This compact and lightweight extension ring set slides
on or off your camera in seconds to achieve a wide range of
magnification ratios. Each of the extension rings included can be used
alone or in combination to vary the magnification ratio. The shorter
the distance between the object and the lens, the longer the
magnification ratio is. They provide an easy way to compose, focus and
meter at the brightest, fullest aperture without stopping down the lens
manually before shooting. Through-the-lens (TTL) exposure control will
automatically compensate for the lens extension.
The magnification ratio is calculated as follows:
(Assuming that the lens is set to infinity)
Length of added extension
Magnification ratio =
----------------------------------------
Focal
length of the lens
Effective aperture = (Set Aperture) x (1 + Magnification
ratio)
This ring set consists of 5 rings. It perfectly couples
with spot metering and AE mechanisms. The ring that attaches to the
camera has male thread while that attaches to the lens has female
bayonet mount type. For the other 3 rings, the male thread matches with
the female one so there are altogether 7 combinations to obtain various
magnifications. The lengths of the three rings are 9mm, 16mm and 30mm
respectively. All measurements are from the image plane marked on the
camera body to the object.
** Please note that you can
only use manual focusing when the rings are in use. Moreover, the tube
does not have electronic contact and therefore, does not allow aperture
to be controlled by the camera body. Please check your lenses carefully
before purchasing the extension tube.
Specifications:
- (Third-party) Macro
Extension Tube Set for Sony Alpha / Konica Minolta DSLR;
- Compatible camera
models:
- Sony Alpha A900,
A850 A700, A580, A560, A550, A500, A380, A350, A330, A300, A230, A200, A100, A55, A33;
- Konica Minolta
Maxxum/Dynax/Alpha 7D 5D and other Minolta Alpha-mount film cameras;
- Compatible lenses:
All Sony Alpha / Konica Minolta lenses that has long enough depth of
field;
- 5 rings are
included:
- Ring to camera:
male thread;
- Ring to lens:
female baynoet mount;
- Ring 1: 9mm;
- Ring 2: 16mm;
- Ring 3: 30mm;
- Made of metal (not
plastic);
- Black in color;
- Brand new, never
used.
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