Archived posting to the Leica Users Group, 2008/06/17

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Subject: [Leica] How IR filters affect M8 B&W
From: kididdoc at cox.net (Steve Barbour)
Date: Tue Jun 17 09:10:53 2008
References: <469309.58596.qm@web82107.mail.mud.yahoo.com>

On Jun 17, 2008, at 8:55 AM, Bob Adler wrote:

> I like Peter's test and will try it myself, but under different  
> conditions; the conditions I mostly shoot under. Incandescent light  
> and outside (not quite sure where I'll get a mirror for that;  
> perhaps I'll find another subject...). I may also try it on a tripod  
> for a landscape as I use the M for when I travel.
> But I like Peter's thinking and approach. I'll give it a whirl for  
> the type of shooting I do to see if there is such a marked  
> difference as Peter got.
> I would encourage any of you to try the same and let us all know  
> what you find.


agree,


and we'll have quite a gallery of Leica using test shooters...


Steve
>
> Bob
>
>  Bob Adler
> Palo Alto, CA
> http://www..raflexions.com
>
>
>
> ----- Original Message ----
> From: Lottermoser George <imagist3@mac.com>
> To: Leica Users Group <lug@leica-users.org>
> Sent: Tuesday, June 17, 2008 8:46:35 AM
> Subject: Re: [Leica] How IR filters affect M8 B&W
>
> Peter's test shows us what this lens will do wide open, hand held, by
> Peter, at a 360th of a second, with and without a filter.
>
> Locking the camera down on a solid tripod, stopping down to where the
> IR wave lengths will also be in focus "may" very well provide a
> different result. All of us with M8's could spend time testing our
> various lenses, with and without filters, at various apertures,
> focused on various subjects, with various amounts of IR present.
>
> When discussing sharpness and contrast camera movement and subject
> movement must be absolutely removed from the equation (as much as is
> humanly possible).
>
> Peter's test, while interesting and informative, certainly did not
> reduce camera and subject movement to anywhere near zero.
>
> Fond regards,
> George
> george@imagist.com
> www.imagist.com
> http://www.imagist.com/blog
> Picture A Week - www.imagist.com/paw_07
>
>
>
> On Jun 17, 2008, at 10:24 AM, Steve Barbour wrote:
>
>> what started all this is the vague memory of several of us (or was
>> it confabulation?) that without IR filters,  bw on the M8 is in
>> fact slightly improved, sharper, more contrasty thanks to the IR  
>> rays,
>>
>> anybody know about this?
>
>
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In reply to: Message from rgacpa at yahoo.com (Bob Adler) ([Leica] How IR filters affect M8 B&W)