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Thread started 18 Jul 2013 (Thursday) 23:39
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6d keeper rate when shooting f2 outer points

 
bobbyz
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Jul 18, 2013 23:39 |  #1

Today took my 6d and 85mm f1.4 to the park. When using outer points and f2, I had pretty bad success rate. Too many OOF shots. I could be that I am rusty as not much shooting for few months.

One thing I noticed is that horizontal vs vertical position made a difference also. Could be as outer points are not cross type. But even lot of misses in landscape mode also. Settings like ISO800/ISO1600, f2, ss at lower settings like 1/200. Could be my lower ss to blame but I wasn't getting blur, more like OOF.

Little bumbed as I didn't have this issue with 5dmk3. I could put camera in AI servo and shoot happily at f2. Here I was using one shot mode.

I also tried center point in AI servo with 2 yr running at me. I would say I got 1 or 2 out of 10. I will try again but this is my only long lens.

What is your experience when shooting kids at f2 and using outer points of 6d?


5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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kin2son
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Jul 18, 2013 23:44 |  #2
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Care to post an example and 100% crop bobbyz?

Again I just want to establish what oof means, as different people has different definition and expectation.


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bobbyz
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Jul 18, 2013 23:49 |  #3

It was bad man, no need to even go to 100%. I am hoping it is me and not the camera or the lens.

My son sitting and I am firing shots. Of course kids are not staying still like a model but not moving just some slight movements. I am shooting one shot mode with upper most point on the eyes. Pretty good light IMHO. OO, OOF, OK, Sharp, OOF, good.


5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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bobbyz
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Jul 18, 2013 23:53 |  #4

Tried 35L also. Better as more DOF even at f2. But not nailing like 5dmk3. That thing was like having 1 series, boom boom almost every shot even at f1.4.

Right now camera in defaults so when I mentioned AI servo test case, I was in between focus and release priority, I will adjust to focus priority (lower fps) and re do the test. I care less about AI servo as this is not action cam but for one shot it should nail easily as light wasn't bad (late evening).

Also need to MA my lenses and then try again at mugh higher ss. Or maybe time to do some model shoots.:)


5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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kin2son
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Jul 18, 2013 23:54 |  #5
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Also I wouldn't be surprised that others will come in (such as TLG) and say it's your lens ;)

As you probably aware I re-purchased the Sigma 85 recently. I've been taking mostly full body shot, tbh when I zoom into 100% and check the eyes they aren't that sharp...:(

I think it's due to the rather longish focal length and camera to subject distance, even with spot focus, the square is easily larger than the eye and thus making it harder to nail critical focus.

I need to try tighter portrait and see how it goes...


5D3 Gripped / 17-40L / Σ35 / 40 Pancake / Zeiss 50 MP / Σ85 / 100L Macro / 70-200 f2.8L II IS / 430 EX II / 580 EX II / Canon 2xIII TC / Kenko Ext. Tubes
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DunnoWhen
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Jul 19, 2013 04:09 as a reply to  @ kin2son's post |  #6

The upper and lower outer focus points are vertical line sensitive at f5.6.

The other points are horizontal line sensitive at f5.6

Depending upon which focus point you want to use, one trick one might try is to rotate the camera through 0 and 90 degree to confirm focus. E.G. if you want to use and upper focus point and focus on a lamppost, first obtain focus in normal/landscape orientation (vertical focus sensitivity against vertical object) the try again in portrait orientation (now effectively horizontal focus sensitivity against a vertical object).


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moltengold
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Jul 19, 2013 04:26 |  #7

im not a pro
a simple user taking photos for fun
even with the 5D3 i got so many photos out of focus when im shooting kids indoors with a fast lens like the 135L
i never had this problem with my 7D which i sold :(


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mike_311
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Jul 19, 2013 06:54 |  #8

moltengold wrote in post #16133912 (external link)
im not a pro
a simple user taking photos for fun
even with the 5D3 i got so many photos out of focus when im shooting kids indoors with a fast lens like the 135L
i never had this problem with my 7D which i sold :(

how close are you focusing?

you do realize how shallow your DOF is with that lens right? especially on a FF where its even shallower.

you may want to try a wider lens and crop.


Canon 5d mkii | Canon 17-40/4L | Tamron 24-70/2.8 | Canon 85/1.8 | Canon 135/2L
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gfspencer
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Jul 19, 2013 07:26 |  #9

bobbyz wrote in post #16133551 (external link)
I am hoping it is me and not the camera or the lens.

It was you . . . or the lens. Most likely you. ;)


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moltengold
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Jul 19, 2013 07:31 |  #10

thanks mike
more than three feet which is the closest focusing distance for the 135L
i think this lens needs IS
and you are right about about the wider
when i use the 35L i had a good focus


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boerewors
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Jul 19, 2013 07:41 |  #11

In the first post you said even with the centre FP you were not getting much of a keeper rate. That leads me to beleive that its you and not the camera.


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bobbyz
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Jul 19, 2013 08:29 |  #12

boerewors wrote in post #16134172 (external link)
In the first post you said even with the centre FP you were not getting much of a keeper rate. That leads me to beleive that its you and not the camera.

That was in AI servo mode. Do you have 6d? I will post shots of kid running at me with camera in AI servo. Need to play with AI servo settings.


5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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bobbyz
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Jul 19, 2013 10:48 |  #13

BTW - Here is what I call a good shot.

IMAGE: http://www.bobbyzphotography.com/img/s10/v104/p1725930808-5.jpg

5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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amfoto1
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Jul 19, 2013 11:14 |  #14

bobbyz wrote in post #16134683 (external link)
BTW - Here is what I call a good shot.

QUOTED IMAGE

This looks to be at least one stop overexposed. But appears in focus to me... must be center AF point.

6D has only one dual-axis/cross type AF point... at the center. 5DIII has 41 dual-axis/cross type scattered around the viewfinder (five of the central points are diagonal/dual-axis/cross type). So I wouldn't expect the 6D's AF to perform as well as the 5DIII's.

Especially with a third party lens. There's no "future proofing" with third party lenses. Canon guarantees their L series to "be fully compatible with all EOS cameras past, present, and future". And Canon really works to prevent any compatibility issues with all of their lenses (besides the obvious such as EF-S lenses not being usable on FF).

There simply are no such guarantees with a third party lens. I seem to recall when the Siggy 85/1.4 was first introduced, it exhibited some issues with peripheral, single-axis points on some cameras. I think there was a recall and a lens firmware update done, but I forget the details.... you might do a search here on POTN for more info. Maybe these problems have resurfaced now that Canon has moved on to a couple all new AF systems in the 5DIII and 6D. Maybe you should check with Sigma and see if there are any fixes. You can find the lens' fimware version in an image's EXIF, I believe.


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bobbyz
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Jul 19, 2013 11:37 |  #15

Alan, top most point on the eye. Can't use center at f2 with 85mm.

35L behaving similarly. When it nails, it nails but nailing part with outer points seems lower than with 5dmk3. I will MA these two lenses and try again.

BTW - How do yo guys check over-exposed? I know I like kids shots little over-exposed but I don't see no over-exposure warnings on the face in LR. 1 stop lower will be lifeless shot IMHO.


5dmk3, 35L, 85L II, 300mm f2.8 IS I, 400mm f5.6
Fuji XT-1, 14mm f2.8, 23mm f1.4, 35mm f1.4, 56mm f1.2, 90mm f2, 50-140mm f2.8

  
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6d keeper rate when shooting f2 outer points
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