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Re: [OM] Macro Crash Course; long [was] auto extension tube or auto-tu

Subject: Re: [OM] Macro Crash Course; long [was] auto extension tube or auto-tube 65-116
From: "John A. Lind" <jlind@xxxxxxxxxxxx>
Date: Mon, 17 Dec 2001 04:14:17 +0000
At 08:42 12/17/01, Foxy wrote:
I've used the 25mm tube with the 116 and a 300 f4.5. I was bored and wanted
to do long macros. Too much vibraion (as expected), but hey, it was fun.

Foxy

I realized there were limits to how much could be stacked when I put the entire Vivitar AT-21 on the back of the 200/4 once (12+20+36 = 68mm). It was stable enough, but near the limit. They Vivitar set is well made; the flanges are a tad less solid than the OM tubes though. Had been tempted to bolt the 300/4.5 on a tube or two, but after doing that with the 200/4 realized it would take at least the entire Vivitar stack and be much less stable. Your comments confirm it wouldn't work very well without additional lens support.

Thanks,
-- John


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