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Author Topic: High Resolution  (Read 4109 times)
tonygamble
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« on: April 22, 2017, 02:16:15 PM »

The Oly EM-5 Mark two has a picture taking mode called High Resolution.

It takes eight images and combines then into one. The resultant RAW is 100 mb.
http://www.imaging-resource.com/PRODS/olympus-e-m5-ii/olympus-e-m5-iiTECH2.HTM

If anyone wants to tinker with one of those RAW files I have put half a dozen on https://we.tl/ANUtn8t9Dw

There are views from the front and back window of our apartment and a picture of a vase of tulips I bought this morning.

I'd be interested in what DFS settings the wizards felt appropriate. I have a job to do in a month's time where high res would come in useful. If anyone takes the trouble to do anything with these files maybe they could put the filters on to WETransfer so we could try them.

Of course the system needs the use of a tripod and it does not tolerate movement. There is a bit of the latter in my shots in certain areas.

Tony
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Fred A
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« Reply #1 on: April 22, 2017, 03:52:58 PM »

Quote
If anyone wants to tinker with one of those RAW files I have put half a dozen on https://we.tl/ANUtn8t9Dw
Hi Tony,
Very interesting experiment. Is has a look of modified SNS applied to the picture.
At first look, it has quite a WOW factor. It appears so sharp that certainly no added DFS would be needed. The offset red flowers look like 3D on my screen.
I really wish Mike  was around to explain what he sees in proper terms.
But
On the negative side,
First Impression:  Oversharpened, Sky blown to smitherines but shows 253, 253, 253.   Black dots in water looking like sand. Screen snap is Magnifier in Refine and without magnifier.
... and also, it takes so long to process a raw change, I could go out for a sandwich and come back before the tick-tock sound that it finished.
It does react well to ODR in refine.
Tripod is one thing, but examining the trees and foliage, any whisper of a breath of air, and it loses itself.
I don't think that is for me.
If you want my qrs file, I will email it to you.
Fred

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admin
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« Reply #2 on: April 22, 2017, 04:10:53 PM »

Tony,

Thanks for sharing!

The shots are a bit difficult to work with because they are overexposed, but I do have some observations above and beyond that.  I see what Olympus is trying to do, but I don't think it has much real world application.  Olympus is faced with the fact that they need to compete against cameras like the D810 and 5D Mark IV that have 50+ megapixels on a full frame sensor.  They can't cram that many pixels into a small micro four thirds sensor so they give you a way to combine frames to get 64MP.  To me, that's just an advertising claim as that high res mode will only be good for indoor static shots; perhaps you can make use of it in very limited environments like shooting artwork.

So here's my suggestion: don't use that mode when shooting landscape shots or even portraits of people.  Only use it on a tripod indoors, shooting things like model trains, artwork, and the like.  When you use that mode to shoot landscapes, it ruins the depth of field because static objects like buildings will look relatively sharp while tree leaves, water, people walking, etc. will be very blurred in spots.  No amount of DFS will be able to correct for that and the sharpness inconsistency just makes the shot look "weird".

For landscape shots, just shoot in the regular 16MP mode as you'll get much better results than combining 8 frames over a full second to try to "emulate" one 64MP shot.  The E-M5 series is a competent series of cameras without the HR mode and 16MP is more than enough for just about any shot.  People get hung up these days comparing megapixels when 16MP will more than do the job unless you are printing billboards.  Use that HR mode sparingly!

Regards,
Mike
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tonygamble
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« Reply #3 on: April 22, 2017, 04:47:32 PM »

Thanks Fred and Mike,

Yes, they are overexposed. I tend to with the EM5 most of the time as I am better at recovering highlights than filling the shadow - but that's me. Maybe the hi-res does not like me doing it. You can probably see what I did in the EXIF.

The river is a good test for the problem of movement. It almost looks like glass in the shots and it was certainly not that calm this morning. And the shots from our rear window have trees that were certainly moving slightly.

Oh well I have experimented.

Whilst they were around I bought three Sigma Merrill DPs. Three different focal lengths for under 1,000 UKP. I use those for my product shots and those rare occasions when I can use a tripod and get people to stand still. They are pigs to use. Do you remember shutter lag - well the Merrill has re-introduced it !

And batteries. They use the same as I have in my Ricoh for a whole day on holiday and they say 'please sir can I have some more' after about twenty shots.
Sadly QU cannot see the RAWs but the Sigma software does a good job and I keep all three in a camera bag for special occasions as, given luck, a fair wind and the patience of Job they do take nice snaps. Otherwise it will be EM5 mk 2 all the time.

Thanks for your comments and interest.

As they say I have been there and got the T shirt. Now I can move on.

Tony


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