Best Distance for Sigma 50mm 1.4 and Canon 550D


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dannytux

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Aug 17, 2010
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#1
Hi All,

I'm newbie in photography, hopefully the "master" here can share some of the technique of using above combo. It seems i can only get a tack sharp copy at 1metre distance. Above that, it's soft focus. Used in 5dmk2 and all distance is sharp.

Anyone can share the technique or maybe some example too of portrait photo?

Thanks
Danny
 

Rashkae

Senior Member
Nov 28, 2005
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#2
What apertures are you shooting at? Lighting conditions? Are you moving after locking focus?

Too many variables. Post a sample pic and maybe we can help more.
 

dannytux

New Member
Aug 17, 2010
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#3
natural lighting, aperture tried from 1.4 to 5.6, with distance more than 1 m it's soft. If within 1 - 1.25 m if sharp. well, i never recompose the focus.. should i try shot on tripod instead?
 

Octarine

Moderator
Staff member
Jan 3, 2008
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Pasir Ris
#4
Is the lens focusing? Manual focus mode accidentally? Do a structured test with different distances, leave aperture and all the rest constant. Do a focus test using test charts (read the instructions).
 

Shizuma

Senior Member
Mar 19, 2012
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#6
try focusing manually. any AF beep ?
if photos are soft and AF is working try stopping down to between F4 to F8?

wise man tell me lens very sharp between F4 to F8
 

dannytux

New Member
Aug 17, 2010
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#8
thanks all, i think its just at 1.4 and maybe my hand is shaking all the time :) - using tripod is ok
 

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