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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 29 Jul 2010 (Thursday) 08:24
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We all know the Sigma 10-20 won't work on a 5D2 right? ... Wrong!

 
rkkwan
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Aug 03, 2010 20:21 as a reply to  @ post 10656857 |  #46

5D Classic, Sigma 8-16, Kenko 1.4x. Besides the obvious vignetting and barrel distortion, there's also a general lack of sharpness throughout the zoom range, even in the middle of the image. Will do some more experiments tomorrow with better light and fewer mosquitoes:

8mm

IMAGE: http://rkkwan.zenfolio.com/img/s5/v4/p579615991-4.jpg

~10mm
IMAGE: http://rkkwan.zenfolio.com/img/s10/v17/p820247686-4.jpg

~12mm
IMAGE: http://rkkwan.zenfolio.com/img/s10/v16/p787589991-4.jpg

~14mm
IMAGE: http://rkkwan.zenfolio.com/img/s10/v17/p824467098-4.jpg

16mm
IMAGE: http://rkkwan.zenfolio.com/img/s8/v9/p767784564-4.jpg

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Dan ­ C
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Aug 03, 2010 20:24 |  #47

Have you tried lightroom's lens corrections?


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Dan ­ C
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Aug 19, 2010 14:44 |  #48

I now have the 1.4x, 5D, and 11-16. Took some quick shots last night and the results were pretty good. I will post more later when there's more light.


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DreDaze
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Aug 19, 2010 15:03 |  #49

not sure how i missed this the first time around...but this shows the benefits of subscribing to the archive threads sometimes...tupper had been doing this for over a year...i thought most knew about this little trick...

https://photography-on-the.net …?p=8375769&post​count=2078

Dan C wrote in post #10751707 (external link)
I now have the 1.4x, 5D, and 11-16. Took some quick shots last night and the results were pretty good. I will post more later when there's more light.

i don't see the point of this...adding the 1.4X puts you at 15.6mm...i always thought i heard the 11-16mm stops vignetting on FF at ~15-16mm...so you're adding the 1.4X for no reason it seems


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ilumo
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Aug 19, 2010 21:54 as a reply to  @ post 10625839 |  #50

Are you sure? The 40d at 10mm is really 16mm, and it looks the same as the 5d2 at 10mm with a 1.4, which is supposed to be "14" no? It doesn't look 14mm wide. Maybe it's my eyes?


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ilumo
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Aug 19, 2010 21:55 |  #51

DreDaze wrote in post #10751814 (external link)
not sure how i missed this the first time around...but this shows the benefits of subscribing to the archive threads sometimes...tupper had been doing this for over a year...i thought most knew about this little trick...

https://photography-on-the.net …?p=8375769&post​count=2078

i don't see the point of this...adding the 1.4X puts you at 15.6mm...i always thought i heard the 11-16mm stops vignetting on FF at ~15-16mm...so you're adding the 1.4X for no reason it seems

Not true. My 11-16 still vignettes a good amount at 16mm wide open.


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dmo580
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Aug 19, 2010 23:11 |  #52

ilumo wrote in post #10754072 (external link)
Are you sure? The 40d at 10mm is really 16mm, and it looks the same as the 5d2 at 10mm with a 1.4, which is supposed to be "14" no? It doesn't look 14mm wide. Maybe it's my eyes?

The 5D shot is slightly wider... I don't see it being 2mm wider though.... THat's more than 10% difference 14 vs 16.... Not sure I can see it though


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ilumo
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Aug 20, 2010 12:27 |  #53

dmo580 wrote in post #10754513 (external link)
The 5D shot is slightly wider... I don't see it being 2mm wider though.... THat's more than 10% difference 14 vs 16.... Not sure I can see it though

me neither. If it really works that way though, and a 10mm is 14mm, i would get a sigma 8-16 + 1.4 tele in a heartbeat and use it on FF.


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jacobsen1
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Aug 20, 2010 13:40 as a reply to  @ ilumo's post |  #54

CyberDyneSystems wrote in post #10624779 (external link)
The results are impressive I must say, I would not have expected the TC to play nice with such a wide lens!

agreed, this has my wheels spinning all over again...

MichaelBernard wrote in post #10654020 (external link)
I'm sorry why would you not just go Sigma 12-24mm and call it a day? You can get them used for about the same price as this combo no?

filter use would be awesome at 14mm on FF... If it's possible.

DreDaze wrote in post #10751814 (external link)
i don't see the point of this...adding the 1.4X puts you at 15.6mm...i always thought i heard the 11-16mm stops vignetting on FF at ~15-16mm...so you're adding the 1.4X for no reason it seems

the 11-16mm is only good at 16mm and only stopped down and even then it's still got soft corners (if you were landscaping they're pretty obvious).

so, from what we've seen:

  • this works very well with the 10-20mm sigma
  • can that combo be used with filters?
  • the 8-16 (11.2-22.4) seems to have enough issues, the 12-24mm is a better option
  • the 11-16mm doesn't make sense on the grounds that it's basically 16mm once converted with 1.4...
  • what about canon's 10-22? It's slightly better than sigma's 10-20 optically, AND it covers the whole FF sensor at about 14mm on it's own, so it could be BETTER? (needs to not have the EF-S baffle at the back).


I really wish I knew about this last week though. I was doing my 7D-vs-5Dii tests with a 10-22 that's already converted to EF. It mounts on FF but it's corners are ALWAYS soft (because you're at the edge of the image circle). But it looks like it'd work on 1.3 no problem, but if I'd had a 1.4TC I could have used the 10-22 on the FF w/o any issues?

Do, do filters work guys?
What TCs work for this? The kenko obviously, but do any of the others?

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Dan ­ C
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Aug 20, 2010 13:49 |  #55

jacobsen1 wrote in post #10757601 (external link)
agreed, this has my wheels spinning all over again...

filter use would be awesome at 14mm on FF... If it's possible.

the 11-16mm is only good at 16mm and only stopped down and even then it's still got soft corners (if you were landscaping they're pretty obvious).

so, from what we've seen:
  • this works very well with the 10-20mm sigma
  • can that combo be used with filters?
  • the 8-16 (11.2-22.4) seems to have enough issues, the 12-24mm is a better option
  • the 11-16mm doesn't make sense on the grounds that it's basically 16mm once converted with 1.4...
  • what about canon's 10-22? It's slightly better than sigma's 10-20 optically, AND it covers the whole FF sensor at about 14mm on it's own, so it could be BETTER? (needs to not have the EF-S baffle at the back).


I really wish I knew about this last week though. I was doing my 7D-vs-5Dii tests with a 10-22 that's already converted to EF. It mounts on FF but it's corners are ALWAYS soft (because you're at the edge of the image circle). But it looks like it'd work on 1.3 no problem, but if I'd had a 1.4TC I could have used the 10-22 on the FF w/o any issues?

Do, do filters work guys?
What TCs work for this? The kenko obviously, but do any of the others?

I thought no EF-S lens will work with a teleconverter. At least that's the case with my Kenko.


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jacobsen1
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Aug 20, 2010 13:57 |  #56

Dan C wrote in post #10757655 (external link)
I thought no EF-S lens will work with a teleconverter. At least that's the case with my Kenko.

that might be true, but my 10-22 is EF. ;)
http://www.youtube.com​/watch?v=IDfyu_fuOf4 (external link)

costs $11 and takes ~1 minute. :lol:


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Dan ­ C
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Aug 20, 2010 14:35 |  #57

jacobsen1 wrote in post #10757687 (external link)
that might be true, but my 10-22 is EF. ;)
http://www.youtube.com​/watch?v=IDfyu_fuOf4 (external link)

casts $11 and takes ~1 minute. :lol:

Nice! Would that trick work on other lenses like the 15-85 or 55-250?


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jacobsen1
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Aug 20, 2010 14:41 |  #58

no, only the 10-22. The images circles never cover the sensor with the rest.... which of course makes me wonder if that trick (EFs->EF) would work with this trick (1.4 TC) for any of them? Of course once you add the TC in the mix it takes a lot away from a lot of these lenses thanks to the light loss (ie you're not getting a 17-55 at 2.8 with IS...). With the wide it's an option because I always stop my wide down anyway...


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MiFa
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Aug 20, 2010 15:39 |  #59

ilumo wrote in post #10754072 (external link)
Are you sure? The 40d at 10mm is really 16mm, and it looks the same as the 5d2 at 10mm with a 1.4, which is supposed to be "14" no? It doesn't look 14mm wide. Maybe it's my eyes?

I heard that 11mm of Tokina 11-16 is wider than 10mm of sigma 10-20 :)




  
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MiFa
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Aug 20, 2010 15:39 |  #60

Dan C wrote in post #10751707 (external link)
I now have the 1.4x, 5D, and 11-16. Took some quick shots last night and the results were pretty good. I will post more later when there's more light.

Please post your Photos :rolleyes:




  
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