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[quote=RB;334629]
Robert's using a 40D and probably focuses using Live Focus.
I've been using livefocus on the 20Da for years now and never had a problem.
There's also utilities to achieve perfect focus using the various astro software that most people use in the field. quote]
Thanks Fella's, I think I get the picture. I'm actually using Images PLus camera control software's focussing routine to gradually tweak and refine focus. Sounds like the Macro lens is capable of focus here, it's more a comparison between a coarse and a micro focus in terms of sensitivity or feel to achieve precise focus at infinity.
cheers,
Rob
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