Features: Support accurate TTL & Autofocus. Built-in electric pins and drives. Compatibility: for all EF and EF-S Canon lenses. Combined with 3 tubes in different length: 13mm￡? 21mm￡? 31mm; totally 7 different combinations. Made of copper and lead (not plastic) that is more strong. Upgraded circuitry to work better with digital SLRs cameras and SLR lenses. Superior lock pin which can tighten the tube joint. Perfect for macro shooting. High quality and compact.
Specifications: Material: Copper￡? Lead￡? PC Color: Black Macro tube size: 6.2 * 8cm / 2.4 * 3.1in(D * H) Macro tube weight: 241g / 8.5oz Package size: 13 * 7 * 7cm / 5.1 * 2.8 * 2.8in Package weight: 279g / 9.8oz
Auto Extension Tube Distance Reading of Master Lens Image Magnification Ratio Field Coverage(cm)
Distance From Lens Front to Subject(cm) Exposure Factor 13mm lnf. 0.24 10 * 15 21 1.5 0.5m 0.35 6.9 * 10.3 16 1.8 21mm Inf. 0.40 6 * 9 13 2.0 0.5m 0.51 4.7 * 7.0 14 2.3 31mm Inf. 0.72 3.3 * 5.0 7.7 3.0 0.5m 0.83 2.9 * 4.4 7.0 3.4 13+21mm Inf. 0.64 3.8 * 5.6 8.5 2.7 0.5m 0.75 3.2 * 4.8 7.5 3.1 13+31mm Inf. 0.96 2.5 * 3.7 6.0 3.9 0.5m 1.07 2.3 * 3.4 5.5 4.3 21+31mm Inf. 1.12 2.2 * 3.3 5.3 4.5 0.5m 1.23 2 * 3 4.9 5.0 13+21+31mm Inf. 1.34 1.8 * 2.7 4.5 5.6 0.5m 1.47 1.6 * 2.4 4.2 6.1 Package list: 1 * Metal Macro Extension Tube Set 1 * Bag 1 * User Manual"
