New answers tagged focal-length
I would use a 50 on your crop sensor cameras, it will give you a good position and good range to get a variety of shots from different distances as the model walks. The 50mm will in fact be around 70mm on your camera. The 35mm has some level of distortion compared to the 50mm so if you are not prepared to adjust this afterwards somehow then a 50 would be ...
On a APS-C Camera (as your Nikons are) I would recommend you 35mm (KB 56mm) if you want to have a "normal" (like eyes see) looking image. With 50mm (KB mm) you will get a light tele-zoom effect. On full-frame camera take 50mm.
The original Canon EF 24-70mm f/2.8 L is sharpest at the plane of focus at 24mm and f/2.8 when tested on a Canon 5D Mark II. Stopping down yields very little increase in center sharpness and results in slightly softer mid-frames and corners (at the absolute point of focus.). As you move from 24mm to 70mm the edges get progressively softer. Of course at f/2.8 ...
The minimum and maximum focus distances have no direct relation to the focal length of the lens. All lenses have a minimum focus distance. For Macro lenses this is closer than for normal lenses (is the main part of what makes them Macro). The majority of lenses have an infinite maximum focus distance (focus at infinity). Under certain conditions ...
Your question makes no sense. The max distance for all normal lenses is infinity. The focal length will only determine the view angle at infinity, not whether you can reach infinity or not.
Putting aside some of the details of this and strictly speaking, shooting something that is 0.15 m tall and 500 meters away on a full-frame camera will require a nearly 100,000mm long lens (which doesn't exist, or at least isn't generally available). Two lines of text tall might be 0.3 m and needs a 53,000mm focal length (which doesn't exist). Ten lines of ...
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