Re: [Frameworks] UV Lens Filters and Lens

From: Mauri Lehtonen <malehton_at_yahoo.com>
Date: Tue, 29 Mar 2011 08:47:15 -0700 (PDT)

But when talking about close-up filters the numbers mean diopters. When using close-up filter with diopter +1, and your camera's lens is focused to infinity you have maximum focusing distance of 1 meter. Diopter +2 means 0.5 meters, and so on...

-Mauri

--- On Tue, 3/29/11, Matt Helme <dcinema2134_at_yahoo.com> wrote:

From: Matt Helme <dcinema2134_at_yahoo.com>
Subject: Re: [Frameworks] UV Lens Filters and Lens
To: "Experimental Film Discussion List" <frameworks_at_jonasmekasfilms.com>
Date: Tuesday, March 29, 2011, 10:48 AM

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


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



"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


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 comeKevin 
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Received on Tue Mar 29 2011 - 08:47:37 CDT