MC Rubinar 4.5/300 Macro Telephoto Lens for Nikon

Description

MC Rubinar 4.5/300 Macro Telephoto Lens

Description:

This lens with multilayer coatings of optical surfaces serves as interchangeable one for the Zenit cameras with 24×36 mm format, 45.5 mm working distance.

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 77×0.75
Dimensions, (Diameter x Length):	92×98
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-1.4^x – 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-4^x – is an orange one ensures the obtaining of a contrast image (black-and-white photography), weakes the influence of atmospheric haze.
YG-8^x – 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.

Note: This adapter is only for long-focus lens (such as Rubinars, Telezenitars and similar).

For using Nikon cameras with M42 lenses (Praktica, Zenit). It is impossible to compensate flange bases difference without using an additional back lens. As a result, the picture quality becomes worse. So metric scale M42 doesn’t keep its meanings and focusing can’t be to infinity.

You should remember that extension ring doesn’t work, diaphragm control is set manually. This adapter can work with lenses having both only automatic diaphragm (A) and selector A/M (automatic/manual diaphragm). It is possible to use Macro rings and other accessories. Approximate focal lengths: 50mm-1,5m; 85mm-3,5m; 135mm-6m.

Settings:

1. Put red marks of the adapter and lens collar together.
2. Turn the adapter clockwise till the fixative click.
3. Set M42 lens.

Removing:

To remove the adapter you should unpress fixative pin and turn the adapter anticlockwise.

Note:

Working with M42 lenses acknowledgement of the focusing is not made. The aperture is not set. Expo-modes:

1. P (program) – identical to Av mode;
2. Tv (flash priority) – doesn’t work;
3. Av (diaphragm priority) – works as usual;
4. M (manual) – aperture and flash are changed. Inaccuracy of exposure defining is indicated by expo-correction.