Napioa - Wind Origins

Napioa - Wind Origins
by octopus                

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2

It's an old question ( EG http://www.dpreview.com/forums/thread/2714173 ). The short answer is that it is most advantageous for Video, because when you zoom in everything doesn't get darker. For single frame Photos you can adjust ISO and Shutter speed (the automatic Setting will do it for you) on a shot by shot basis and get all Photos similar; in a Video ...


0

While not exhaustive, these are the terms for lens types I've run into: Prime vs. Zoom A prime lens is a lens with a fixed focal length. A zoom lens is a lens with a variable focal length. Simple as that. Wide, Normal, Telephoto These designations are about the focal length that the lens has: short, medium, and long, respectively. In full-frame ...


-1

First we need to define “normal” as to focal length. This is because wide-angle and telephoto are referenced from this value. All cameras can be fitted with a “normal” lens. Such a lash-up delivers an angle of view of about 45⁰. We are talking about a camera that yields a rectangular image. The 45⁰ angle of view results when the camera is held horizontal ...


2

Think of those as qualifiers, not types because they are not mutually exclusive: Relative to viewing-angle, lens can be called: Ultra-Wide, Wide-Angle, Normal, Telephoto, Super-Telephoto. These terms are not absolute either in that a lens can be wide-angle when mounted on one camera and normal or ultra-wide on another, depending if the sensor is relatively ...


0

Zooming in and cropping will enlarge the desired areas of the image, but so will getting physically closer to the subject. Taking pictures from too far away makes everything else more difficult. Of course there are times when you simply can't get closer, but getting closer is the way to go if you can do it.


0

What teleconverter are you planning to use with that lens? TCs can be quite picky about what lenses they work with, optically and even physically. I've got a Sigma 1.4TC which definitely isn't compatible with my other lenses bar the big telephoto I bought it for, other Sigmas included; elements would hit each other if they were mounted together. That said, ...


0

Zoom first, and crop second. You can't crop what isn't in the original image, but the zoom can get you that detail. Also, if you are not using your zoom much, why carry it around? Better to use a fixed focal length lens and have much better image quality. It does blow my mind that you are not interested in image quality. With a photograph, what else is ...


0

1800 mm lens is the right answer for the 20000 feet, but remember, this represents a 400 foot wide field, and the plane is traveling maybe 500 MPH. That's 733 feet/second, so it will cross the field of view in about 1/2 second, and it will be quite difficult to find it in the viewfinder in the first place. Nothing about it will be easy. You can buy a ...


7

Do some simple math: Assume the plane is 20000 feet away, and 200 feet long. Let's also assume you want to fill half the frame width (in a full-frame camera), which is 1/2 of 36 mm = 18 mm. With B/G*d = f (where B is the size in the picture, G the size of the object, and d its distance), you get: f = 18mm/200ft*20000ft = 1800 mm An easier to remember way ...


2

Is it really possible? Yes. For curiosity, what kind of equipment is needed? A very long focal length - or another plane.



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