500mm f/8.0 Mirror Lens for CANON® EOS 60D T3i T3 T2i 1D X 5D MARK III 1100D
Untitled 13
PROFESSIONAL 500 MM TELEPHOTO LENS
FOR CANON®
500 F/8.0 CATADIOPTRIC / REFLEX MIRROR LENS
INCLUDES 3 FILTERS
SKY LIGHT , ND-2X , ND-4X AND T-MOUNT FOR CAMERAS LISTED IN THE TITLE
5D
350D
1000D
1Ds MARK
III
10D
400D
XTi
1D MARK III
20D
40D
500D
5D MARK II
30D
450D
XS
50D
300D
XSi
500D
T1i
FOR ALL CANON EOS SLR CAMERAS
(THIS IS A MANUAL FOCUS LENS )
The ROKINON Catadioptric , or Reflex Lens , is a highly
developed computer designed product , using the merits of both reflex optics
and refraction optics. This gives you very sharp picture quality with less
color aberration , which is considered the most harmful factor in the field
of telephoto.
FOCUSING YOUR LENS
Focusing is accomplished while viewing the subject
through the view-finder of your camera and rotating the focusing ring. Since
the aperture is preset, you will find under certain light conditions a
shadow appearance on the split-image section your focusing screen. In this
case, simply focus on the edges of your subject with the outer center of
your fresnel prism.
Note:In order to compensate focusing when normal focusing
may differ due to extreme tempature change, the focusing ring has been
designed to allow rotation beyond the fixed engraved marks of the distance
scale, to avoid error, focusing should always be made while looking through
the view-finder.
Note:No adjustment of focusing is necessary when taking
infrared photography, as is required with normal lenses.
LIGHT AND CONTRAST CONTROL
Since the reflex lens is not equiped with a diaphragm
system , the use of filters plays an important factor in the control of
light and contrast
3 FILTERS: ( INCLUDED)
Normal ( IA Skylight ) : This filter should be used
whenever no other filter is necessary.
ND 2X and ND 4X ( Neutral Density ) : This filters
control the light passage since no diaphragm system is provided in the reflex
lens. Exposure factor is 4 times with a ND4X, i.e., the light in-take through
the lens is decreased similarly as if stopping-down a normal lens with an
aperture, by 2 stops.
Note:ND filters
reduce light passage only, and the depth of field cannot be changed.
EXPOSURE OR APERTURE ADJUSTMENT WITH TTL CAMERAS
Since the aperture of the reflex lens cannot be changed,
the exposure is controlled entirely by the shutter speed being used.The
speed-dial is set according to your TTL reading. Both aperture and shutter
priority on automatic cameras will automatically set the right speed with
its auto exposure mechanism, except a few models which is necessary to
operate on a manual function.
In aperture priority or manual operation of a
camera, appropriate shutter speed must be adjusted using 3 neutral density
filter in case of over exposure readings or the cameras LED warning light is
activated.
CAMERA WITHOUT TTL SYSTEM
When using a camera without a TTL system and filters,
except for the normal filter, the exposure must be stopped down as indicated in
the following table to the shutter speed indicated by a exposure meter reading,
i.e., with the 300mm f5.6 Reflex lens, the setting would be f5.6. If a Y52
filter under daylight conditions is used, the stop-down will be 1. That is, if
the appropriate shutter speed is metered as 1/1000 seconds using a single
exposure meter with a f stop of 5.6, then, the shutter speed setting must be
1/500 seconds.
Note:If a
1/2 shutter speed adjustment is indicated, generally to negative film, a full
one stop should be taken.When a reversal film is being used, disregard the
half-stop setting and use a normal shutter speed.
DEPTH OF FIELD
The area in acceptable sharpness in
front of, and behind, the subject in focus is called the Depth of Field. The
aperture selected and the distance of the subject, as well as, the focal length
of a lens determines such depth of field.
Because of the longer focal length
of your Reflex lens the depth of field is acutely narrow, for example, with a
800mm F8.0 lens, at a distance of 6 feet, the depth of field is only 1/2 inch
wide. Therefore, it is recommended to first practice focusing with your lens
before taking any serious pictures, especially in close-up photography. It is
suggested that a focus magnifier be used to help determine the depth of field
sharpness under such extreme conditions.
SPECIFICATIONS:
Min. Focusing Distance:
5.7 ft (1.73m)
Weight:
0.72 lbs. (330g)
Filter size:
72 mm front (30.5 rear)
Aperture:
f:8 Fixed
Groups/Elements:
6/7
Angle of view:
5 Degrees
Maximum Diameter:
3.0"
Macro Magnification:
1:2.7
Length:
3.4"
ITEM INCLUDES:
ROKINON 500mm f/8 MF MIRROR LENS
Lens Pouch
Front and Rear Lens Caps
3 FILTERS:SKY LIGHT, ND-2X, ND4X
INSTRUCTION GUIDE
1 YEAR WARRANTY
T-MOUNT FOR CAMERA MODEL LISTED IN TITLE
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