Originally posted by icypepsi Wrong at the basics.
1. different Lens FL = different perspective.
Not quite correct.
FL of the lens has indirect effect on perspective.
What actually does matter is distance between sensor/film plane and subject.
Easy exercise to is, slap zoom on your camera and take a series of shots of the same subject from the same spot. Then take the widest shot and crop it to match the framing on the longest shot and then compare. The perspective will be the same.
What does change perspective is when you change the distance between camera and object. With the same zoom, take a picture on long(ish) end and then zoom out and recompose to match framing. Then compare your shots.....
Quote: 2. Different sensor size = different FoV.
If you keep the same lens, this is correct but if you change lens with the same ratio as sensor size then it's incorrect.
Quote: In Pentaxor's pics, did you not find any difference between those taken at different FLs?
as I wrote above, the perspective didn't change because of different focal length but because the photog was moving from close to farther with each longer lens.
Shooting the same model from the same spot with different lenses wouldn't change the perspective.
Quote: If you didn't, then u either don't understand FoV or perspective. I'd suggest you google and do some readup.
I'm not quite sure you are the one to give this advice based on your previous posts, unless I misread something
Quote: Sorry Pentaxians, I'm going way off topic here. I was just pissed that someone called people names mindlessly and said the 85mm was not required at all. I'm going to stop
No need to apologize, the forum is here to discuss stuff....
is 85mm required on APSC? for the same purposes as 135 on film, definitely so, but but 85mm on APSC and 85mm on FF system are two very different things IMO.
If someone likes shooting that long on APSC then by all means the Sigma seems to be one helluva lens....