On 1/19/2018 5:52 AM, Frank wrote:
Please do, Moose. As I liked the feature in some recent mushroom shots
<https://www.flickr.com/photos/63142137@N08/albums/72157689466783056>.
Sigh . . .
REMEMBER, Oly terminology is different than the rest of the photographic world! People have been using the term "focus
stacking" forever. Oly is semantic/technically correct in calling that function that they have automated in these
cameras "Focus Bracketing" Then they go and use the term "Focus Stacking" particularly for the combination of taking a
set of focal plane slices and composting them into one all in-camera.
My negative comment only applies to the in-camera stacking. It is entirely possible that the linked mushroom photos you
admire are actually Brackets, not in-camera Stacks, and his labeling is imprecise.
-------------------------------------
From manual and web site:
Focus BKT (Focus Stacking)
The focus position is automatically shifted to capture 8 shots which are
then composited for a
single JPEG image that is in focus all the way from the foreground to
background.
- JPEG only
• The focus position is automatically shifted based on the
center of the focal position and 8 frames are captured in a
single shot.
• If compositing fails, the image will not be saved.
- Oops. With Bracketing, you always get the intermediate images. (My TG-4 does Focus Stacking and Bracketing in
Microscope Mode. At least when it Stacks, "Two images are recorded, the first frame and the composite image.")
• Focus stacking ends if zoom or focus is adjusted during
shooting.
• The angle of view for composited images is narrower than
the original images.
- Huh?
Compatible with :
M.Zuiko Digital ED 60mm f/2.8 Macro
M.Zuiko Digital ED 12-40mm f/2.8 PRO
M.Zuiko Digital ED 40-150mm f/2.8 PRO
M.Zuiko Digital ED 30mm f/3.5 Macro
M.Zuiko Digital ED 7-14mm f/2.8 PRO
M.Zuiko Digital ED 8mm f/1.8 Fisheye PRO
M.Zuiko Digital ED 300mm f/4.0 IS PRO
- Oh, goodie, I have ONE of those. Doesn't work with my 12-100/4 Pro, 12/2, 25/1.8, 45/1.8, 75/1.8, 9-18, 12-50, 14-42,
75-300 or any of my several Panny lenses.
Eight slices is seldom enough. My most usual setting, 15, is not uncommonly too few. You can increase the depth by
setting the Focal Distance higher. The problem then is "waves" of in and slightly out of focus. It also increases with
smaller apertures, but that often requires compromises of shutter speed and/or ISO.
------------------------------
Speaking of mushroom shots; From an essay on the US Oly website:
FOCUS STACKING AND BRACKETING WITH THE E-M1 MARK II
BY OLYMPUS VISIONARY PETER BAUMGARTEN
"BRACKETING VS. STACKING
I have found the built-in focus stacking to be remarkably accurate. So why would you opt for bracketing vs. stacking?
Here are a couple of reasons:
The stacked image is trimmed. Regardless of subject, which lens you use, or whether you use a tripod or not, the
final stacked image is trimmed along all four edges. The final image remains the same size (5184 x 3888px for the E-M1
Mark II), which means some interpolation must be going on. This must be taken into account when composing the shot.
Details vs distance. The fungus below had countless stalactite-like fingers and was about 15 cm from front to back,
a fair distance for a macro shot. I attempted to use the stacking feature, which only brackets and stacks 8 photos.
After some experimenting with the focus differential settings I had to compromise. I could capture the details of the
front fingers but loose the details in the back, or I could capture the entire distance, but have too much interpolation
that would blur out some of the fingers. Not willing to compromise I opted to use bracketing instead."
In other words, it doesn't even please one of their "visionaries"
<http://www.getolympus.com/us/en/focus_stacking>
------------------------------
One common problem with stacking is subject movement. Both of my common subjects, flowers and "bugs", have this
distressing tendency to move while the set of exposures is being made. This creates "ghosts", overlaps, etc. With Focus
Stacking, any artifacts are baked into the one JPEG.
With Focus Bracketing, the whole set is available and is to be aligned and blended in post. In PS, that gives me great
control in correcting them. Yep, most outdoor shots require a bit of TLC.
Thnx in advance!
OK, you owe me a beer. ;-)
Well Bracketed Moose
--
What if the Hokey Pokey *IS* what it's all about?
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