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FORUMS Photo Sharing & Visual Enjoyment Kids & Family
Thread started 30 Oct 2017 (Monday) 15:19
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I feel I am getting better shots

 
TeamSpeed
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Nov 05, 2017 06:54 |  #16

vinmunoz wrote in post #18488954 (external link)
Press the ISO button and turn the wheel on the back. it gonna act like EC.

Not on the 5d3...

That went into the 1dx series, the 7d2, 5d4, and other later model bodies. Of course perhaps Canon issued a later firmware enabling this, but I am not aware of this if so.


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vinmunoz
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Nov 05, 2017 11:27 |  #17

Try it. I think it works as far as i remember.


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TeamSpeed
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Nov 05, 2017 13:59 as a reply to vinmunoz's post |  #18

It doesn't without a firmware update, guaranteed. :)


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JJConstantine
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Jan 21, 2018 15:45 as a reply to post 18486151 |  #19

Excuse me? At iso 400 you are losing 3 bits of color sensitivity and over 1 bit of tonal range (something that is already a weakness of Canon) - one should always go for an optimum iso - lets see, all he had to do is drop 1/2000 to 1/500 to drop iso from 400 to 100


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davesrose
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Post has been last edited 1 month ago by davesrose. 2 edits done in total.
Jan 21, 2018 16:37 |  #20

No need to resurrect a thread and be rude. The OP's 5D3 DR does not drop over 1 bit at ISO 400, according to DXOmark:

Photographic Dynamic Range versus ISO Setting (external link)

Granted, newer Canons do have higher DR at base ISO.....but one needn't always shoot at ISO 100 if the scene doesn't make use of the full exposure range (and that's also what TS was implying).


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Pippan
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Jan 21, 2018 17:58 as a reply to post 18487445 |  #21

Hi Shaun, Wilt is the DOF guru and I expect he'll comment, but the cheat sheet you're developing looks to me unnecessarily complex. Lens focal length is not directly relevant to DOF. It's about aperture and framing (well, more correctly magnification of final image). This is because the longer the focal length the further from the subject you need to be to get the same framing, so the DOF works out the same.

Someone on the forum (and I apologise I can't remember who) posted an excellent and easy to remember short list of apertures they use for various framings to ensure necessary bits are in acceptable focus (the values in brackets are the approximate depths of field):

headshot f/8 (7 cm)
Head and shoulders f/5.6 (10 cm)
Waist up f/4 (14 cm)
Above knees up f/2.8 (20 cm)
Below knees up f/2 (28 cm)
Full body f/1.4 (40 cm)

Of course to get two kids in focus you'd have to stop down from these values unless they're both the same distance from the camera. To properly bokeh out the background I understand the rule of thumb is subject-background distance should be at least 3 times subject-camera distance.


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davesrose
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Jan 21, 2018 18:34 |  #22

Pippan wrote in post #18546083 (external link)
To properly bokeh out the background I understand the rule of thumb is subject-background distance should be at least 3 times subject-camera distance.

I think that's also conditional to how close the camera is to the subject. Further away, 1/3 of the DOF is in focus in front of the point of focus: while 2/3rds is in focus in back of the point. When you start getting close enough to be doing "macro", it's more like 1/2 by 1/2. For other elements that are not perceptually in focus....the further they are from the "accepted" DOF ("accepted" being variances from CoC) the less in focus they are. IMO, that's why it's good to think in generalities and try not to get tied up in absolutes.


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I feel I am getting better shots
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