Klein experimented with lots of different focal lengths during his career– but he is most well-known for his up-and-close and personal work with a wide-angle lens.
"I photograph what i see in front of me, I move in close to see better and use a wide-angle lens to get as much as possible in the frame."
When Klein would photograph with a wide-angle lens, there would be considerable distortion in his images (which a lot of photographers don’t like). In an interview Klein shared why he preferred using a wide-angle lens (21mm-28mm) compared to something more standard like Henri Cartier-Bresson’s 50mm:
"Does it really bother you? In any case, I’m not deliberately distorting. I need the wide-angle to get a lot of things into the frame. Take the picture of may day in Moscow. With a 50mm jammed between the parade and the side-walk, I would have been able to frame only the old lady in the middle. But what I wanted was the whole group – the tartars, the Armenians, Ukranians, Russians, an image of empire surrounding one old lady on a sidewalk as a parade goes by."

"I photograph what i see in front of me, I move in close to see better and use a wide-angle lens to get as much as possible in the frame."
When Klein would photograph with a wide-angle lens, there would be considerable distortion in his images (which a lot of photographers don’t like). In an interview Klein shared why he preferred using a wide-angle lens (21mm-28mm) compared to something more standard like Henri Cartier-Bresson’s 50mm:
"Does it really bother you? In any case, I’m not deliberately distorting. I need the wide-angle to get a lot of things into the frame. Take the picture of may day in Moscow. With a 50mm jammed between the parade and the side-walk, I would have been able to frame only the old lady in the middle. But what I wanted was the whole group – the tartars, the Armenians, Ukranians, Russians, an image of empire surrounding one old lady on a sidewalk as a parade goes by."



