Why PRIME ?
Dec 6, 2019 11:41:50 #
Dec 6, 2019 11:45:15 #
melismus
Loc: Chesapeake Bay Country
Not a measure of quality. A prime lens is a single focal length, not a zoom.
Dec 6, 2019 11:45:27 #
Dec 6, 2019 11:48:40 #
Prime refers to the lens being a fixed focal length. As in not a zoom. It has nothing to do with who made it or the family of lenses. Prime lenses tend to be of higher image quality because their design is required to do only one thing. In zooms, the lens is a compromise in design from the least to the most focal length.
Dec 6, 2019 11:52:26 #
Dec 6, 2019 11:55:45 #
RWR wrote:
Why is a lens called a lens?
From Google: The word “lens” came from the Latin name of the lentil plant. The scientific name of the lentil we most commonly eat is Lens culinaris. It was named after the legume because double-convex lenses look just like lentils.
Dec 6, 2019 12:12:35 #
RWR wrote:
Why is a lens called a lens?
Because "shaped and polished chunk of glass that focuses light" is too long and awkward.
Dec 6, 2019 12:12:59 #
Hasviolin wrote:
How does a lens acquire the designation PRIME? Manufacturer, vendor, or user consensus?
It's like your parents giving you a name. It's available and up for grabs. There's Amazon Prime, and there are several companies that have "Prime" in their name. Now if you're talking about lenses, a prime lens is one that does not zoom - it has just one focal length. It will have more reach - narrower field of view - on a crop sensor, but it's still the same focal length.
Maybe this topic isn't ready for Prime Time.
Dec 6, 2019 12:27:16 #
JohnSwanda wrote:
From Google: The word “lens” came from the Latin name of the lentil plant. The scientific name of the lentil we most commonly eat is Lens culinaris. It was named after the legume because double-convex lenses look just like lentils.
Oh boy, now I've heard it all. Legumes, sheesh.
Dec 6, 2019 12:54:10 #
Bob Mevis wrote:
Oh boy, now I've heard it all. Legumes, sheesh.
Plug this into Google and see what you get.
lens etymology
Dec 6, 2019 20:35:53 #
Bob Mevis wrote:
Oh boy, now I've heard it all. Legumes, sheesh.
Aka Pulses . . .
Dec 7, 2019 06:49:43 #
RWR wrote:
Why is a lens called a lens?
Because lawns was already taken.
Dec 7, 2019 07:58:32 #
"How does a lens acquire the designation PRIME? Manufacturer, vendor, or user consensus?"
A prime lens is a lens that uses only one focal length. A zoom uses different focal lengths. Manufacturers, vendors and users refer to them as primes.
A prime lens is a lens that uses only one focal length. A zoom uses different focal lengths. Manufacturers, vendors and users refer to them as primes.
Dec 7, 2019 08:07:19 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
Hasviolin wrote:
How does a lens acquire the designation PRIME? Manufacturer, vendor, or user consensus?
A prime is most any NON-zoom lens. A 14,18,20,24,28,35,50,85,200,300,400,500,600, and 800mm lenses are examples of PRIME lenses.
Prime lenses usually out preform zoom lenses, however, that said, there are a lot of very sharp zoom lenses out there that compete very well with optical quality with Prime lenses.
Nikon 70-200 2.8, 14-24 2.8, 24-70 2.8 are just a few lenses that compare very well with prime lenses.
Dec 7, 2019 08:54:02 #
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