Extension Tube Calculator
Calculate the effect of extension tubes on magnification and focus distance.
Lens & Extension Tube
Total Magnification
0.63×
+0.50× from extension tube
Calculated Results
Reproduction Ratio1:1.6
New Min Focus Distance180 mm
Working Distance105 mm
Light Loss1.2 stops
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.