[Leica] IMG: Friday: a flower

[jhnichols at lighttube.net (Jim Nichols)]

Thanks for the explanation, Doug.  I don't have the 14198, so I have not had 
experience with it.  What you say does make more sense than my simplistic 
interpretation of what I read.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: <wildlightphoto at earthlink.net>
To: <lug at leica-users.org>
Sent: Friday, August 26, 2011 5:50 PM
Subject: Re: [Leica] IMG: Friday: a flower


> Jim Nichols wrote:
>
>>>>
> I have experimented with a bellows, and I am amazed at the shallow DOF 
> that
> results.  I got a hint of this when I read the instructions for using the
> extension with the 60mm Macro.  The instructions specify setting the lens
> at smallest aperture before adding the extension.
> <<<
>
> The instructions for the 60 Macro specify setting the lens aperture at the
> smallest setting before adding the 14198 extension tube because the 14198
> has its own aperture ring, and it also has a collar that covers the lens
> aperture ring.  Setting the lens aperture ring to the the smallest setting
> allows the lens to fit the 14198 because this extension tube has a lockout
> that prevents the lens from being mounted if the lens aperture ring is not
> set to f/22.  This allows the extension tube aperture ring to use the full
> range of apertures.
>
> The whole reason behind the aperture ring on the 14198 was that its first
> metering cam adjusts for the extension factor.
>
> With any extension other than the 14198 the lens aperture ring does not
> need to be set to any particular value.
>
> Doug Herr
> Birdman of Sacramento
> http://www.wildlightphoto.com
>
>
> --------------------------------------------------------------------
> myhosting.com - Premium Microsoft? Windows? and Linux web and application
> hosting - http://link.myhosting.com/myhosting
>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
>