you will see the mm used twice on most lenses. One is just the diameter of the front element/filter size.
the important one is the focal length. which impacts the field of view and reach of the lens. In film camera equivalents under 40 mm is the wide to ultra wid FoV , 40-60 is the range considered "normal" meaning it approximates what we see with our eyes, 60 and up are telephoto which have a narrower FoV and magnify giving closer view of distant scenes.
You need to buy an adaptor. Make sure you specify exactly the type of lens and exactly the camera you want to attach it to. Don't forget that there will be a large increase in magnification, i.e. your 35mm lens will give more telephoto effect on a 16mm camera. It is unlikely that the automatic functions (aperture, focus) of the lens will be carried into the 16mm camera.
The "mm" in a camera lens refers to the focal length of the lens, which determines the angle of view and magnification of the image.
2.4 mm All kidding aside: the 3.5mm lens has a wider angle than the 6mm one. This means that in a picture, you will see a larger area with the 3.5mm lens, but with the 6mm lens you'd see more (sharper) detail.
In standard film camera reference which is commonly used, a 50 mm lens equals a neutral value, or 1x magnification, so a 12x lens would be 600 mm.
It depends on the actual focal length. For a 35 mm format lens, 200 mm is about 4x magnification, to get 20x you'd need a 1000 mm lens. For smaller formats, such as 8 mm or a camcorder, find the focal length for normal view, then multiply by 20.
"mm" on a camera lens refers to the focal length of the lens, measured in millimeters. It indicates how much the lens can zoom in or out, with larger numbers representing a longer zoom or telephoto lens, and smaller numbers indicating a wider angle or wide-angle lens.
Since you didn't specify the make of the lens, look at the lens end where the front element is. Look at the numbers on the area where the focal length is shown for a symbol that resembles a circle or elipse with a diagonal line running through it (it's the symbol for 'diameter'). After that symbol should be a number followed by "mm". That should be the lens thread mount size.
Both are good for different purposes.
A higher mm lens in camera photography means that the lens has a longer focal length, which allows you to zoom in closer to distant subjects and capture more detail.
The term "300 mm lens" in photography refers to a lens with a focal length of 300 millimeters. This type of lens is typically used for capturing distant subjects or for close-up shots with a narrow field of view.
The answer depends on what the 65 mm refers to: the radius of the diameter. Please specify.
With 35 mm film cameras, the 35 mm refers to the film size, not to be confused with the lens size. A 50 mm lens is usually considered the normal or neutral size, with a magnification factor of one. A 50 mm lens has no magnification. So, as the size (millimeters) of the lens become larger, the magnification of the image becomes greater. A 100 mm lens gives 2 times magnification, and makes the subject appear 2 times closer and gives less viewing area; a 200 mm lens gives 4 times magnification, and so on. A 25 mm lens would make the subject look farther away by a factor of 2 and give a wider viewing area. Fisheye lenses, usually about 8 to 15 mm, give a very wide view and negative magnification. The increased area appears as a distorted "fisheye" view. Digital cameras have electronic image sensors which are usually smaller than the area of film exposed in a 35 mm camera, and lenses will have a different magnifing effect. It is not a problem, though, as the manufacturer almost always gives a calculation of the equivalence of the lens with the digital camera compared to a 35 mm film camera, and calculates the magnification of the lens of the digital camera.