Re: [Frameworks] UV Lens Filters and Lens

From: Matt Helme <dcinema2134_at_yahoo.com>
Date: Tue, 29 Mar 2011 07:48:40 -0700 (PDT)

Remember, when you open the lens by one stop, you increase the amount of light
coming in by two.A filter factor of two means open the lens one stop.
Matt

 http://www.youtube.com/results?search_query=oscarthepug1234&aq=f




________________________________
From: Matt Helme <dcinema2134_at_yahoo.com>
To: Experimental Film Discussion List <frameworks_at_jonasmekasfilms.com>
Sent: Tue, March 29, 2011 10:36:44 AM
Subject: Re: [Frameworks] UV Lens Filters and Lens


+1,2 and so on refers to the filter factor, how many stops you have to open the
lens to compensate for the loss of light when you use a filter.
Matt

 http://www.youtube.com/results?search_query=oscarthepug1234&aq=f




________________________________
From: Mauri Lehtonen <malehton_at_yahoo.com>
To: Experimental Film Discussion List <frameworks_at_jonasmekasfilms.com>
Sent: Tue, March 29, 2011 7:18:40 AM
Subject: Re: [Frameworks] UV Lens Filters and Lens


Hi,

"Nahlinse" means "close-up lens". I don't know about those other lenses.

-Mauri

--- On Tue, 3/29/11, Kevin Timmins <on-one-2_at_hotmail.com> wrote:


>From: Kevin Timmins <on-one-2_at_hotmail.com>
>Subject: [Frameworks] UV Lens Filters and Lens
>To: frameworks_at_jonasmekasfilms.com
>Date: Tuesday, March 29, 2011, 6:54 AM
>
>
> Hi, I purchased a bundle of Super 8 stuff a while back and wondered if anyone
>can tell me what the following items are:
>
>
>First there is a selection of 4 UV lenses. Now I realize that the purpose of
>these lenses are fairly self explanatory, that is to keep out extra sunlight.
>I'm wondering however how the grading system works exactly? As you will see from
>the pictures there is a -0, +1, +2 and another that says S L39.3. The two
>Nahlinse filters are concave, does this effect the light coming in some how? Are
>any of these worth keeping or should I sell them off on ebay? If sell then how
>should I price them?
>
>
>Secondly there is some kind of Lens, a rather large lens that extends quite a
>bit when twisted. The lens case says EMC on it and the lens itself twists from
>infinity to 0.7. Once again is it worth keeping, if I decide to sell it how much
>should it be priced at etc?
>
>
>Thanks for any help to come
>Kevin
>-----Inline Attachment Follows-----
>
>
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Received on Tue Mar 29 2011 - 07:48:52 CDT