Tag: Lens

Lets review Nikon Nikkor 2137 50mm f/1.8D prime lens for Nikon F mounts. As it can be seen from its name, it has 50 mm fixed focus and maximal and minimal apertures f/1.8 and f/22, accordingly, with 7 diaphragm blades. It has 46 degrees field of view for 36 mm FX sensors and 31 degrees 30 minutes for smaller DX sensors; minimal focusing distance is 0.45 m with support of automatic and manual focusing. It has 6 lens elements in 5 groups, they all are coated with protective and anti-reflective Super Integrated Coating. 52 mm optical filters of Screw-on standard can be attached to it. Objective sizes are 63.5 x 39 mm and weight is : 155 g. All in all it is good objective lens with fixed focus, small lens elements amount and auto focus function, which costs affordable amount of money, in comparison with other objective lenses. Nikon Nikkor 2137 50mm f/1.8D Auto Focus can be recommended to novice and experienced photographers, who want to capture beautiful and clear portrait and panorama photos without zoom.

Lets study Panasonic Lumix G 20mm / F1.7 II ASPH objective lens with 20 mm fixed focus for Micro Four Thirds mounts. Its diaphragm is set in F1.7 – F/16 range with use of 7 blades; minimal focusing distance is 0.2 m; field of view is 57 degrees. There are 7 lens elements in 5 groups set in the objective, 2 of them are aspherical ( to reduce image geometrical and color distortions ); all lens are covered with protective and anti-reflective multicoating. There is ability to attach 46 mm optical filters to it; objective lens sizes are 63 x 25.5 mm, its weight is : 87 g; its body is made from metal, which increases its durability and reliability. It has no image stabilization functions and have automatic focusing with use of built-in motor. Package contains : Panasonic Lumix G 20mm / F1.7 II ASPH objective lens itself, front and back caps, lens storage bag and user’s manual. There is need to note, that this objective lens can be used not only with Panasonic cameras, but with all other cameras, that support Micro Four Thirds mounts, for example, Olympus.

Lets continue our study of Russian-made photo objective lens with MC APO Telezenitar-M 2.8/135. As it follows from its name, it is apochromatic ( it has corrected spherical aberrations ( geometrical image distortions ) and chromatic aberrations ( color image distortions ) for 3 or more light waves lengths ); has 135 mm fixed focal distance and 1/2.8 – 1/22 diaphragm. They were developed in KMZ plant in the beginning of 1980ties and their industrial productions started in 1983 year; also, modifications of objective lens were produced by other companies. Field of view of objective lens is 18 degrees, frame sizes are 24 × 36 mm, and minimal focusing distance is 1.3 m. There are 5 lens elements in 4 groups set in it, all of them are covered with protective and anti-reflective multicoating. MC APO Telezenitar-M 2.8/135 attaches to camera via M42×1 mount, with use of adapters and converters it can be attached to modern cameras with other bayonets formats. Objective lens sizes are : 83 x 66.5 mm, and weight is : 430 g. All in all : it is very good objective lens; it has no automatic focusing and diaphragm control and they should be set manually via control rings, because of this this lens can be advised for experienced photographers or to those, who want to dive in this area. It has small amount of lens elements and because of this it is far more superior in image quality area, than zoom-objecte lenses with simillar characteristics. Also, it is light weight ( for tele-objective lens ) and it is convenient to shoot photos from hands with it and wear camera in trips. Currently these objective lenses are rare in shops and they can be bought via private ads in conditions from “new one” to “with marks of use”.

Lets review wide angle objective lens KMZ Mir-20, it was produced by KMZ plant from 1973 year to 1992 year and by other plants, now it can be bought through private ads in conditions from “new” to “with marks of use”. It has 20 mm fixed focus and field of view 96 degrees; 1/3.5 – 1/16 diaphragm; 24 × 36 mm frame size; and minimal focusing distance 0.18 m. Objective lens has 9 lens elements in 8 groups with enlightened optics or with protective and anti-reflective multi-coating, depending on objective lens modification. KMZ Mir-20 is attached to camera via M42×1 mount, using different adapters and converters it can be attached to cameras with different mounts standards. It has no automatic focusing and diaphragm control, so they should be set manually with use of control rings. Because of this it most suitable for experienced photographers, who know which settings to use in different situations. Optical filters can be attached to objective lens from back side with use of M28×0.75 mount. All in all it is very good objective lens, accounting its low lens elements amount and their high quality ( in USSR and in Russia optics production takes its roots in military area and quality of production is very high ), it is far more superior, than zoom objective lenses with similar characteristics; and taking into account its low price ( especially when it is bought through private ads ) it is very competitive with other fixed focus wide angle lenses.

Lets review extra-wide angle objective lens ( “fish eye” ) Zenitar 2,8/16, that is produced in Russia. It was developed and now is manufactured by «Krasnogorskiy Plant of S.A. Zverev» for following bayonets : M42×1, Nikon, Pentax and Canon, it also can be used with other mounts via adapters and converters. It has 180 degrees field of view, 16 mm focal length, maximal and minimal apertures : f/2,8 – f/22 ( with 6 diaphragm blades ), frame size : 24 × 36 mm, and minimal focusing distance is 0.3 m. To obtain optimal results, there is need to use full-frame cameras, otherwise field of view will be cut near the edges. It has 11 lens elements in 7 groups, all of them are coated with multilayer protective and anti-reflective coating. Objective lens does not have automatic focusing and image stabilization; they would not work any way with adapters and converters; so, this lens is appropriate for experienced photographers, which know which settings to use for different scenes. It has great picture quality at the center and strong geometrical distortions at the edges ( they are inherent for all objective lens of this type ). Zenitar 2,8/16 has fixed focus and small amount of lens elements, so by image clarity, sharpness and lightness it is far more superior, than standard zoom objective lens of cameras. Wherein it has much smaller price, than other competing extra-wide angle objective lens.

Nikon released new telephoto zoom objective lens Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR. It has Nikon F-Bayonet mount and 200 – 500 mm minimal and maximal focal distances with minimal and maximal apertures of f/5.6 and f/32, accordingly. Its minimal and maximal fields of view for DX and FX sensors are : 8 degrees and 3 degrees 10 minutes and 12 degrees 20 minutes and 5 degrees, accordingly. Minimal focus distance is 2.2 m with automatic, manual and semi-automatic focusing with internal focusing mechanism. It is powered by AF-S ( Silent Wave Motor ). Image stabilization is performed by Vibration Reduction technology. Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR has 19 built-in lens elements in 12 groups, among them 3 are low-dispersion lens elements from ED glass. All lens are coated with protective and anti-reflective Super Integrated Coating. Diaphragm is controlled with use of Electromagnetic Diaphragm Mechanism, there are 9 diaphragm blades in objective lens. There is ability to attach to it 95 mm optical filters of Screw-on standard. Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR objective lens sizes are : 108 x 267.5 mm, and its weight is : 2300 g.

Nikon announced new zoom objective lens Nikon AF-S NIKKOR 24-70mm f/2.8E ED VR. As it follows from its name : it has 24 – 70 mm focal distances and Nikon F bayonet mount. It can magnify up to 2.9 times and its maximal and minimal apertures are : f/2.8 и f/22, accordingly; it is developed for large FX ( 35 mm ) sensors. Its maximal and minimal fields of view are : 61 degrees and 22 degrees 50 seconds for DX format sensors and 84 degrees and 34 degrees 20 seconds for FX format sensors, accordingly. It has 20 lens elements in 16 groups; 1 is High Refractive Index lens element ( which works as many usual lens and reduce field curvature and spherical aberrations ), 2 lens elements are produced from ED low disperse glass and 3 are aspherical lens elements, which reduce color aberrations.

All lens are coated with Fluorine Coat, Super Integrated Coating and Nano Crystal Coat anti-reflective and protective coatings. There is ability to attach to it 82 mm optical filters of Screw-on standard. Objective lens supports manual, automatic and semi-automatic focusing with internal focusing functions. It has built-in Vibration Reduction image stabiliztion mechanism and AF-S ( Silent Wave Motor ). Minimal focusing distances are 38 – 41 cm, depending on selected optical zoom level. Objective lens sizes are : 88 x 154.5 mm, and its weight is : 1070 g. Nikon AF-S NIKKOR 24-70mm f/2.8E ED VR will be available in shops from 24th October of this year.

Nikon announced new light-weight wide-angle lens Nikon AF-S NIKKOR 24mm f/1.8G ED. Its focal lens is 24 mm with max apperture f/1.8 and minimal apperture f/16, it is attached to cameras with use of Nikon F-Bayonet mount. Angles of view are : 61 and 86 degrees for DX ( 24 x 16 мм ) and FX ( 36 x 24 мм ) sensors accordingly. Minimal focus distance is 23 cm with automatic and manual focusing modes, automatic focusing is provided via AF-S ( Silent Wave Motor ). Optical filters with 72 mm size and Screw-on type can be attached to lens. It contains 12 lens elements in 9 groups; among them : 2 low-disperse lenses, manufactured from ED glass, and 2 aspherical lenses; they reduce light dispersion and other optical distortions. All lenses are coated with Nano Crystal Coat anti-reflective coating and Super Integrated Coating protective coating. Objective lens weight is 355 g, its sizes are : 77.5 x 83 mm. It is suited most for landscapes, towns squares, sportive events and other scenes shooting, which require wide angle of view. Nikon AF-S NIKKOR 24mm f/1.8G ED will be available in shops from 17th September.