Hi Wayne;
Just checked; definitely convex. A little mound of glass.
Brian
From: Wayne Harridge <wayneharridge@xxxxxxxxxxxxxxx>
To: bj@xxxxxxxxxxxxxxx
Date sent: Fri, 24 Mar 2006 15:32:16 +1100
Subject: Re: : [OM] Re: E-300 weird behaviour with Tamron 90/2.5
Type II -
follow-up
> > Brian Swale <bj@xxxxxxxxxxxxxxx> wrote:
> >
> > AND, in situations where I least expected it, where I had taken special
> > measures to avoid flare, the images had a *large* (10 - 15% + of image
> > width) bright blue round spot with no hint of aperture blades, in the
> > middle of
> > the shot.
>
> I'd be interested to know if the rear surface of the lens is concave or
> convex.
>
> My guess is that if it is concave you will see some sort of spot, but if it is
> convex the reflected light will just generally degrade image contrast as the
> rear surface will not tend to "focus" the light.
>
> ...Wayne
>
> Wayne Harridge
>
> http://lrh.structuregraphs.com
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