> -----Original Message-----
> From: Behalf Of jeff_conrad
> Sent: Friday, September 21, 2001 10:27 PM
> To: [EMAIL PROTECTED]
> Subject: EOS Re: Macro Focusing Rails
>
>
> Jay D. Washington wrote:
>
> > ... The RRS focusing sliders don't really look like they offer fine
> > adjustment; however, so I'm looking for something I can use my
> RRS plates
> > with and still have fine focusing on the rail.
>
> They aren't rack and pinion, but in my experience, the very minor
> refocusing that is needed after positioning the RRS slider causes little
> noticeable change in framing.
Jeff,
To what scale have you gone too in using the RRS slider? I've currently
planning on using a reverse 50mm (Canon 1.8) on a 105mm (Sigma)for about a
2:1, and I can see the slider being okay for maybe as far as 1:1, but have
you used it for greater magnification? I would think you would need the
precision when you go to higher ratios, but I could be wrong. It's hard to
tell without having my hands on one. I'm thinking I may even go as much as
4:1 with a reversed 28mm on the 105mm, so I don't want to spend $188 on the
B-31 to find it doesn't meet my needs later. Thanks for the info, and the
link to the Kirk rail.
Cheers, JD
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