Christmas is in the air.... -- Critique Corner in photography-on-the.net forums

AWGD8

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Dec 13, 2009 21:19 | #1

Just a quick test on my new Sigma lens 30mm. (just testing it at wide open f 1.4 )

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Alamy Creative Collection Contributor since 2010
Sony Nex5n w/ 18-55 kit lens/ Canon FDn 50 1.4
Had: 5Dc , XSi , S95, Fuji X10, Sigma 30mm 1.4/ 50 1.4 , 85 1.8, 24-70L , 24 LII 1.4,

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Robert_Lay

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Dec 13, 2009 21:37 | #2

All very nice, indeed. Is there anything in particular that should get our attention - for critique, that is?

Bob
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Canon Rebel XTi; EF-S 10-22mm f/3.5-f/5.6 USM; EF-S 18-55 mm f/3.5-f/5.6; EF 28-135mm f/3.5-5.6 IS USM; EF 50mm f/1.4 USM; Canon Powershot G5; Canon AE1(2); Leica R4s; Battery Grip BG-E3; Pentax Digital Spotmeter with Zone VI Mod & Calibration.

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AWGD8
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Dec 13, 2009 21:43 | #3

Robert_Lay wrote in post #9192053

All very nice, indeed. Is there anything in particular that should get our attention - for critique, that is?

Thanks Sir Robert. Softness at wide open is my concern on this lens.

Alamy Creative Collection Contributor since 2010
Sony Nex5n w/ 18-55 kit lens/ Canon FDn 50 1.4
Had: 5Dc , XSi , S95, Fuji X10, Sigma 30mm 1.4/ 50 1.4 , 85 1.8, 24-70L , 24 LII 1.4,

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Robert_Lay

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Dec 13, 2009 22:09 | #4

Softness at full aperture is typical, and that is why the sweet spot is usually at 2 or more f-stops smaller aperture.

Take a look at the sample of 6 shots taken over a range of several f-stops:
http://www.llvj.com …eries/u-diffraction.shtml

It is easy to confuse softness due to other lens problems and softness due to depth of field. Sp, if you are really interested primarily in softness due to wide open lens, then you should shoot at a scene where everything is at the same distance.

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AWGD8
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Dec 13, 2009 22:25 | #5

I think I`ll try outdoor shot next time. Just can`t stand the temp. outside right now...
Thanks for the link Bob.

Alamy Creative Collection Contributor since 2010
Sony Nex5n w/ 18-55 kit lens/ Canon FDn 50 1.4
Had: 5Dc , XSi , S95, Fuji X10, Sigma 30mm 1.4/ 50 1.4 , 85 1.8, 24-70L , 24 LII 1.4,

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ScottKCooper

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Dec 14, 2009 11:37 | #6

I think the softness really worked for number 2. there is a point of focus, but it is all a little "dreamy" that way.

https://photography-on-the.net …/showthread.php?t=1276863

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