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Re: [OM] Tamron 90mm 2.5 lens

Subject: Re: [OM] Tamron 90mm 2.5 lens
From: Jay Maynard <jmaynard@xxxxxxxxxxx>
Date: Fri, 21 Jan 2000 00:23:21 -0600
On Thu, Jan 20, 2000 at 10:44:58AM +0000, norman dudman wrote:
> 1/Does the 2x flat field converter use a lens in its  construction?

Dunno about the flat field converter, but mine (not marked flat field) is a
simple extension tube that goes between the lens and the Adaptall.
> 2/Would I get just as good a result with a 45mm extension tube?

I would expect so, or any extension tube that will let you reach the
magnification you need. There's nothing magic about 45mm specifically.

> 3/Am I correct in assuming 45mm extension added to the 45mm rack of  the 
> lens will give me 1:1?

I'm not near mine, or I'd measure it to see. I'll do so when I get home.

> 4/What about using a Vivitar 2x converter to get 1:1?

Erf. I'd expect poorer tather than better results this way.

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