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Olympus OM-D EM-5 Discussion

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brian1208
brian1208 e2 Member 1110227 forum postsbrian1208 vcard United Kingdom12 Constructive Critique Points
5 Oct 2012 - 7:02 PM


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

Last Modified By brian1208 at 5 Oct 2012 - 7:12 PM
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5 Oct 2012 - 7:02 PM

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mikehit
mikehit  56297 forum posts United Kingdom9 Constructive Critique Points
5 Oct 2012 - 7:10 PM


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

A very ambiguous statement.

Paul Morgan
Paul Morgan e2 Member 1315156 forum postsPaul Morgan vcard England6 Constructive Critique Points
5 Oct 2012 - 7:13 PM

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

Last Modified By Paul Morgan at 5 Oct 2012 - 7:14 PM
Carabosse
Carabosse e2 Member 1139395 forum postsCarabosse vcard England269 Constructive Critique Points
5 Oct 2012 - 7:23 PM

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
mikehit  56297 forum posts United Kingdom9 Constructive Critique Points
5 Oct 2012 - 7:32 PM

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
brian1208 e2 Member 1110227 forum postsbrian1208 vcard United Kingdom12 Constructive Critique Points
5 Oct 2012 - 7:39 PM

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

Last Modified By brian1208 at 5 Oct 2012 - 7:43 PM
rogerfry
rogerfry e2 Member 8504 forum postsrogerfry vcard United Kingdom
5 Oct 2012 - 7:44 PM

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
Paul Morgan e2 Member 1315156 forum postsPaul Morgan vcard England6 Constructive Critique Points
5 Oct 2012 - 7:47 PM


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.

Last Modified By Paul Morgan at 5 Oct 2012 - 7:48 PM
Carabosse
Carabosse e2 Member 1139395 forum postsCarabosse vcard England269 Constructive Critique Points
5 Oct 2012 - 7:54 PM

I gave up on 'M4/3 vs FF' DoF a while ago. Wink There are just too many variables.

rogerfry
rogerfry e2 Member 8504 forum postsrogerfry vcard United Kingdom
5 Oct 2012 - 7:56 PM

We overlapped....we seem to agree Grin

(this was re Paul's post....not CB) Smile

Last Modified By rogerfry at 5 Oct 2012 - 7:58 PM
mikehit
mikehit  56297 forum posts United Kingdom9 Constructive Critique Points
5 Oct 2012 - 8:19 PM


Quote:

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

With same fov?

Paul Morgan
Paul Morgan e2 Member 1315156 forum postsPaul Morgan vcard England6 Constructive Critique Points
5 Oct 2012 - 8:21 PM


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

Last Modified By Paul Morgan at 5 Oct 2012 - 8:21 PM
mdpontin
mdpontin  106016 forum posts Scotland
5 Oct 2012 - 9:51 PM

I hereby officially withdraw my question re. DoF on M43. Thank you, everyone, for your time and trouble which is much appreciated.
Smile

mikehit
mikehit  56297 forum posts United Kingdom9 Constructive Critique Points
5 Oct 2012 - 10:55 PM


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
Paul Morgan e2 Member 1315156 forum postsPaul Morgan vcard England6 Constructive Critique Points
6 Oct 2012 - 12:43 AM

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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