MC Rubinar 4.5/300 Macro Telephoto
Lens
Description:
MC Rubinar 4.5/300 Macro Telephoto Lens with multilayer coatings of
optical surfaces serves as interchangeable one for the Zenit cameras with 24x36
mm format, 45.5 mm working distance.
MC Rubinar 4.5/300 Macro Telephoto Lens Specifications:
|
Focal
length, mm:
|
300
|
|
Maximum Aperture
|
f/4.5
|
|
Angle of View:
|
8°
|
|
Number
of elements/groups:
|
11/7
|
|
Minimum
taking distance, m:
|
1.7
|
|
Mount thread for Attachments:
|
M
77x0.75
|
|
Dimensions, (Diameter x Length):
|
92x98
|
|
Weight,
kg:
|
0.7
|
You may use the lens as Hand Telescope
if you purchase Tourist
- FL (an eyepiece attachment).
You may also use the lens for Astrophotography
if you purchase TeleconverterTKL2.
The set increases the focal length to 600mm.
See more about how to use lenses
with various cameras here >>
Lens design
The thread in the front part of the lens
serves for screwing in the lens hood and attachments. The distabce scale serves
for approximate focusing; the distance values are shown in metres and in foot.
The focusing is performed by rotation the ring. Accurate focusing is performed
over the ground glass. The ring serves for fixing the lens on the tripod and
for turning the frame on 90° during the arrangement of the subject.
Operating procedure
Before installation of lens on the camera
take off the rear lid. Screw in the lens "MC Rubinar 4.5/300 macro"
in the camera as far as it will go.
Owning to the great mass of the lens it is recommended to use a tripod. The
using of the tripod makes it possible to turn the frame on 90°; in this case
the lens with the camera andthe turning ring remains immovable.
The lens focusing is performed by rotation the focusing ring until the sharpest
possible image of the object is obtained on the ground glass. The distance range
from 6 m to 4 m is a macrophotography and the scale of photography is
from 1:6 to 1:4.
The delivery set includes five light filters:
UV-1.4x - is a colourless one used to weaken the influence of ultraviolet
rays. In mountainous regions and on water it makes it possible to cut out the
ultraviolet rays. It used at black-and-white and colour photography.
O-4x - is an orange one ensures the obtaining of a contrast image
(black-and-white photography), weakes the influence of atmospheric haze.
YG-8x - is a yellowgreen one used to correct the tone rendition in
black-and white photography on panchromatic film both with natural and artifical
lighting.
The lens hood is used to remove the beams of light sources. Screw in the lens
hood on the lens over the thread.
Lens care
Photographic lens is a complicated and sensitive
optical instrument that needs careful treatment. Disassembling of the lens for
repairs is admitted only in the special repair shop. The lens is designed for
photographing at the temperature from -15°C to +45°C. when bringing the lens
from the cold into a warm room, don't open its case to prevent fogging of optical
details. Allow the lens to warm up in the closed case during 3 hours. When not
using the lens close its lids. Keep the lens in its case. Protect the lens from
blows, moisture, dirtying and sharp fluctuation of temperature. Take care of
the coated surface of the lens; mousture that is found for a long time of the
coated surfaces may spoil the coating film. Don't touch the optical details.
Remove dust from surface with a clean soft degreased hair brush. Dirty spots
are best removed with a cotton wool wad on a small wooden stick. It is necessary
to slightly moisten a wad in rectified alcohol, ether or mixture of these substanses.
The large dirtying remove with several wads. Clean the surface with circular
motions, gradually moving from the center of the lens to its edges.
If you purchase the special adapter, you can use this
lens for cameras
Canon EOS
Canon FD
YashicaFR/Contax
Minolta AF
Minolta MD
Nikon
Olympus
OM
| 
