:( 3 ) Long focus lenses have small fields of view and aberrations on axis are very important.
Very long focus lenses may require that the camera be fitted with special extra-long rails and bellows.
Spielberg used a long focus lens to make it appear the actors were closer to the propeller than they really were.
On the other hand, long focus lenses reduce such exaggerations, depicting far-off objects as seemingly close together and flattening perspective.
Framing the same subject identically while using a moderate telephoto or long focus lens ( with a narrow angle of view ) flattens the image to a more flattering perspective.
A 300 mm lens on a camera with a 1.6 crop factor delivers images with the same FOV that a 35 mm film format camera would require a 480 mm long focus lens to capture.
Riefenstahl's techniques such as moving cameras, aerial photography, the use of long focus lenses to create a distorted banned from being shown in Germany owing to its support for Nazism and its numerous portrayals of the swastika.
At the 31st Chaos Communication Congress, hardware hacker starbug presented how DSLRs with high resolution and equipped with a long focus lens can be used to capture images of hands, or more specifically, fingers in order to use them for spoofing.
Compression, long-lens, or telephoto distortion can be seen in images shot from a distant using a long focus lens or the more common telephoto sub-type ( with an angle of view narrower than a " normal lens " ).