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Olympus OM-D EM-5 Discussion


brian1208 e2
11 10.6k 12 United Kingdom
5 Oct 2012 7:02PM

Quote:Brian1208, what IS setting do you use for you BIF are you panning to get the shot?


Re: panning to get the shot, it very much depends on the situation, most of the time I'm sticking with IS1 except where the birds are tracking across the sky very rapidly then its IS2 (I use the same approach as I do when shooting Aircraft)

A technique I am finding works well a lot of the time is to put it into IS1, single shot, SAF, pick the bird up in the EFV, half-press the shutter button to get first focus, then slowly track the bird more or less constanly half-pressing to keep focus until it gets to the position / action I want, then I fully press to take the shot

As an example of what can be achieved this way (although not as easily or consitently as with the 5Dmk2 + 70-300 LIS)

burrowing-owl-flight--1.jpg

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mikehit e2
5 7.1k 11 United Kingdom
5 Oct 2012 7:10PM

Quote:Dof is greater on full frame, comparing like to like ie a 50mm lens.


A very ambiguous statement.
Paul Morgan e2
13 16.1k 6 England
5 Oct 2012 7:13PM
Go figure, and check a few charts for yourself.

Example

5D 50mm lens @ f4 @ 10 feet dof = 2.94 ft

EP3 50mm lens @ f4 @ 10 feet dof = 1.45 ft
Carabosse e2
11 39.7k 269 England
5 Oct 2012 7:23PM
DoF calculators do seem to support what Paul says, although it may seem completely counter-intuitive.

All I know is my E-M5 and lenses can give me good deep DoF and good shallow DoF. Smile
mikehit e2
5 7.1k 11 United Kingdom
5 Oct 2012 7:32PM
I am presuming that is when producing the same size image from the two sensors: the EPL is being blown up twice as much as the 5D so you would expect a difference in DOF.
But if the EP3 has the framing you want... the 5D has twice the FOV which means you need to crop the 5D in half to get the same framing...and you end up magnifying the sensor image the same amount in both cases to get the final viewed image so the DOF will likely be the same for both cameras.

There are so many variables which make a simple sentence like yours very difficult to quantify.
brian1208 e2
11 10.6k 12 United Kingdom
5 Oct 2012 7:39PM
Colin, you got me looking back over my shots from my last Hawk Conservancy visit.

If the birds are big enough and the light is good it seems pretty easy to get reasonable & consistent focus lock.

this one was with the panning method as above

kites-a-pair.jpg



and these two were simply, locate, half-press / full press "grab shots"

vulture-approaching.jpg



vulture-approaching-1.jpg



as you can't really see how the focus accyracy is at this size on the web I've cropped down to the head detail of the last shot, as cropped with no added PP (a bit noisy but I haven't done any noise reduction and it is a massive crop of a 400 ISO image Smile )

vulture-approaching-1-head-crop.jpg

rogerfry e2
9 525 United Kingdom
5 Oct 2012 7:44PM
Taking a photograph from a set position, in order to get the same field of view, you would have to use a 50mm lens on m4/3 if you are using a 100mm lens on a full frame camera. At that point, the depth of field of m4/3 is greater than full frame by two stops.

Paul's examples are correct if using the same lens on both cameras, but he is ignoring the fact that the field of view is completely different.
Paul Morgan e2
13 16.1k 6 England
5 Oct 2012 7:47PM

Quote:DoF calculators do seem to support what Paul says, although it may seem completely counter-intuitive


The thing is CB, if we want the equi reach on 4/3 or M4/3 we pick a wider lens, the wider lens will always give you more dof.

But comparing a 50 against a 50, full frame will give you more dof to play with.
Carabosse e2
11 39.7k 269 England
5 Oct 2012 7:54PM
I gave up on 'M4/3 vs FF' DoF a while ago. Wink There are just too many variables.
rogerfry e2
9 525 United Kingdom
5 Oct 2012 7:56PM
We overlapped....we seem to agree Grin

(this was re Paul's post....not CB) Smile
mikehit e2
5 7.1k 11 United Kingdom
5 Oct 2012 8:19PM
[Quote]

But comparing a 50 against a 50, full frame will give you more dof to play with.


With same fov?
Paul Morgan e2
13 16.1k 6 England
5 Oct 2012 8:21PM

Quote:With same fov?


Your becoming quite anal, go check some charts Smile

5D 50mm lens @ f4 @ 10 feet dof = 2.94 ft

EP3 50mm lens @ f4 @ 10 feet dof = 1.45 ft
mdpontin e2
10 6.0k Scotland
5 Oct 2012 9:51PM
I hereby officially withdraw my question re. DoF on M43. Thank you, everyone, for your time and trouble which is much appreciated.
Smile
mikehit e2
5 7.1k 11 United Kingdom
5 Oct 2012 10:55PM

Quote:With same fov?

Your becoming quite anal, go check some charts Smile




Nope. Just recognising the importance of understanding what you are getting for your money without relying on bland mantras.
Paul Morgan e2
13 16.1k 6 England
6 Oct 2012 12:43AM
Lol well I don`t write Dof calculators, the clue is here underlined.

5D 50mm lens @ f4 @ 10 feet dof = 2.94 ft

EP3 50mm lens
@ f4 @ 10 feet dof = 1.45 ft

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