ML Archiv: [OM] Varimagnis, Knife edges and other focusing aids

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[OM] Varimagnis, Knife edges and other focusing aids

from miaim

Subject:	[OM] Varimagnis, Knife edges and other focusing aids
From:	miaim@xxxxxxxxxxxxxx
Date:	Sat, 31 Mar 2001 23:57:22 -0500

I'd like some info on what type of focusing aids would be necessary or just
plain useful for focal lengths in the 500mm, 1000mm and 1500mm range when
used for both astro and terrestial (bird) photos. 

Thanks,
Mike Swaim

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