Well, I guess I shouldn't write some of this stuff at 1:00 a.m. I should
have also included the info that all I removed was the optics "module'. Of
course, I left in the mechanical part, otherwise I wouldn't have had
"automatic" extension tubes.
Since the optic "module" has to be held in place, that portion of the
teleconvertor is the part that potentially causes vignetting. A standard
extension tube will have much more open interior space than a modified TC.
However, it seems to work...
In removing the optics from the Vivitar, the optics came out cleanly in one
piece. The Soligor was more difficult to remove. It was also complicated
by the fact that I don't own a spanner wrench (eBay here I come again!) and
I used a set of needlepoint pliers to remove the retainers.
-----Original Message-----
From: Terry and Tracey [SMTP:foxcroft@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Friday, March 19, 1999 3:22 AM
To: olympus@xxxxxxxxxxxxxxx
Subject: Re: [OM] "Cheap" 25mm Automatic Extension Tube
>At this point, I have only tried the "tubes" with a 50mm 1.8 and can see
no
>vignetting. I will check this out further and keep you informed. But,
>from what I see initially, this will work out fine.
>Now, let's see, I still have a 2x teleconvertor coming through eBay...
You shouldn't get vignetting with tubes. I think it actually decreases any
already there.
Stacking lenses is the opposite. I need to go to 150mm + tubes or 200mm to
stop vignetting with a reverse mounted 50mm.
Foxy
Foxy
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