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Thread started 20 Nov 2012 (Tuesday) 23:10
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Sigma 35mm f/1.4 DG HSM

 
turbo_911
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Location: State College, PA
     
Feb 20, 2014 09:20 |  #5926

Does anyone have problems with focusing in low light or when it gets darker?
This is my 2nd copy, better than the first one, and I've spent around 1 hour adjusting it with dock, and it still front or back focuses when EV is less than 6.5.
When EV is between 6.5-8.5 it focuses fine.


Canon 6D | Rokinon 14mm f/2.8 | Canon 100mm f/2.8L IS |

  
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geek2
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Location: Honolulu, HI
     
Feb 20, 2014 12:03 |  #5927

^ I have the low-light focusing problem on my 70D. My problem is that the MA requirements change from day to day. Sometimes I need the adjustment and sometimes I don't at all (0). Since I have multiple events in the coming weeks, I can't send my cam/lens out to Sigma for their free adjustments just yet.


Gear
5D3, 70-200 f/2.8L IS II, Cheetah Light CL-360
Past Bodies
450D. 7D. 5D2. 60D. G15. RX100ii. 70D. RX100iii

  
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JakAHearts
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Feb 20, 2014 12:19 |  #5928

How low are we talking? Im not sure how to measure EV or even what it means.


Shane
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turbo_911
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Feb 20, 2014 15:05 |  #5929

Well, normal sunny day is like EV 9, cloudy ranges from Ev 6-8.

I set-up FoCal chart on my wall, and camera was on tripod and ran the program 4 times, same distance, same everything except different time of the day. When it was sunny I needed MA of +3, cloudy MA of +9 and florescent light MA of +15.

I did calibrate my lens on cloudy day, with EV 7.5-8, and on sunny day you can't really tell if it miss focuses, maybe slightly if you pixel peep. However when I took pictures during tungsten/fluorescent light (basically indoors, and it had plenty of light), it back focused heavily, like every single picture was out of focus. Next day I go outside and take a bunch of pictures, and they are all spot on.

So I re-calibrated my lens in fluorescent light, and now indoors it focuses spot on, and outside it front focuses. This is very annoying as I love the lens and but it constantly misses focus.

My 30mm f/1.4 wasn't as bad on my 40D, but 35mm on 6D is like unusable.


Canon 6D | Rokinon 14mm f/2.8 | Canon 100mm f/2.8L IS |

  
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JakAHearts
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Feb 20, 2014 15:08 |  #5930

turbo_911 wrote in post #16704654 (external link)
Well, normal sunny day is like EV 9, cloudy ranges from Ev 6-8.

I set-up FoCal chart on my wall, and camera was on tripod and ran the program 4 times, same distance, same everything except different time of the day. When it was sunny I needed MA of +3, cloudy MA of +9 and florescent light MA of +15.

I did calibrate my lens on cloudy day, with EV 7.5-8, and on sunny day you can't really tell if it miss focuses, maybe slightly if you pixel peep. However when I took pictures during tungsten/fluorescent light (basically indoors, and it had plenty of light), it back focused heavily, like every single picture was out of focus. Next day I go outside and take a bunch of pictures, and they are all spot on.

So I re-calibrated my lens in fluorescent light, and now indoors it focuses spot on, and outside it front focuses. This is very annoying as I love the lens and but it constantly misses focus.

My 30mm f/1.4 wasn't as bad on my 40D, but 35mm on 6D is like unusable.

Ah, sadly, I dont think the different focus settings for lighting condistions is Sigma specific. My old 85 1.8 required different settings from tungsten to daylight.


Shane
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adamg5
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Feb 20, 2014 17:05 |  #5931

I planted this magnolia tree for our daughter Olivia, the week she was born February 2012.

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Consider me a satellite forever orbiting, I knew all the rules but the rules did not know me...GUARANTEED

  
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Mowglee
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Feb 20, 2014 18:16 |  #5932

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B&W (external link) by n.wetterberg (external link), on Flickr


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JohnPh
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Feb 21, 2014 12:48 as a reply to  @ Mowglee's post |  #5933

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NateRQ
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Feb 21, 2014 14:38 |  #5934

IMAGE: http://www.nathanronquillo.com/Wedding-reception-2-15-14/i-8FvrqrD/0/XL/W1-271-XL.jpg

IMAGE: http://www.nathanronquillo.com/Wedding-reception-2-15-14/i-vrTW8nj/0/XL/W1-231-XL.jpg

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5DMIII Sigma 35mm 1.4 Canon 85mm 1.8 Canon 24-105mm f/4 Canon 135mm f 2

  
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rdp330ci
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Feb 21, 2014 17:17 as a reply to  @ NateRQ's post |  #5935

Canon 5D Mk3 and Sigma 35

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728C5029 web res (external link) by rdp3photography (external link), on Flickr

Canon 5D Mk3, Sigma Art 35mm 1.4, Canon 85mm 1.8, Canon 70-200 F4 L IS, Super Takumar 300 F4, Canon 100mm macro
rdp3photography
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photosample
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Feb 21, 2014 19:09 |  #5936

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

Battersea Power Station by night (external link) by Kalpachev (external link), on Flickr



  
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rdp330ci
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Feb 21, 2014 21:42 as a reply to  @ photosample's post |  #5937

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728C4985 web res (external link) by rdp3photography (external link), on Flickr

Canon 5D Mk3, Sigma Art 35mm 1.4, Canon 85mm 1.8, Canon 70-200 F4 L IS, Super Takumar 300 F4, Canon 100mm macro
rdp3photography
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Dankata
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Feb 21, 2014 22:40 as a reply to  @ rdp330ci's post |  #5938

JakAHearts wrote in post #16701317 (external link)
Killer man! One of my favorite images from you.

vinmunoz wrote in post #16701371 (external link)
agree... thumbs up...

Maizzi wrote in post #16701443 (external link)
Very nice shot, Daniel.

InCip wrote in post #16701763 (external link)
Dantaka, no need to say about your elite photos, but whatever you smoke i wanted it, cuz it kept cranking out awesome ideas. thanks for the inspirations.

majix wrote in post #16702543 (external link)
very nice shot Daniel

Thanks a bunch guys!!

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iKiss (external link) by Daniel Stoychev Photography (external link), on Flickr

-Daniel-
1DXII | 5DIII | 135L | Sigma 35 | 24-70L |17-40L | Sigma 150-600C | 600EX-RT
T1i |85 1.8 | 18-55 | Sigma 10mm f/2.8 Fish Eye | Yongnuo YN-622C| Raynox DCR-250
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Bonbridge
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Feb 22, 2014 06:51 |  #5939

My 35A is making a queeking noise with the autofocus :(
It started yesterday. Someone else got this problem?


5DII + 6D | 16-35/4.0L IS | Σ35/1.4A | 40/2.8 | Σ85/1.4A | 70-200/2.8L IS II
iMac Retina 5k | i7 | 24Gb RAM | 512GB Flash | 4GB M295X

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Twitch03
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Feb 22, 2014 07:28 |  #5940

Just got this lens and a 6D yesterday, came in the mail just in time to snap a few pics in the back yard. Amazing combo, straight out of camera.

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Canon 6D | Sigma 35 1.4
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Sigma 35mm f/1.4 DG HSM
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