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Thread started 21 Sep 2010 (Tuesday) 04:37

# Sigma 120-300 f/2.8 EX OS

Jun 29, 2012 16:14 |  #2341

Jay T wrote in post #14649903
I googled it and its a magnetic sensor that detects where the focus is at. The sigma 85mm f/1.4 is also known to have the same problem.

I see. Thanks Jay.

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Jul 02, 2012 12:55 |  #2342

Here goes with my first photos posted to POTN of a red kite on the Black Isle in Scotland. I am still getting used to using this lens and getting to grips with PP, so I don't think these will match what others have got. Sky was just grey cloud - typical weather in Scotland when it's not raining or snowing. Both are at 600mm with Canon 2xTC III, ISO 800, 1/1000 f5.6.

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Jul 02, 2012 12:58 |  #2343

I'm on a roll now. 2 pics from last week of a male yellowhammer in my garden. Both ISO 1250, 1/1250, f6.3, Canon 2x TC

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Jul 02, 2012 13:17 |  #2344

Honey Monster, they look good to me, I'm still saving.
By the way. any TC on the yellowhammer ?

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Jul 02, 2012 14:07 |  #2345

Canon 2x TC on the yellowhammer as well

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Jul 02, 2012 16:10 |  #2346

Honey Monster wrote in post #14661247
Canon 2x TC on the yellowhammer as well

oh err - 600mm and crap light . Looks good to me

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Jul 02, 2012 16:26 |  #2347

they look good, what camera was used

1DX\ 5diii gripped \ tokina 12-24 f/4 /sigma 24-60 f2.8 \ \ sigma 120-300 OS \ sigma 50 f1.4 \ canon 500 f4 IS \ canon1.4 III tc \ canon 2xii tc \sigma 2x dg tc \ 580ex \ 2x 430ex flickr

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Jul 02, 2012 16:28 |  #2348

Jay T wrote in post #14661817
they look good, what camera was used

It was a 7D

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Jul 02, 2012 16:29 |  #2349

^- thats what im questioning, what camera is this? im thinking a slightly older model... Or the exposure was pushed a hair

-edit- Or they're cropped heavily...

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Jul 02, 2012 16:36 as a reply to  @ woollyback's post |  #2350

here's two from this weekend. My first time out since I got it back from sigma. Both at 600mm, F/6.3 and ss 1/200 and 1/160 with 7d iso 1000

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1DX\ 5diii gripped \ tokina 12-24 f/4 /sigma 24-60 f2.8 \ \ sigma 120-300 OS \ sigma 50 f1.4 \ canon 500 f4 IS \ canon1.4 III tc \ canon 2xii tc \sigma 2x dg tc \ 580ex \ 2x 430ex flickr

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Jul 02, 2012 16:40 |  #2351

the 7d can be a pain in the a$$in hitty light when being use to a 5dii 1DX\ 5diii gripped \ tokina 12-24 f/4 /sigma 24-60 f2.8 \ \ sigma 120-300 OS \ sigma 50 f1.4 \ canon 500 f4 IS \ canon1.4 III tc \ canon 2xii tc \sigma 2x dg tc \ 580ex \ 2x 430ex flickr  LIKES 0 LOG IN TO REPLY Jul 02, 2012 16:54 | #2352 KenjiS wrote in post #14661828 ^- thats what im questioning, what camera is this? im thinking a slightly older model... Or the exposure was pushed a hair -edit- Or they're cropped heavily... Camera was a 7D 1st red kite is about 30% of original frame, 2nd about 60%. Both yellowhammers are only about 20% of original frame. The yellowhammers were about 25 feet away. I'm not really sure how much a picture can be cropped and still be OK. My PP (in LR3) is still a bit trial and error, so maybe could be improved. I did increase exposure on the 1st yellowhammer by 2/3 stop in PP.  LIKES 0 LOG IN TO REPLY Jul 02, 2012 17:00 | #2353 I find the 7d has problems with yellow feathers on birds.It blows the yellows and if you lower it in post they don,t come back to good . Anybody else agree or is it me alone ? 1DX\ 5diii gripped \ tokina 12-24 f/4 /sigma 24-60 f2.8 \ \ sigma 120-300 OS \ sigma 50 f1.4 \ canon 500 f4 IS \ canon1.4 III tc \ canon 2xii tc \sigma 2x dg tc \ 580ex \ 2x 430ex flickr  LIKES 0 LOG IN TO REPLY Jul 02, 2012 17:03 | #2354 2 different examples from a couple of weeks back. The deer is cropped to about 60% of the original frame. 7D + 2xTC ISO 800 1/640 f6.3 Handheld - can't rmember is IS on or off The flower is uncropped 7D+2xTC ISO 800 1/1250 @ f6.3 handheld, IS Off. I should probably have dropped the ISO and turned on IS HOSTED PHOTO please log in to view hosted photos in full size. HOSTED PHOTO please log in to view hosted photos in full size.  LIKES 0 LOG IN TO REPLY Jul 02, 2012 17:11 | #2355 the 7d can be a pain in the a$$ in \$hitty light when being use to a 5dii

Unfortunately in northern Scotland that is the light we often get even in late June in the afternoon, although sunset is after 10:30pm if you can see it through the clouds / rain! I haven't used a full frmae like the 5Dii/iii, although I would like one.

I find the 7d has problems with yellow feathers on birds.It blows the yellows and if you lower it in post they don,t come back to good . Anybody else agree or is it me alone ?

I don't know whether this is true or not. From the histograms it doesn't look to me that the yellows have blown. It may be my PP.

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Sigma 120-300 f/2.8 EX OS
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