Tag: Camera

Lets review fixed tele-photo lens Tokina AF 100mm F2.8 AT-X M100 AF PRO D, that is released for full-frame and APS-C mounts of Canon and Nikon cameras. Its focus is equal to 100 mm, aperture can be set in f/2.8 – f/32 range ( it is lens of middle level light strength ) with use of 9 diaphragm blades, field of view is 24 degrees, minimal focusing distance is 0.3 m with macro ability and support of focusing on infinity ( with use of this lens there is ability to make photos of astronomical objects and of distant land objects ). Lens supports automatic and manual focusing and aperture control and does not support optical image stabilization ( which camera can perform by itself via sensor shifting, if it supports it ), there is ability to attach 55 mm optical filters to it. 9 lens elements in 8 groups are built into it ( this is relatively large amount for fixed lens ), they all are covered with protective and anti-reflective multi-coating. Its sizes are 73.66 ( diameter ) x 95 ( length ) mm, mass is 540 g, it is eligible to 2-years manufacturer’s warranty. Package contains : Tokina AF 100mm F2.8 AT-X M100 AF PRO D photo-lens itself, frontal and rear caps, storage and carrying case and user’s guide. In technical characteristics respect, this is a middle tele-photo lens with automatic focusing support, which is useful for photos and videos making ( especially if camera can perform image stabilization ). But, if there is no need in automatic focusing, then there is ability to buy tele-photo lens with similar characteristics at much lower price.

Lets review fixed wide angle photo-lens Pentax HD DA 21mm f/3.2 ED AL for Pentax K mounts. Its focus equals to 21 mm, diaphragm can be set in f/3.2 – f/22 range ( it is middle light strength lens ) with use of 7 diaphragm blades, it is designed for APS-C sensors and gives 68 degrees field of view with them. Minimal focusing distance is 0.2 m with auto-focusing support and without support of optical image stabilization ( which camera can perform itself via sensor shifting, if it has such function ). 8 lens elements in 5 groups are built into it ( it is relatively big their amount for fixed lens ), they all are covered with protective and anti-reflective multi-coating Pentax HD. 49 mm optical filters can be attached to it, its sizes are 63.5 ( diameter ) x 25.4 ( length ) mm, and mass is 119 g, it is released in 2 color variants : black and silver. Package contains : Pentax HD DA 21mm f/3.2 ED AL photo-lens itself, frontal and rear caps, carrying and storage case, 1 year warranty card and user’s guide. From one side : it is good lens with average glasses amount, average light strength, wide field of view and auto-focusing support, but from the other side : its price is quite big ( 390 USD in the middle of Autumn 2015 ). So, it should be bought only for auto-focusing with such focal distance, but if it is not needed, then it is better to buy other lens and use it via adapter or converter.

Lets meet in optics part today with compact standard photo-lens Sony SEL-20F28 for Sony E mounts. Its 20 mm focus is fixed, diaphragm can be set in f/2.8 – f/16 range ( it is relatively light lens ) with use of 7 diaphragm blades. It is designed for APS-C sensors and gives 70 degrees field of view with them, minimal focusing distance is 0.2 m, it does not support automatic focusing and optical image stabilization ( which camera can perform by itself via sensor shifting, if it supports such function ). 6 lens elements in 6 groups are built into it, among them 3 are aspherical for chromatic and geometric distortions reduction, they all are coated with protective and anti-reflective multi-coating. 49 mm optical filters can be attached to it, its sizes are 62.6 ( diameter ) x 20.4 ( length ) mm, and mass is 69 g.

Package contains : Sony SEL-20F28 photo-lens itself, frontal and rear caps, protective and carrying case and user’s guide. All in all, this is a good fixed photo-lens with small glasses amount, aspherical lens elements, relatively high light strength and big field of view; it is more oriented to photos making, because it does not support automatic focusing and optical image stabilization ( which camera can perform by itself, if it supports it ), but experienced photographers can use it for videos recording also.

Lets review fixed light photo-lens Nikon AF Nikkor 85mm f/1.8D for Nikon F mounts. Its 85 mm focus is fixed, diaphragm is set in f/1.8 – f/16 range with use of 9 diaphragm blades, it is designed for 35 mm full-frame ( with 28 degrees 30 minutes field of view ) and APS-C ( with 18 degrees 50 minutes field of view ) sensors, minimal focusing distance is 0.85 m. It supports automatic focusing and does not support optical image stabilization ( which can be performed by camera itself via sensor shifting, if it supports it ). 6 lens elements in 6 groups are built into it ( it is adequate amount for fixed lens ), they all are coated with protective and anti-reflective Super Integrated Coating. 62 mm Screw-on optical filters can be attached to it, lens sizes are 71.5 ( length ) x 58.5 ( diameter ) mm, and its mass is 380 g. Package contains : Nikon AF Nikkor 85mm f/1.8D photo-lens itself, frontal and rear caps, carrying and storage case and user’s guide. It is good fixed light photo-lens with small lens elements amount ( for light dispersion and internal reflections on optical surfaces amount reduction ), it supports auto-focusing and is useful for photos making and videos recording ( especially if camera supports optical image stabilization ) by novice and experienced photographers.

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.