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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 14 Mar 2013 (Thursday) 05:09
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Sigma 50mm f1.4 - SOFT?

 
sgtbueno
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Mar 21, 2013 23:58 |  #46

I just picked this up for 300 used and wow, I am so happy, this is my first image with this lens.

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snake0ape
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Mar 22, 2013 00:13 |  #47

francis_a wrote in post #15741697 (external link)
I guess the trick is to use LV-AF as the baseline and adjust VF-AF to match that of LV.

I would suggest using LV manual focus as the baseline. That is as tack sharp your lens will get. LV-AF at best will match a correctly LV-MF. I find AF in live view as well as through the VF in larger incremental steps so in most cases it is blurrier than MF.


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Mar 22, 2013 01:54 |  #48

gjl711 wrote in post #15741685 (external link)
MFA does not work with LV. MFA is for VF-AF only. LV autofocus uses a different system.

So why does Reikan Focal suggest using Live View to calibrate ?


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Mar 22, 2013 06:37 |  #49

Reikan Focal suggested MF set to +11

Sample shot using same chart as before :


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Tomorrow it's time for some real use of the lens on real things

Canon 5D Mk lll & 50D : Canon 70-200mm f/2.8 L, Canon 70-300mm f/4-5.6 IS , Canon EF-S 17-55mm f/2.8 IS, Canon EF-S 10-22mm, Canon 100mm f/2.8 Macro, Canon 50mm f/1.8, Sigma 17-70mm, Sigma 50mm f/1.4

  
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gjl711
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Mar 22, 2013 07:57 |  #50

I Like to Watch wrote in post #15742151 (external link)
So why does Reikan Focal suggest using Live View to calibrate ?

I would need to see the context but as already mentioned it's probably to establish a baseline or the use of phase detection AF and then checked in LV.


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05Xrunner
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Mar 22, 2013 08:06 |  #51

how is the lens at distance. I have had 3 copies of this lens 2 went for calibration and it always was pretty good in about 7feet and closer. its when you went to the 10feet and beyond the focus got all whacky. it would be hit or miss for no reason to completely miss focus at further distances. so check that as well


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stang67
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Mar 24, 2013 01:53 |  #52

sgtbueno wrote in post #15741944 (external link)
I just picked this up for 300 used and wow, I am so happy, this is my first image with this lens.

*cut*

Looking good :) Very sharp.

I Like to Watch wrote in post #15742438 (external link)
Reikan Focal suggested MF set to +11

Sample shot using same chart as before :

*cut*

Tomorrow it's time for some real use of the lens on real things

Looks good. Looking forward to seeing some real world examples.

05Xrunner wrote in post #15742664 (external link)
how is the lens at distance. I have had 3 copies of this lens 2 went for calibration and it always was pretty good in about 7feet and closer. its when you went to the 10feet and beyond the focus got all whacky. it would be hit or miss for no reason to completely miss focus at further distances. so check that as well

Well the closer I go with mine the worse it looks generally. I believe half the problem is the issue of the AF trying to lock on at 1.4 with such small DOF. I shot the same object in the same position etc using burst on my 1d mark ii and some shots definitely looked sharper than others (really need to do some tests outside in the daylight with my tripod).


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stang67
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Mar 25, 2013 01:49 |  #53

Just sold the original for about $300. Hopefully everything goes smooth from here.


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Apr 03, 2013 02:08 |  #54

Real World pics @ f/1.4 after Calibration

No sharpening (image reduced to 1280 x 853)


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No Sharpening (cropped 1280 x 853)

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Canon 5D Mk lll & 50D : Canon 70-200mm f/2.8 L, Canon 70-300mm f/4-5.6 IS , Canon EF-S 17-55mm f/2.8 IS, Canon EF-S 10-22mm, Canon 100mm f/2.8 Macro, Canon 50mm f/1.8, Sigma 17-70mm, Sigma 50mm f/1.4

  
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Apr 03, 2013 02:15 |  #55

...and same crop with a bit of post processing


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Canon 5D Mk lll & 50D : Canon 70-200mm f/2.8 L, Canon 70-300mm f/4-5.6 IS , Canon EF-S 17-55mm f/2.8 IS, Canon EF-S 10-22mm, Canon 100mm f/2.8 Macro, Canon 50mm f/1.8, Sigma 17-70mm, Sigma 50mm f/1.4

  
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Apr 03, 2013 02:43 |  #56

Same lens @ f/1.8 (resized to 1280 x 853 no processing)


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Canon 5D Mk lll & 50D : Canon 70-200mm f/2.8 L, Canon 70-300mm f/4-5.6 IS , Canon EF-S 17-55mm f/2.8 IS, Canon EF-S 10-22mm, Canon 100mm f/2.8 Macro, Canon 50mm f/1.8, Sigma 17-70mm, Sigma 50mm f/1.4

  
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stang67
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Apr 08, 2013 08:11 |  #57

Looks fantastic :) Especially the bokeh :D There is some CA visible, particularly on the thin branches of the tree, but given the conditions it doesn't seem all that bad. I have a 1D Mk III on its way (due to arrive in about 2 days) and just (about 10 minutes ago) bought a 50D which should be here by the end of the week. Slightly more than broke right now, but will be selling my 30D and 1D Mk II. Hopefully soon I will have some spare time to take some pictures (this week I have tests for my university subjects so no time for hobbies).


Canon 6D - Canon 1D Mk III - 70-200mm f/2.8L IS II | Σ 105mm f/2.8 | Canon 400mm f/5.6L | Σ 35mm f/1.4 | 17-40mm f/4L
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Sigma 50mm f1.4 - SOFT?
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