1st June 2005, 09:36 AM
full sized pics taken by sigma 20mm f1.8?
does anyone know of any full sized pics on the web taken by sigma 20mm f1.8?
I just for my new 20mm f1.8 and I find it very soft at f2.
here is a sample pic. It is a hazy day so the edges blur are due to the morning haze.
Taken handheld shutter speed was very fast so should not have shake
Last edited by wind30; 1st June 2005 at 10:01 AM.
1st June 2005, 10:20 AM
1st June 2005, 12:16 PM
ya the 20mm is rather soft at f2.
Do U have any 100% crop or full size pictures taken with your 24mm f1.8?
1st June 2005, 01:15 PM
Originally Posted by wind30
Seem like photobucket resize the file. Will send to your email if u provide.
100% crop here:
Last edited by bigmouse; 1st June 2005 at 01:35 PM.
1st June 2005, 06:18 PM
1st June 2005, 07:01 PM
Look ok to me
Don't expect too much wide open. Even 50mm f1.8 also soft wide open. It helps if you compose subject at centre when wide open. Somemore Sigma QC is quite loose.
Setting above f2.8 improve a lot. Sweet spot is f8-10. If your pics at above f2.8 still soft then maybe its a bad copy.
Most important for a new lens is does it front or back focus on your cam.
Some of my past posts taken with 24mm. (ambient light)
With ext flash at sweet f-spot.
Last edited by bigmouse; 1st June 2005 at 07:16 PM.
2nd June 2005, 08:58 AM
3rd June 2005, 06:04 PM
I had the Sigma 20mmf1.8 and I have done extensive testing on the lens. It is a decently sharp lens stopped down, but no more sharper than a Nikkor 12-24 and marginally sharper than the 18-70 kit lens at its peak.
F1.8 should be avoided, unless camera shake is an issue.
Lens improves alot by f2.8 in the centre, but in the corners its still soft.
Peak performance comes abt around f5.6, but even then, it is only as sharp as a Nikkor 18-70mm and 12-24 mm at f8. Do not use the lens above f16. F22 the softness is similar to f1.8.
This lens is good for indoor and low light photography. If sharpness is your thing, it will satisfy 90% of the people out there... I wouldnt say it is the sharpest 20mm lens around.
7th June 2005, 01:07 AM
Firstly: many lenses are soft wide open.........
Secondly: big openings are more for ease of manual focusing.........
Thirdly: hazy days are no good subject to do testing..........
8th June 2005, 03:38 PM
How much is this lens selling for in Singapore?