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Re: [OM] Idyll - Before the Fall

Subject: Re: [OM] Idyll - Before the Fall
From: "Piers Hemy" <piers@xxxxxxxx>
Date: Mon, 10 Jul 2017 10:25:51 +0100
WOW!

Am I right to assume that filenames ending ...fm have had Focus Magic
applied, Moose? But without that suffix, are out-of-camera?

I am dumbfounded!

Piers

-----Original Message-----
From: olympus
[mailto:olympus-bounces+piers.hemy=gmail.com@xxxxxxxxxxxxxxxxx] On Behalf Of
Moose
Sent: 09 July 2017 07:38
To: Olympus Camera Discussion
Subject: [OM] Idyll - Before the Fall

When responding to Jez' questions about possible µ4/3 kit for his wife, I
nattered on a bit about the flexibility, 
usefulness and quality of the  Oly and Panny long-normal zooms, 14-150 and
14-140.

The subject line is double duty; the quad of a Maine college on a perfect
day a month or two before the Fall of snow, 
and an idyllic day for us, visiting our friend Jef, who lives just a few
blocks from these scenes - just a week before 
Carol's Fall cut our vacation short.

I think these few shots illustrate how effective such a lens can be,
casually carried on a GM5, in this case. 
<http://zone-10.com/tope2/main.php?g2_itemId=22124>

The wide view is a four shot stitched panorama (maybe 150°), with Jef, in
his usual high energy mode, heading off to the 
next thing.

The others are all at the long end, 140 mm. I've included 100% samples of
the people pix, in one case, moving the 
subjects around for didactic purposes.

Yes, they are "sharpened". As I, and others far more authoritative, have
written, with various sorts of illustrations, 
digital sampling loses detail, including digital sampling using a camera
sensor, of the image formed on it by a lens. 
Then, Bayer arrays are about 50% efficient at color resolution.

So by the time we see the image on our screens, a great deal of the
resolution of the image produced by the lens has 
been 'lost'. That this is true is easy to prove using the HD mode of E-M5 II
and E-M1 II. Take the HD image, downsize it 
to match the pixel dimensions of regular, 16 MP image captured as part of
HD, and there is lots more clear detail in the 
downsampled HD version. I was quite startled at the difference when I first
tried this. My conclusion is that at least 
most of the AF µ4/3 lenses are considerably out-resolving the sensors
systems of contemporary µ4/3 cameras; the ones we 
think of as sharper doing so by a greater amount than others.

As it happens, the deconvolution algorithms in FocusMagic are rather good at
recovering a fair amount of this detail, 
particularly with the long end of long µ4/3 zooms. Long story ended; I think
these images @ 140 mm are inaccurate only 
in that they are less than perfect representations of the IQ of the lens
itself.

L. W. Moose

-- 
What if the Hokey Pokey *IS* what it's all about?
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