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.