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View Full Version : What we get? using 50mm f1.8 wide-open on closest-distance

Loekito
23rd of March 2005 (Wed), 23:31
Just curious.. what happened if we use 50mm f1.8 wide-open on it's shortest focusing distance? for example taking close-up on a person (really close-up, framed on the person's head).

Do we will get a blurry images? just because it's wide-open and focus very near, that cause the DOF very narrow? or do we will still get decent (even not so sharp) image?

Thanks a lot.

regards,

Loekito
Steve Parr
23rd of March 2005 (Wed), 23:53
I'd say give it a shot and see what happens...

Steve
Loekito
23rd of March 2005 (Wed), 23:58
Yup, I already did, but that was the cause I writing this.. since I get the blurry one. So confuse.. is it normal?.. or something wrong with the lens?

regards,

Loekito
glangston
24th of March 2005 (Thu), 00:06
Depth of field is .2 in at 18 inches from subject with your lens wide open. That's 1/2 the width of a CD jewel case.
JusSmith
24th of March 2005 (Thu), 01:35
The 50mm isn't too sharp at 1.8, so I wouldn't bother using it below 2.8 anyway!
Loekito
24th of March 2005 (Thu), 03:45
Yep.. I think I got it now... :)

Thanks...

regards,

Loekito
mr.photoguy
24th of March 2005 (Thu), 04:49
http://www.pbase.com/brucescott/image/40660486/original.jpg

I took this image last week. I was at the closest focusing distance for the lens.

f1.8
t 1/50th
iso 800
MF