Introduction:

Macro Extension Tube Ring For NIKON Ai AF DSLR & SLR

It moves the lens farther from the film or digital sensor.

The farther away the lens is; the closer the focus; the greater

the magnification.

This extension tube does not affect image quality as there is no

optics inside.

In comparison, a close up filters are often blamed for degrading

image quality.

Made of metal (not plastic) ;

color : black

Contains
1 x Macro Extension Tube Set for NIKON
1 x Original Box

Adjustable Length
This extension tube consists of 5 parts:
Camera Body Mount Adapterr
Lens Mount Adapter
9mm tube (Tube 1) )
16mm tube (Tube 2)
30mm tube (Tube 3)

The more tubes you add, the closer the focus and the greater the magnification.

Remarks
There are no electrical contacts in the extension tubes.
Exposure has to be adjusted manually.

Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (without an aperture ring) .

Suitable For
Macro Extension Tube Ring For NIKON Ai AF DSLR & SLR

三段式; 1号2号3号; 可以自由组合

近摄接圈是机身内部为黑色的筒状近摄附件, 由金属制成. 使用时象安装增距镜一样附加在机身与镜头之间, 近摄原理与皮腔完全相同. 通常35mm相机经常使用的接圈分为7mm (1号) ,14mm (2号) 和28mm (3号) 三种; 它们可以单独使用或组合使用; 并能够组成七种不同长度; 如: 三只接圈组合, 用于50mm标准镜头上的像物比例为1∶1. 但镜头的对焦范围将随着接圈的增加而受到限制, 所以在接圈组合拍摄时, 需要移动照相机或被摄体的前后距离配合对焦, 所摄效果与近摄皮腔基本相同.

近摄接圈的优点是体积小, 重量轻, 易于携带; 有些自动接圈可与相机的光圈联动; 另外, 接圈的结构极为简单, 一般不易损坏.