White Color Metal AF Macro Extension Tube Ring For Canon EOS EF EF-S

White Color Metal AF Macro Extension Tube Ring For Canon EOS EF EF-S IS
Description:
This Canon AF tube set contains three piece tubes of different length. It couples perfectly with the camera's automatic diaphragm. With cameras of TTL, AE(Through-the-lens, Automatic Exposure) type it gives perfect coupling except when combined with electronic flash AE unit.
Specification:
Color: white
Type: AC-MC Canon Extension Tube Ring
Connecting Ring Material: Metal
Built-in: gold-plated electronic contact
Suitable for: all Canon EF EF-S and IS series lenses
Features:
Auto-focus function can operate.
Transform your Lens into a Macro Lens.
It moves the lens from the film or digital sensor.
The extension tube does not affect image quality.
Can rest assured that the use of telephoto lens on.
The closer the focus is, the greater the magnification.
Standard configuration, strong versatility, is suitable for EF-S bayonet.
Can be taken in accordance with the need to use alone or used in any combination.
It can be converted into ordinary lens: "kind of macro" lens without loss of autofocus and metering function.
Desired Magnification:

13mm Tube
21mm Tube
31mm Tube
13mm + 21mm Tube
21mm + 31mm Tube
13mm + 31mm Tube
13mm + 21mm + 31mm Tube
Technical Parameter:

Automatic Close Shot Adapter Ring	Lens Focusing Distance Reading	Image Magnification	Video Coverage	Lens Front To Object Distance	Exposure Compensation Coefficient
13mm	Infinity 0.5m	0.24 0.35	10x15 6.9x10.3	21 16	1.5 1.8
21mm	Infinity 0.5m	0.40 0.51	6x9 4.7x7.0	13 14	2.0 2.3
23mm	Infinity 0.5m	0.72 0.83	3.3x5.0 2.9x4.4	7.7 7.0	3.0 3.4
13+21mm	Infinity 0.5m	0.64 0.75	3.8x5.6 3.2x4.8	8.5 7.5	2.7 3.1
13+31mm	Infinity 0.5m	0.96 1.07	2.5x3.7 2.3x3.4	6.0 5.5	3.9 4.3
21+31mm	Infinity 0.5m	1.12 1.23	2.2x3.3 2x3	5.3 4.9	4.5 5.0
13+21+31mm	Infinity 0.5m	1.34 1.47	1.8x2.7 1.6x2.4	4.5 4.2	5.6 6.1

Kindly Note:
According to the different combination of three of the support ring, and can realize different magnification.
In the lens of F=50mm as an example, take a look at the combination of different ground loop magnification can be achieved as follows.

Close Shot Loop Combination	As The Adjustment Range Than
Not add	1:0.20-1:0.34
1	1:0.34-1:0.48
2	1:0.48-1:0.62
1+2	1:0.62-1:0.76
3	1:0.76-1:0.90
1+3	1:0.76-1:1.04
2+3	1:1.04-1:1.18
1+2+3	1:1.18-1:1.32

Package Included:
1 x AF Macro Extension Tube For Canon EF EOS
Note :
We have other three color for you Blue, Red, Gold,