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[OM] Re: actual 18 mm value at the moment?

Subject: [OM] Re: actual 18 mm value at the moment?
From: "Jeff Keller" <jeffreyrkeller@xxxxxxxxx>
Date: Wed, 30 May 2007 13:38:09 -0700
The portion between the 49mm threads and the 72mm threads is a nearly
flat cone rather than a flat disk. If I remember correctly the 49mm
threaded length was slightly shorter than the 72mm threaded length but
not very much.
-jeff

On 5/30/07, Tim Hughes <timhughes@xxxxxxxx> wrote:
>
> Moose,
>    I was asking if the total depth dimension you quoted, was roughly split 
> into two by the 72mm
> depth and the 49mm depth or if they had made one shallower than the other 
> splitting the depth you
> quoted unevenly?
> Tim Hughes
> --- Moose <olymoose@xxxxxxxxx> wrote:
>
> > Tim Hughes wrote:
> > > Mosse ,
> > >        when you say total depth, is the part that is 49mm the same depth 
> > > as the 72mm part?
> >
> > I'm not sure I understand the question. If you place the hood/adapter on
> > a table resting on either round end and rest something stiff and flat
> > across the top on the other round end, the dimension I quoted is the
> > distance from the thing on top to the surface of the table.
> >
> > Considered as a conic section cut orthogonal to the axis, this dimension
> > would be called the length.
> >
> > Moose
> >
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