Sigma 30mm f/1.4 User Group
- Thread starter baileys
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Snapperholic
New Member
Bought this lens over the weekend. Love the bokeh, but somehow i don't quite find the lens sharp. hmm not too sure if its just me. Attached picture without PP, just slight cropping and resizing.
Aperture: 2.8
Shutter: 1/30
ISO: 800
Flash off and handheld.
Hi there,
Perhaps you can try shooting at a higher shutter speed? The above image does seem "unsharp" but the effect can be that drastic especially i the image has not even been blown up yet.
Perhap above 1/30?
Cheers~
Hi Snapper,
Ok i have just took another picture. This time round its a Canon magazine and I focus it on Extender EF 2X II. Do take alook at the pic below. It looks like the auto focus is pretty much there, doesn't have any obvious front/back focussing problem. I never do any PP or cropping, just resizing it. Is this sharp or not so sharp huh? Your advise is kindly appreciated. I hope its just my eye, but so far whatever i took with this lens seems soft and "unsharp".
Aperture: 2.5
Shutter: 1/50
ISO: 400
Flash off and handheld.
Ok i have just took another picture. This time round its a Canon magazine and I focus it on Extender EF 2X II. Do take alook at the pic below. It looks like the auto focus is pretty much there, doesn't have any obvious front/back focussing problem. I never do any PP or cropping, just resizing it. Is this sharp or not so sharp huh? Your advise is kindly appreciated. I hope its just my eye, but so far whatever i took with this lens seems soft and "unsharp".
Aperture: 2.5
Shutter: 1/50
ISO: 400
Flash off and handheld.
I got my sigma 30mm calibrated for the second time as i wasnt satisfied with the sharpness when wide open, well the technican told me that this time round he set the focus for the lens to infinity.. not quite sure what that meant.. but here is a picture of my grandad shot at f/1.4 ;p
rumpledoodles
New Member
I got my sigma 30mm calibrated for the second time as i wasnt satisfied with the sharpness when wide open, well the technican told me that this time round he set the focus for the lens to infinity.. not quite sure what that meant.. but here is a picture of my grandad shot at f/1.4 ;p
wah.. now i am curious to know what he meant by setting the focus to infinity! haha..
this pic looks pretty sharp to me!
oneofakind
New Member
I got my sigma 30mm calibrated for the second time as i wasnt satisfied with the sharpness when wide open, well the technican told me that this time round he set the focus for the lens to infinity.. not quite sure what that meant.. but here is a picture of my grandad shot at f/1.4 ;p
it looks sharp to me, but maybe it doesn't look that sharp to you cos your focus looks like it was on the upper lip to nose area, and not on the eyes. try focusing on the eyes for portraits instead yup
yup ur right.. actually i was trying to get both eyes in focus so i focused onto the nose bridge instead =/ but it seems that at f/1.4 the DOF is really very shallow so its prob impossible to get both eyes in focus when im shooting so upclose... anyway the sigma is really centre sharp wide open.. definately a keeper... just gotta practise more on the shooting techniques i suppose 
Anyway talking about focusing on one eye.. heres another shot at f/1.4 of my dog... focus right onto her eyeball...
Anyway talking about focusing on one eye.. heres another shot at f/1.4 of my dog... focus right onto her eyeball...
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rumpledoodles
New Member
hello all! just got this lens today after wanting it for ages 
anyone of you using it on a nikon body with no in-body motor? eg, d3000 or d5000? when i tried to use manual focus, it looked sharp in the view finder but when i snap the pic everything is blur, or the focus is off.
when using AF, it seems fine.
is it cos the lens isn't communicating with the cam properly cos it's sigma+nikon, or sth i'm not doing right.. or the lens has some problem? =/
anyone of you using it on a nikon body with no in-body motor? eg, d3000 or d5000? when i tried to use manual focus, it looked sharp in the view finder but when i snap the pic everything is blur, or the focus is off.
when using AF, it seems fine.
is it cos the lens isn't communicating with the cam properly cos it's sigma+nikon, or sth i'm not doing right.. or the lens has some problem? =/
Shen siung
Senior Member
hello all! just got this lens today after wanting it for ages
anyone of you using it on a nikon body with no in-body motor? eg, d3000 or d5000? when i tried to use manual focus, it looked sharp in the view finder but when i snap the pic everything is blur, or the focus is off.
when using AF, it seems fine.
is it cos the lens isn't communicating with the cam properly cos it's sigma+nikon, or sth i'm not doing right.. or the lens has some problem? =/
IMO, when manual focus, best to use live view.Because viewfinder is too small for you to be sure it is really sharply in focus. But d3000 don't have live view right?
rumpledoodles
New Member
i'm on a d5000. haven't tried MF on liveview yet tho. the AF on liveview is so crap, i don't use it at all. shall try it out to see if it works.
for now it's quite a hit and miss thing for me =/ sometimes the focus is totally off even though it looks sharp, but sometimes it's just abit soft. not sure what's happening man..
You can try to use spot focus and choose the focus spot. I used to use the centre focus spot to focus lock then recompose. Found out the depth is so shallow that during the recomposure the focus will be off.
rumpledoodles
New Member
anyone has any idea which shop has stock for this lens?
intend to buy it but CP has no stock at the moment.
thanx in advance
i jus got it about a week ago at SLR revolution. theyre at the 5th floor of funan, opp john3:16. $715 if i am not wrong. i got the nikon mount one
rumpledoodles
New Member
i jus got it about a week ago at SLR revolution. theyre at the 5th floor of funan, opp john3:16. $715 if i am not wrong. i got the nikon mount one
thanx very much for your info
.. i going to get the canon mount one next year january. hopefully there is some for testingShen siung
Senior Member
anyone has any idea which shop has stock for this lens?
intend to buy it but CP has no stock at the moment.
thanx in advance
Might want to try OP?
tested on a tripod f/1.4 @ 1/60 ISO 800. Soft wide open but i guess that's normal. Focus was on the middle panasonic battery.
I feel since you use tripod, why not set ISO at 100 / 200. To me it looks grainy more then soft...
shazie
Member
well... i was doing comparison shots from f1.4 to f5.6... by the time it reached f5.6, shutter speed dropped a lot... moreover i don't have a shutter release cable and i was too lazy to use the timer... so i just pushed up the ISO...
anyway, just tested the lens during the day and i've decided that this lens is tack sharp at f2.8 and super-sharp at f4.0... i'll probably use 1.4 and 2.0 if shutter speed drops below 1/30...
anyway, just tested the lens during the day and i've decided that this lens is tack sharp at f2.8 and super-sharp at f4.0... i'll probably use 1.4 and 2.0 if shutter speed drops below 1/30...
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