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Old Jun 6, 2010, 4:14 AM   #6
rhermans
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Join Date: Jun 2005
Location: Antwerp - Belgium
Posts: 3,454
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Great shots, and that 90mm looks like it's working great.

Only i have a small doubt about getting a 4:1 with extention tubes.

Suppose you focus at 30mm distance to get 1:1, then you would need 80mm extention tubes to focus at 10mm distance and get an 4:1. What is darn close for a fly.
The only way to really check this is to messure it (with at picture of a ruler or something like that)

I heard speaking about cropping to get an extra magnification but that is to difficult for met to calc.

Any way, like your macro shots.

Ronny
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