Well, well. I've learned a heck of a lot from that one dumb question! Thanks.
Nick
In reply to: Message from Tina Manley <images@InfoAve.Net> (Re: [Leica] UV filter for Noctilux)
Message from Tina Manley <images@InfoAve.Net> (Re: [Leica] UV filter for Noctilux)
Message from Tina Manley <images@InfoAve.Net> (Re: [Leica] UV filter for Noctilux)
Message from Rob McElroy <idag@pce.net> (Re: [Leica] UV filter for Noctilux-measurable light loss??)
Message from Mark Rabiner <mark@rabiner.cncoffice.com> (Re: [Leica] UV filter for Noctilux-measurable light loss??)