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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Sep 2012 (Monday) 13:11
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New Sigma 35mm f/1.4 HSM DG

 
vinmunoz
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Jan 09, 2013 22:51 |  #1801

wow this lens is a hotcake. the thread is updated every time i click user cp.


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basketballfreak6
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Jan 09, 2013 22:56 |  #1802

some quick testing on static subjects without charts or anything it front focuses on stock +8 microadjust seems to be good haven't tested outdoors...but damn the lens is sharp


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AlanU
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Jan 09, 2013 23:04 |  #1803

basketballfreak6 wrote in post #15468965 (external link)
some quick testing on static subjects without charts or anything it front focuses on stock +8 microadjust seems to be good haven't tested outdoors...but damn the lens is sharp

I'd get another copy. +8 is a bit much IMO. Perhaps some may not worry much but for a new lens thats unacceptable for me. Put that same lens on a camera with no MA would be useless.

All of my lenses are extremely sharp on my 5d classic. If I had your copy that would very likely be extremely out of focus.


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sgtbueno
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Jan 09, 2013 23:16 |  #1804

Alan is back lol


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basketballfreak6
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Jan 09, 2013 23:17 |  #1805

AlanU wrote in post #15468990 (external link)
I'd get another copy. +8 is a bit much IMO. Perhaps some may not worry much but for a new lens thats unacceptable for me. Put that same lens on a camera with no MA would be useless.

All of my lenses are extremely sharp on my 5d classic. If I had your copy that would very likely be extremely out of focus.

i got a party i'd be shooting in a couple weeks and would like to use this lens...i may drop it off to get it calibrated by sigma after that tho...since i ordered lens online don't want to have to pay to send it back and sigma in australia turnaround time can take up to a month but so far i am liking the lens quite a lot


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Invertalon
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Jan 09, 2013 23:20 |  #1806

Alan,

I don't really see +8 a problem if you use bodies with MA... Many wont use bodies without MA.

I would find 15 or more in any direction too much. But less than 10? Not a problem.

Also note on your 5Dc that it is only 12 megapixel and not that demanding on lenses with critical focus. I had lenses that required MA on my 5D2 yet perfect with the 5Dc.


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LV ­ Moose
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Jan 09, 2013 23:28 |  #1807

Invertalon wrote in post #15468935 (external link)
Does it focus fine in normal light? Or front focus all the time?

I'll test it tomorrow outside.


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Sirrith
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Jan 10, 2013 00:06 |  #1808

AlanU wrote in post #15468990 (external link)
I'd get another copy. +8 is a bit much IMO. Perhaps some may not worry much but for a new lens thats unacceptable for me. Put that same lens on a camera with no MA would be useless.

All of my lenses are extremely sharp on my 5d classic. If I had your copy that would very likely be extremely out of focus.

So don't buy it. :rolleyes:

With all due respect, virtually every single person who has one or has tried one seems to be happy with it, you don't have one and you aren't happy with it. Seems a bit odd, no?


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vinmunoz
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Jan 10, 2013 00:20 |  #1809

bw!


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Invertalon
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Jan 10, 2013 00:45 |  #1810

Ok so I just did more testing with my issue...

Outside on high contrast targets, 0 MA is razor sharp wide open no question. Switch to any positive MA value and progressively gets softer. I took 3-4 shots at each target between both settings each time. I also have tested prior confirming outside, no MA is the best.

Indoors it is a mixed bag. I think it really depends on light level and type of light. Sometimes 0 is best, other times it wont nail a sharp shot at all until I switch it to +9 MA. Note, FoCal also states +9 was best when tested prior to my trip when I ran it multiple times are various distances. Using 1000W halogen lights at my light source. I will be curious if I test using natural light instead.

But it is strange... Sitting in one spot in the rental home we are at, shooting two different high contrast targets at different parts of the room ... One is clearly sharpest at 0, the other +9... The other day at Knotts Berry Farm at a theater show, I could not get a sharp image of the curtain stage from about 50+ feet away at 0... Switched to 9 and perfect right away.

It appears that in low light and *some* artificial light, not all.... That it will cause front focusing. I can confidently confirm this at least with my lens, without question. But most of the time it does not do this behavior in normal conditions.

Wonder why it performs the way it does... It is an interesting issue. Wonder if others experience the same or it is just mine.


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RafaPolit
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Jan 10, 2013 00:48 |  #1811

Could it be changes in the weather, specifically the heat? Could there be some 'expanding' going on that affects this?

Rafa.


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Nightdiver13
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Jan 10, 2013 00:51 |  #1812

Invertalon wrote in post #15469232 (external link)
Wonder why it performs the way it does... It is an interesting issue. Wonder if others experience the same or it is just mine.

Yes, very strange indeed. Are you thinking of trying another copy to see if it's an isolated incident? Mine has been consistent across all types of light and light levels so far.


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Sirrith
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Jan 10, 2013 00:53 |  #1813

That is indeed quite strange. It cannot be reproduced with another lens?


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Invertalon
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Jan 10, 2013 01:13 |  #1814

Does not happen with my 24-70, 70-200 or any other lens ive used in the past. Only this one!


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Earwax69
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Jan 10, 2013 01:20 |  #1815

I got the same thing with my 135L. Different MA indoor than outdoor. Also different MA depending on distance. I have packed the lens and returned it this afternoon via amazon automatic returns. I just hope they will indeed replace it by a new one.

I would return the sigma before your 30 days are over.


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