Do telephoto lens perceive action as faster slower or ...?

[funkyfresh123]

When using telephoto lenses, actions coming towards the camera apperas faster, yes? or does it not change or about the same

 

[KmH]

Essentially, it is the same, but because a telephoto lens has a smaller field-of-view (FOV) it does appear to happen faster, but takes the same amount of time as with less focal length. How much faster it appears depends on the angular size of the FOV the lens delivers.

However, the ability of shutter speed to stop motion is greatly affected by the direction motion is to the image sensor plane.

Motion perpendicular to the image sensor requires less shutter speed to stop than does motion parallel to the image sensor plane. with motionm diagonal to the image sensor plane being between the 2 extremes.

 

[RacePhoto]

When using telephoto lenses, actions coming towards the camera apperas faster, yes? or does it not change or about the same

KmH covered it well. I'd say slower, straight at you. You have compression of the movement as an object is coming towards you. So slower. If it's sideways, start figuring angles matter about this point, then it's faster.

Slower towards you, faster when across you or panning.

Depth of field coming towards you is changing and thin, going across, perfectly perpendicular, it's the same.

Here's an interesting artifact, when you pan with a telephoto the front and back (left and right if an object is going right to left) will be out of focus. The center can be perfectly in focus. Your depth of field is that short area that the center is spot on, while left and right are beyond sharp.

The center is sharp, the edges are slightly out of focus. The background is blurred from the pan, but the number 8 is dead center and focused. Not that all shots will work this way, but this is the optimum.

For me, green car, green grass, that's cool!

 

[djacobox372]

Slower. Due to the compression of space. Even in side to side motion the speed will seem slower due to the distant background being perceived as closer then it is.This is assuming the same framing if the subject.

 

[RacePhoto]

Slower. Due to the compression of space. Even in side to side motion the speed will seem slower due to the distant background being perceived as closer then it is.This is assuming the same framing if the subject.

If you shoot a moving object going across your field of view with a 50mm, then a 100mm then a 200mm and last a 400mm, you will have to pan much faster to keep up with something at the same distance, because it's moving across a smaller field of view. Faster!

Yes, if the subject is the same framing, it would appear to move the same relative speed.

Think of a record. (remember what those are?) The outside of the record is traveling the same RPM as the inside grooves. But aha ha, the surface speed is different on the outer grooves than the inner grooves! The outside travels faster, in feet per second for example, than the inside.

I believe everyone agrees that something approaching or receding will appear slower due to telephoto compression.

 

[clanthar]

I believe everyone agrees that something approaching or receding will appear slower due to telephoto compression.

No. The perception of motion is relative to distance. An object with a constant speed appears to be moving faster the closer it is to you regardless of the angle of motion. Telephoto lenses make objects appear closer and speeds appear relatively faster regardless of the angle of motion.

Joe

 

[djacobox372]

I believe everyone agrees that something approaching or receding will appear slower due to telephoto compression.

No. The perception of motion is relative to distance. An object with a constant speed appears to be moving faster the closer it is to you regardless of the angle of motion. Telephoto lenses make objects appear closer and speeds appear relatively faster regardless of the angle of motion.Joe

Like I said before "given the same framing" the object in the telephoto shot will appear slower due to perspective compression. With a wide angle lens you have to be a lot closer to the subject to achieve the same photo, so they appear to move faster.

 

[imagemaker46]

All I know is that it's more of a challenge to shoot sports tight than it is loose.