What do the numbers mean on a camera lens?
The first number or pair of numbers indicates the range of available focal lengths in millimeters. From this you can tell what angles of view the particular lens can handle. Lower numbers mean a wider angle. So an ordinary, basic 18-55 DSLR lens can “zoom” from medium-wide views out to the beginning of telephoto range.
What is lens value?
Abbe value is a measure of the lens material’s dispersion of light. A lens with a low Abbe value causes a higher dispersion and leads to unwanted chromatic aberration. Chromatic aberration is a distortion of the image due to the inability of the lens to focus all colors onto the same focal point.
What does 1 3.5 4.5 mean on a camera lens?
What does the ratio mean, you know the 1:1.8G or 1:3.5-4.5G? These numbers represent the lenses widest available aperture (smaller number = wider aperture). The wider the aperture the more light is let in + more bokeh.
Which is better CR 39 or polycarbonate?
In comparison to polycarbonate, CR-39 provides vastly superior optics, rating just one rung below the material with the highest ABBE value: crown glass. If you choose CR-39 lenses you commonly find that UV-protection comes at an added cost because, unlike polycarbonate, they aren’t inherently UV-protected.
What is SS in photography?
Shutter speed is the length of time the camera shutter is open, exposing light onto the camera sensor. Essentially, it’s how long your camera spends taking a photo. This has a few important effects on how your images will appear.
What does 1 1.8 mean on a lens?
This means that the diameter of the aperture is equal to the focal length divided by 1.8.
What does 1/4 mean on a lens?
It means that the ratio of the focal-length to aperture is f/4 at the wide end of the zoom and f/5.6 at the telephoto end. This is commonly done to saved weight and costs compared to a constant aperture zoom lens which simply has one ratio, say 1:4.
What do the numbers on camera lenses mean?
What do camera lens numbers mean? When comparing lenses, the two most important numbers are the focal length range and lens speed. Focal length range will be listed as XX-XX before the letters mm, (e.g. 18-55 mm). Lens speed or maximum aperture will be listed as some number immediately following the letter f. (e.g. f/2.8).
What is the most important specification for lenses?
The most important specification for most lenses is their focal length – in generic terms, how far “zoomed in” the lens is. Focal length is written in millimeters. Some lenses only have a single focal length.
What is the brand name of a camera lens?
Camera Lens Terminology Brand name, lens type, focal length (in mm), maximum aperture, other lens features/abbreviations. For example, the official name for one of Nikon’s professional zooms is the “Nikon AF-S 24-70mm f/2.8 E ED VR” lens. Canon’s equivalent is the “Canon EF 24-70mm f/2.8 L II USM” lens.
How many lenses do you need for your photography?
1 Ultra-Wide Angle Lenses – 10-15 mm 2 Wide Angle Lenses – 16-28 mm 3 Standard Lenses – 28-60 mm 4 Telephoto Lenses – 60-300 mm 5 Super Telephoto/Ultra Telephoto – 300mm and above