Good afternoon, Peter!
Don't confuse focus stacking with multi-shot hi-resolution images.
Focus stacking involves taking a series of images with different focus points,
and then stacking them with software that is similar to that used to create
multi-panel panoramas. The difference is that instead of matching them
horizontally, it matches the sharp bits, vertically, creating more apparent
depth of field. Any camera can be used for this, manually, using free or paid
software & your computer. Several Olympus models do it automatically. Mine
will shoot up to 15 shots in rapid succession, shifting the point of focus with
each one and then create the finished jpeg, in seconds, within the camera, as
well as keep a series of RAW images, in case one should want to do it
separately, in one's computer, to make, say, a TIFF for billboard use.
Hi Res images are a different kettle of fish. It involves moving the sensor
very accurately by 1/2 to 1+1/2 pixels at a time using the sensor shift
capabilities of in-body stabilization, enabling the camera to capture more data
than in a single-shot capture. The captured images are then merged, in software
similar to stacking software, to achieve a very high resolution image.
A good explanation can be found here:
https://chriseyrewalker.com/the-hi-res-mode-of-the-olympus-om-d-e-m1-mark-ii/
Hasselblad was the first with this, but now a number of cameras have the
capability. My Oly EM-1 Mk II, will create an 80mp image out of 20mp
sensor.... but it takes time, so the camera MUST be on a tripod and the subject
absolutely still. The new Oly EM-1x will do it hand-held, but with limitations
to shutter speed. So far, it is the only one with this capability, to my
knowledge.
Aram & Philippe have both posted images using focus-stacking. I have
experimented with it at the results are amazing.
I've never needed the hi-res mode, so never tried it. So, I've just gone and
shot a hi-res image of my messy living room. A couple of qick settings in the
menu and fire away. The camera "thought" about things for roughly 6 seconds,
and produced a 50mp file. I've only viewed it on the back panel display, but
at 14x magnification, the detail I can see is stunning! So, yeah, it does
work as seamlessly as they advertise!
Currently, models with pixel-shift hi-res modes are available from Hasselblad
(who were first with it), Pentax, Sony, Panasonic & Olympus. If someone knows
of others, please chime in!
Hope this helps.
David.
Good morning to everyone. I have some questions about "stacking" the------
same digital image to achieve a high resolution single image and I would
welcome comments from anyone.
I recall in the past that Aram and Philippe have posted images that
involved stacking, but at the time I didn't pay too much attention to
the details other than to note that the images were very nice. Now,
something that I read last night about the Olympus EM1 Mk II brought the
subject back to my mind.
In the text about the Olympus there was mention of a feature internal to
the camera that allowed for "stacking" identical images taken at a high
rate of speed to achieve a high resolution single image to a potential
resolution of 50 megapixels. Has anyone used that particular function on
an Olympus or any other make of camera that offers it for that matter?
Does it work as seamlessly as advertised by Olympus? Does the technique
have downsides and unspoken limitations that the Olympus text might have
neglected to mention?
Thanks.
Best regards,
Peter S.------
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