Tag: Lens

Lets review standard light lens Yongnuo EF YN 50mm F/1.8 for Canon EF mounts. Its 50 mm focus is fixed, diaphragm can be set in f/1.8 – f/22 range with use of 7 diaphragm blades, its field of view is 46 degrees and minimal focusing distance is 0.45 m. It supports automatic and manual focusing and does not support image stabilization ( which can be performed by camera itself, if it supports it ). 6 lens elements in 5 groups are mounted into it, they all are covered with protective and anti-reflective multicoating. There is ability to attach 52 mm optical filters to it, its sizes are 73 ( diameter ) x 55 ( length ) mm, and mass is 120 g. Package contains : Yongnuo EF YN 50mm F/1.8 photo-lens itself, frontal and rear caps, 52 mm thread frontal cap and user’s guide. It is good standard photo-lens with adequate lens elements amount, high light strength and automatic focusing support, which costs much less, than Canon prime lenses. It will be useful for photos and videos making ( especially if camera supports image stabilization ) by novice and experienced photographers.

Lets review in optics area compact prime photo-lens Pentax HD Pentax DA 40mm f/2.8 for Pentax K mounts. It is notable by its small sizes and mass and small amount of lens elements. Its 40 mm focus is fixed ( with support of automatic and manual focusing ); diaphragm can be set in f/2.8 – f/22 range with use of 9 diaphragm blades, it is controlled by camera or manually; it is designed for Pentax APS-C optical sensors, with them it has 39 degrees field of view. Minimal focusing distance is 0.4 m, there is ability to attach 49 mm optical filters to it and it does not support optical image stabilization ( which camera perform by itself by sensor shifting, if it supports such function ). It has 5 lens elements in 4 groups, they all are covered with protective and anti-reflective multicoating. Its sizes are 63.5 ( diameter ) x 15.24 ( length ) mm, mass is 88 g, it is produced in 2 color variants : black and silver. Package contains : Pentax HD Pentax DA 40mm f/2.8 photo lens itself, frontal and rear caps, storage and carrying case and user’s guide. All in all, this a good photo lens with compact sizes, small mass, small glasses amount, automatic focusing and electronic diaphragm control ability, so it is good fit for videos recording ( especially if camera can perform image stabilization ) and photos making by novice and experienced photographers.

Lets meet with entry level tele-photo lens Sony Alpha SAL85F28 85mm f/2.8. Its 85 mm focus is fixed, diaphragm can be set in f/2.8 – f/22 range with use of 7 diaphragm blades; it is attached to camera via Sony A mount. Field of view with 35 mm full-frame sensors is 29 degrees, with APS-C sensors : 19 degrees. Objective lens supports automatic focusing with use of Smooth Autofocus Motor ( SAM ), which is useful for videos recording; and does not support optical image stabilization ( which camera can perform by itself via sensor shifting, if it supports such function ). Minimal focusing distance is 0.6 m. It has only 5 lens elements in 4 groups, this reduces light dissipation and internal reflections amount, all glasses are covered with protective and anti-reflective multicoating. There is ability to attach 55 mm optical filters to it; its sizes are 52.1 ( length ) x 70.1 ( diameter ) mm, and mass is 173 g. Package contains : Sony Alpha SAL85F28 85mm f/2.8 photo-lens itself, frontal and rear caps, carrying and storage case and user’s guide. This is good entry-level tele-photo lens with small glasses amount and auto-focusing, which can be used for video recording, if camera supports image stabilization, and which fits very well for photos making by novice and experienced photographers.

Lets review photo lens Sony SEL50F18 50mm f/1.8 for Sony E mounts. It is light objective lens with 50 mm fixed focus and f/1.8 – f/22 diaphragm, which is set by 7 diaphragm blades. With APS-C sensor field of view is 32 degrees, minimal focusing distance is 0.39 m, lens supports optical image stabilization Optical SteadyShot and automatic focusing with use of silent motor, which is very convenient for videos recording. It has 6 lens elements in 5 groups, they all are covered with protective and anti-reflective multicoating. There is ability to attach to it 49 mm optical filters; its sizes are : 62 x 62 mm, and mass is : 202 g. It is produced in 2 color variants : black and silver, its body is made from aluminum. Package contains : Sony SEL50F18 50mm f/1.8 photo lens itself, frontal and rear caps, lens hood and user’s guide. All in all, it is good light photo lens with small amount of glasses ( for light dispersion and internal reflections reduction ), automatic focusing, image stabilization and support of manual focus and diaphragm settings, so, it will be useful for novice and experienced photographers for photos shooting and videos recording.

Lets devote today’s optics area to very light photo lens Rokinon 85M 85mm f/1.4. It is produced in variants for following cameras’ mounts : Micro Four Thirds ( Panasonic and Olympus cameras ), Canon, Fujufilm X-Mount, Nikon F, Nikon AE, Pentax, Samsung NX, Sony A-Mount and Sony E-Mount. Its 80 mm focus is fixed, aperture can be set in f/1.4 – f/22 range; focusing ( it is internal and does not alters lens length ) and aperture settings are manual. Minimal focusing distance is 1 m; field of view is 28.3 degrees; there is ability to attach to it 72 mm optical filters; it can work with full frame 35 mm optical sensors. Photo lens has built-in 9 lens elements in 7 groups, one of them is aspherical for chromatic and geometric aberrations correction; all optical surfaces are covered with protective and anti-reflective multicoating. Objective lens sizes are : 78 ( diameter ) x 99.5 ( length ) mm; mass is : 565 g. Package contains : Rokinon 85M 85mm f/1.4 photo lens itself, frontal and rear caps and user’s guide. Its is very good light photo lens, which is produced in variants for majority of mounts of modern cameras and which has adequate price. For novice photographers and for video recording difficulties can be caused only by lack of auto focusing, electronic diaphragm settings and image stabilization ( which can be performed be camera itself, if it supports such function ). So, this photo lens is the most suited for experienced photographers.

Lets meet with Zenitar 50mm f/2 standard photo lens for M42x1 mounts, which is produced by Russian plant KMZ. With adapters and converters it can be attached to any modern camera mount and it will allow to get excellent photos, due to low lens elements amount and chromatic and geometric aberrations correction. Its 50 mm focus is fixed; its aperture can be set in f/2 – f/16 range – it is light lens, aperture is controlled via 6 diaphragm blades; field of view is 45 degrees; and minimal focusing distance is 0.35 m. 6 lens elements in 6 groups are built into it, all of them are covered with protective and anti-reflective multicoating. Lens can work with 24 × 36 mm optical sensors, optical filters can be attached to it via M46×0.75 mount. It does not support auto-focusing and image stabilization ( however, camera itself can perform it via sensor shift, if it supports it ). Lens mass is 190 g, sizes are : 45 ( length ) x 65 ( diameter ) mm. Package contains : Zenitar 50mm f/2 photo lens itself, frontal and rear caps and user’s guide. This is a great objective photo lens, with which high-quality photos can be obtained, and, accounting its price, it has no competitors. Difficulties can be caused only by lack of auto focus and image stabilization for novice photographers and for video recording. So, it will be the most useful for experienced photographers.

Lets meet with tele-photo objective lens Rokinon 800M-B 800mm F/8.0, which is designed for T-mount ( there are adapters on it for all modern cameras’ mounts types ). It has fixed 800 mm focus and f/8.0 diaphragm; lack of automatic focusing and image stabilization and lens and mirrors optical scheme of Maksutov-Kassegrene telescope with 8 elements in 8 groups. All lens elements are made from low-disperse optical glass and are covered with protective and anti-reflective multi-coating. Field of view of lens is 3 degrees, there is ability to attach to it 105 mm optical filters, it can work with full-format 35 mm optical sensors and its minimal focusing distance is 3.35 m. Objective lens weight is 936 g, sizes are : 111 ( diameter ) x 114.3 ( length ) mm. Package contains : Rokinon 800M-B 800mm F/8.0 photo lens itself, frontal and rear caps, carrying and storage pouch and user’s guide. It is very good objective lens, which also can be used as telescope and which has adequate price. Wherein : fixed focus and diaphragm, lack of automatic focusing and image stabilization ( it can be performed by camera itself via sensor shifting ) can be inconvenient for novice photographers or for video recording, but for professional photos of long-distance land objects and astronomical objects this lens is very good.

Lets review wide-angle photo lens Sigma 19mm f2.8 DN. It is produced in variants for Micro Four Thirds ( for Panasonic and Olympus cameras ) and Sony E mounts. Its focal length is fixed and equals to 19 mm, diaphragm can be set in f/2.8 – f/22 range with use of 7 blades. Minimal focusing distance is 0.2 m, field of view is 59.3 degrees for Sony E mounts and 1:7.4 maximal magnification. Lens supports auto focusing and internal focusing; motor, that moves optics, is quiet and lens is useful for videos recording. It has 8 lens elements in 6 groups ( 3 of them are aspherical for chromatic and geometric distortions correction ), all elements are coated with Super Multi-Layer Coating. 46 mm optical filters can be attached to it. Lens sizes are : 60.8 ( diameter ) x 45.7 ( height ) mm; weight is : 160 g. It is released in black and silver color variants. Package contains : Sigma 19mm f2.8 DN photo lens itself, frontal and rear caps, storage and carrying case and user’s guide. All in all, this is a high-quality wide-angle lens, which is useful for photos and videos recording and which has optimal price. Its minus is relatively big amount of lens elements for fixed focus lenses, but most of them have around so amount of glasses.

Lets review objective photo lens Opteka 12mm f/7.4 HDMC Fisheye Lens for Sony E mounts. As it is seen from its name, it has 12 mm focal distance; f/7.4 fixed diaphragm, because of this it is not very light; field of view is 167 degrees; and minimal focusing distance is 0.28 m. It has 4 lens elements in 4 groups, all of them are made from optical glass and are covered with protective and anti-reflective multicoating. Objective weight is 198 g, and sizes are : 65 ( height ) x 57 ( diameter ) mm. Also, there are variations of objective lens with f/8 diaphragm and 7.5 mm ( for Nikon 1 mount ) and 9 mm ( for Micro Four Thirds mount for Panasonic and Olympus cameras ) focal distances. Package contains : Opteka 12mm f/7.4 HDMC Fisheye Lens objective photo lens itself, frontal and rear caps, carrying and storage pouch and users guide. All in all, it is a good photo lens with adequate price, low optical elements amount ( this reduces light dispersion and internal reflections on surfaces ) and variations for different mounts. Its light strength is relatively low, but it is inherent to all fish-eye lenses, because they gather light with the same input lens diameter for much larger field of view.