Sigma 10-20mm F4-5.6


gh0s7

New Member
Mar 31, 2011
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#1
Hi!

Anyone knows which shop still have this lens in stock?

I called quite a few but they'll have to order it thus I have no fixed date as to when it'll arrive.

Thanks! :)
 

wrx_sti_22b

Senior Member
Apr 14, 2005
4,968
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#2
This lens the sharpness & resolution not very good one... colours also not nice... do reconsider. I had one before, though not Pentax mount.
 

gh0s7

New Member
Mar 31, 2011
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#3
So is there any alternative to this lens? similar price range too.
 

Supersimon27

Senior Member
Jan 20, 2010
2,946
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#4
This lens the sharpness & resolution not very good one... colours also not nice... do reconsider. I had one before, though not Pentax mount.
Ermmm ... Don't think so wor . As what I know wk(nightmare86) is using this lens wor . Review for this lens was also quite good . I had try brian copy b4. To me the sharpness is decent and colour is good also . Perhaps u got a bad copy ?
 

May 7, 2010
1,028
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#6
This lens is nothing short of stunning.
the only thing is that u'll need is to have it calibrated as most of the copies out there are out of focus...
 

gh0s7

New Member
Mar 31, 2011
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#7
Well, after reading much reviews and lookin thru the forums I can see that the sigma 10-20 is still recommended.
However, since it's so hard to acquire one now, i might just settle for a Tamron 10-24 ..
 

May 7, 2010
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#8
and from a lot of reviews, the tamron seems to be the worst UWA choice among all
 

GSiGuy

New Member
Sep 14, 2010
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#12
How do you know if the sigma 10-20 is OOF? is there a way to test? my copy feels like it isn't as sharp but maybe i'm expecting too much.. i am looking at my tripod mounted shots though...
 

edutilos-

Senior Member
Dec 28, 2010
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#15
GSiGuy said:
How do you know if the sigma 10-20 is OOF? is there a way to test? my copy feels like it isn't as sharp but maybe i'm expecting too much.. i am looking at my tripod mounted shots though...
This lens is sharper from f/8-f/16.
 

GSiGuy

New Member
Sep 14, 2010
1,143
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#16
This lens is sharper from f/8-f/16.
most of my landscape shots were taken at that range. and mostly f16. it's hard to tell if the long exposures had been affected as i noticed that most of them were taken when the tripod was positioned on wooden walkways. those tend to attract some vibration even in the best of circumstances, i.e. when no one walking nearby... so there could be other factors. i therefore conclude that the best way might be the test suggested by bro dnaxe... need to find time to do the test though.

but not one of my shots can come close to razor tack poke-your-eye-out sharp as supersimon's on his 8-16... its most likely down to his skill... envy...
 

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pinholecam

Moderator
Staff member
Jul 23, 2007
10,933
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#18
Just shoot a simple text print like a newspaper and check. If its not sharp, its not sharp , that is what I do to check (don't know how to give an empherical value via text). Try live view as well. If live view is sharp, then its a focus issue between camera and lens. Send down to Sigma (lens) /Emjay (camera) for calibration.
 

edutilos-

Senior Member
Dec 28, 2010
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#19
most of my landscape shots were taken at that range. and mostly f16. it's hard to tell if the long exposures had been affected as i noticed that most of them were taken when the tripod was positioned on wooden walkways. those tend to attract some vibration even in the best of circumstances, i.e. when no one walking nearby... so there could be other factors. i therefore conclude that the best way might be the test suggested by bro dnaxe... need to find time to do the test though.

but not one of my shots can come close to razor tack poke-your-eye-out sharp as supersimon's on his 8-16... its most likely down to his skill... envy...
Proper sharpening also contributes to this, I suspect, though the 8-16 probably does outperform the 10-20 f/4-5.6, being a newer lens.

Please do not forget that the 8-16 cannot use filters as well, I would deem filter usage as being an advantage instead of marginal sharpness.

Are you using a timer + Mirror Lock Up technique?
 

detritus

Senior Member
Sep 12, 2009
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#20
most of my landscape shots were taken at that range. and mostly f16. it's hard to tell if the long exposures had been affected as i noticed that most of them were taken when the tripod was positioned on wooden walkways. those tend to attract some vibration even in the best of circumstances, i.e. when no one walking nearby... so there could be other factors. i therefore conclude that the best way might be the test suggested by bro dnaxe... need to find time to do the test though.

but not one of my shots can come close to razor tack poke-your-eye-out sharp as supersimon's on his 8-16... its most likely down to his skill... envy...
not just equipment and skill. have to ask Simon what's his PP workflow as well - RAW files needs to be processed properly to bring out the true character of the pic.

direct JPEG output or RAW that had not been processed will definitely not look as good.
 

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