KCook wrote: Those roots are with full frame cameras. Field of view is too narrow on a crop body for general use.
Kelly
Technically correct, but people need a way of relating what they will get between different formats so call it what you want but there is an equivalent.garyrhook wrote:
<math and geometry nazi>
What he said. Crop factor and sensor size have no affect on focal length, which is fixed. There's no "equivalence".
</math and geometry nazi>
Shadowfixer1 wrote: but people need a way of relating what they will get between different formats
Shadowfixer1 wrote:
Technically correct, but people need a way of relating what they will get between different formats so call it what you want but there is an equivalent.garyrhook wrote:
<math and geometry nazi>
What he said. Crop factor and sensor size have no affect on focal length, which is fixed. There's no "equivalence".
</math and geometry nazi>
Scotty wrote:
Shadowfixer1 wrote:
Technically correct, but people need a way of relating what they will get between different formats so call it what you want but there is an equivalent.garyrhook wrote:
<math and geometry nazi>
What he said. Crop factor and sensor size have no affect on focal length, which is fixed. There's no "equivalence".
</math and geometry nazi>
Agreed. Everybody knows what you mean when you say it's this many mm's on crop. I'm just putting out information for education purposes.
I actually believe, (correct me if i'm wrong anybody), mm is measured by the distance between the rear element and the sensor?
hghlndr6 wrote:
Scotty wrote:
Shadowfixer1 wrote:
Technically correct, but people need a way of relating what they will get between different formats so call it what you want but there is an equivalent.garyrhook wrote:
<math and geometry nazi>
What he said. Crop factor and sensor size have no affect on focal length, which is fixed. There's no "equivalence".
</math and geometry nazi>
Agreed. Everybody knows what you mean when you say it's this many mm's on crop. I'm just putting out information for education purposes.
I actually believe, (correct me if i'm wrong anybody), mm is measured by the distance between the rear element and the sensor?
According to Nikon, it's not a measured distance but a calculated one. Didn't know that.
"Focal length, usually represented in millimeters (mm), is the basic description of a photographic lens. It is not a measurement of the actual length of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm film at the focal plane in the camera. The focal length of a lens is determined when the lens is focused at infinity.
The focal length tells us the angle of view—how much of the scene will be captured—and the magnification—how large individual elements will be. The longer the focal length, the narrower the angle of view and the higher the magnification. The shorter the focal length, the wider the angle of view and the lower the magnification."
www.nikonusa.com/en/Learn-And-Explore/Ar...ng-focal-length.html
Why? Here's why. I just purchased a mirrorless camera. I wanted a Fuji because I like Fuji images. I've been using Nikons for years and for 95% of what I do, I use the 18-200 VR lens. The reason I didn't buy the Fuji was they didn't one lens to cover what my 18-200 does. Olympus did so that is the system I bought into. People always want to compare behavior in the different formats. In fact that's always the first question to come up when discussing different formats. Sorry you don't understand this but it is true. If you don't want to know the equivalency, fine, but I don't see the need to try and correct someone when they talk about equivalent focal lengths because in the groups I speak to, that's one of the very first questions asked. When digital first came out, it was always the first question asked. I'm not trying to start an argument, I just don't understand the soapbox on this issue. Why does it matter if someone wants to know.garyrhook wrote: Since there'a trend of late for taking threads in new directions,
Shadowfixer1 wrote: but people need a way of relating what they will get between different formats
Why?
And how often do people really need to compare behavior in formats?
Since focal length can not change, ever, and it was the marketing departments of the manufacturers that instigated this nonsense, why do we continue to propagate something that is technically incorrect? Especially when, mathematically, it is impossible to produce identical results with 2 differently sized sensors?
Boy, I hope I don't have to pull out my "Stand back, I'm going to use math" t-shirt.
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