Archived posting to the Leica Users Group, 2007/03/06

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] IR Filters; Rain and Sun
From: len-1 at comcast.net (Leonard Taupier)
Date: Tue Mar 6 18:14:37 2007
References: <200703062231.l26MTaZA075878@server1.waverley.reid.org> <45EE0CB0.2050304@verizon.net>

Stan,

I'm trying to answer this question. I believe Henning and I are  
saying the same thing. But there are variables to consider such as  
the ambient lighting, flash, available light, sunlight, contribution  
of vignetting.  If I were shooting in available, tungsten light I  
would use the filter as the magenta cast would be most prominent.  
With flash and in sunlight I might take the filter off. If I shoot  
film I will probably take the filter off.

I plan on testing for the cyan shift with the 21mm, 24mm, 35mm and up  
with and without the filters. I have the UV/IR filters for all these  
lenses. I just need the time to do it. I also want to be as accurate  
as I can. That's why I only mentioned the 21mm lens.

I will not speculate on what Leica can do with firmware and coded  
lenses.

Len


On Mar 6, 2007, at 7:52 PM, Stan Yoder wrote:

> Len observes:
>> What is certain is that Cyan creep is a problem with a wide  lens,  
>> like the 21mm, on the M8 when using the UV/IR filter.
>
> Harrison advises:
>> So for wideangle lenses, take off the filter.
>
> These quotes lead me to ask, what is considered wide here? A 21 on  
> the M8 has the angle-of-view of a 28. Is that relevant, or is it  
> still acting like a 21 re cyan creep?
>
> Stan Yoder
> Pittsburgh
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information


In reply to: Message from s.yoder at verizon.net (Stan Yoder) ([Leica] IR Filters; Rain and Sun)