Andoer TTL Auto Focus AF Macro Extension Tube Ring for

Features:

Support accurate TTL & Autofocus.

Built-in electric pins.

Compatible with all EF and EF-S Canon lenses.

Combined of 3 tubes with different length of: 13mm, 21mm, 31mm.

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:

Materials:PC, ABS

Compatibility: For all EF and EF-S Canon lenses

Macro tube size: 6.2 * 8cm / 2.4 * 3.1in (D * H)

Macro tube weight: 146g / 5.1oz

Package size: 9 * 7 * 7cm / 3.5 * 2.8 * 2.8in

Package weight: 185g / 6.5oz

Auto Extension Tube Distance Reading of Master Lens Image Magnification Ratio Field Coverage (cm) Distance From Lens Front to Subject (cm) Exposure Factor 13mm Inf. 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 * Macro Extension Tube Set

1 * Bag

1 * User Manual