Essentially, the wider the field of view, the smaller in focal length number. ... So a 12mm lens will give you the equivalent field of view of a 24mm lens on a full frame 35mm camera. But nonetheless, the standard stays the same. The smaller the number of millimeters, the wider the field of view and focal length.Mar 1, 2018
What mm lens is best for what?
Photography Type Best Lens Type to Use Lens Recommendation
---------------- --------------------------------- ----------------------------------
Landscape Wide-angle lens Canon EF-S 10mm-22mm f/3.5-4.5 USM
Wedding Prime lens Sigma 50mm f/1.4 DG HSM ART
Sports Prime lens Canon EF 400mm f/2.8L IS II USM
Wildlife Super telephoto or telephoto lens Nikon 70-300mm f/4.5-5.6G VR
What is the most common lens size?
For a 35mm camera with a diagonal of 43mm, the most commonly used normal lens is 50mm, but focal lengths between about 40 and 58mm are also considered normal.
What does lens diameter mean?
The diameter of a contact lens is the width of the lens from edge to edge. It is also expressed in millimetres. This number is usually between 13 mm and 15 mm, though it can be as small as 9mm if a rigid gas-permeable lens, and it determines where the lens will sit in your eye.
Are all lens caps the same size?
There are no standard sizes for those types of lenses. No. Lens caps are not universal, although many are interchangeable. For most lenses with a thread and no built-in hood, all you need to know is the thread-size and you can buy a cap of the same type and diameter.Mar 23, 2017
What size lens cap do I need for a 50mm lens?
49mm Snap-On Lens Cap for Canon EF 50mm f/1.8 STM Lens.
How do I know my lens cap size?
https://www.youtube.com/watch?v=RH0sGdkE_NA
Is lens cap size the same as filter size?
To order a lens cap to fit your lens, you need to know the filter size for your lens. ... Thus, if your lens has a 58mm filter thread, you need to purchase a 58mm lens cap. Sometimes the filter ring size is marked on the front of the lens.
Are Canon lens caps universal?
Canon has established itself as one of the best lens manufacturers. ... They provide unique caps for all their lenses.
Do pros use lens caps?
There are plenty of pros earning their livings today with Canon 10Ds and Nikon D70s. A pro is a pro because he's in this to make a profit, not to buy more gear. Pros work too fast for lens caps. They use protective filters, and then usually just throw their filtered lenses in their bag.
What is the purpose of lens caps?
A lens cover or lens cap provides protection from scratches and minor collisions for camera and camcorder lenses. Lens covers come standard with most cameras and lenses.
Do you need rear lens caps?
A snap-on lens cap fits inside the filter ring of the lens and must fit the lens size exactly to snap into place—it is sized to the same diameter of your filter ring diameter. ... If you do not plan on changing your lenses, a rear lens cap might not be necessary, since that rear element will never be exposed.