View allAll Photos Tagged focusstacking
fluorite crystals from Yongchung Mine, Xia Yang City, Provinz Fujian, Quanzhou China, FOV 5,8 cm, stacked with Helicon Pro,
A derelict wooden collapsing house or shed surrounded by trees. Regina Photo club field trip, NW of Regina, Saskatchewan, Canada. 13 November 2021
Continuing with botanical studies -a detailed photo of a grapevine tendril.
One hundred focus stacked images - 2 combined stacks.
Pentax K3, A* 200 f4 macro.
MCCP1731-1831 DPPS_tu5
in der Kälte aufgeplatzt, teilweise ausgetrocknet,
vielleicht auch von den wenigen gebliebenen Vögeln
als Nahrungsquelle genutzt
I've been looking for an economical solution to automate my field shooting and I've found on eBay this motorized rail for CNC machines at a cost below 50 €.
As you can see it is easily adaptable to photographic needs and has proven to be accurate beyond any expectation. All my last photos have been made with this and I've tried it up to a magnification ratio of 5: 1 and 20 micron step with great results.
Material: Sea glass (blue spectrum dominant)
Ocean-tumbled glass fragments with frosted surfaces and rounded edges
Colors determined by original manufactured glass sources (bottles, jars, tableware)
Color set (this image):
Aqua / cyan blue (common–less common)
Medium blue
Deep cobalt blue (rare)
Violet / lavender tones (rare)
One very dark piece (appears nearly black → could be very dark blue/purple glass)
Rarity context (relevant to this composition):
Cobalt blue and lavender/purple are considered rare sea glass colors
Blue shades originate from cobalt-containing glass or specialty containers like medicine bottles
Common colors (green, brown, clear) are absent here → this is a selectively curated, higher-value color grouping
Description
Arrangement: Tight cluster of rounded, thicker fragments
Form language:
Smooth, pebble-like shapes, worn
Less angular, more uniform erosion
Surface:
Fine, even frosting → indicates long tumbling
Micro-pitting visible under magnification
Color behavior:
Strong internal glow under lighting
Subtle transitions between blue → violet → near-black
Background: Black, reflective in places, adding depth and specular accents
Observations (material + process)
Pieces appear more mature than typical beach finds
Edges are highly rounded
Surfaces evenly etched
Thickness suggests origin from:
Bottles (aqua/blue)
Possibly tableware or decorative glass (purple tones)
The very dark piece likely transmits blue/purple when backlit (common with “black” sea glass)
Romneya coulteri, a southern California native plant growing in the yard,
After a fog-drippy night this summer,
San Luis Obispo Co., California
Snowy owl at Salsbury State Park in MA. I think a few others were able to better line the Snowy up with the moon. But the Snowy moved right when I was trying to set up so this was the best I could do.
Had to check the Great Horned Owl nest. Never noticed the third chick hiding on the left behind the larger gray one until today... Condie, Saskatchewan,Canada. 3 May 2020
This is a wobbly in camera 10 shot focus stack which Affinity has managed to align and then focus merge - just amazing.
This appears to be a close, backlit view of a translucent yellow-to-amber crystal mass. The image is dominated by angular internal planes, overlapping crystal faces, fractures, and small dark inclusions.
The central crystal is the clearest structural anchor: a large, blocky form with sharply defined faces surrounded by a dense mosaic of smaller intergrown crystals.
The lighting makes the specimen read almost like stained glass or frozen honey, with darker brown margins framing a brighter, more luminous center.
Discussion
Visually, it most closely resembles calcite or a similar translucent cleavage-rich mineral, because the crystal mass shows many non-cubic, slanted internal faces and a strongly fractured, rhombohedral-looking structure.
Calcite is well known for prominent rhombohedral cleavage, wide variation in color, and transparent to translucent forms, including yellow and honey-colored examples.
By contrast, fluorite is more associated with cubic crystals and perfect octahedral cleavage, which is not the dominant geometry here.
Based on the visible structure alone, honey/yellow calcite is the most plausible visual match, but an exact mineral ID is still not conclusive from the photograph alone.
Photographically, the strength of the image is its internal complexity.
It works less as a specimen-record shot and more as an abstract study of transparency, geometry, and light transmission.
The strongest visual elements are:
the bright central zone against the darker perimeter
repetition of angular planes
the large central crystal acting as a focal point
suspended inclusions and cracks that give scale and depth
What weakens it slightly as a pure abstract is that the brightest area at right approaches overexposure, while the upper edge has some darker, murkier zones that pull attention unevenly.
But overall it is visually rich and has strong texture, depth, and internal luminosity.