DescriptionDetail of pale white dove feather - horizontal rhachis with gap between barbs - DSG2033-1 - 2021-04-04 (HiRes).jpg	English: Midsection of a pale white dove feather. The rhachis (shaft) is arranged horizontally with closely intertwined barbs above and below. As found, one row of barbs remained disconnected, forming a gap. A series of images was processed as a HiRes focus stack that resolves every single barbule across the image. Deutsch: Detailausschnitt einer fahlweißen Taubenfeder. Vom querliegenden Federschaft (Rhachis) zweigen die dicht gereihten Federäste ab. Die Lücke zwischen den Federästen war schon bei der Entdeckung vorhanden. Die initiale Bilderserie wurde per Fokus Stacking zu einem äußerst detailreichen Bild zusammen gesetzt, in dem jeder einzelne von den Schäften abgehende Strahl (Bogenstrahl und Hakenstrahl) im Detail sichtbar ist.
Date	4 April 2021, 12:24:14
Source	Own work
Author	Franz van Duns
Taken with InfoField	This photo was taken with Sony ILCE-7RM4
Taken with InfoField	This photo was taken with Canon MP-E 65mm F2.8 1-5x Macro

Camera location	51° 28′ 48″ N, 7° 33′ 00″ E	View this and other nearby images on: OpenStreetMap	51.480000; 7.550000

NOTE: This image is a focus stacked image of "Midsection of a pale white dove feather" consisting of 32 images that were merged using Zerene Stacker Version 1.04 Build T2022-04-21-0715 (licensed). As a result, this image underwent digital manipulation which may have included blending, blurring, cloning, and colour and perspective adjustments. As a result of these adjustments, the image content may be slightly different than reality at the points where the images were combined. This manipulation is often required due to lens, perspective, and parallax distortions. العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ 日本語 ∙ македонски ∙ português do Brasil ∙ русский ∙ slovenščina ∙ ไทย ∙ українська ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

en: Midsection of a pale white dove feather.

• The rhachis (shaft) is arranged horizontally with intertwined barbs above and below.
• Just as when found, one row of barbs remains disconnected, forming a gap.
• Focus stack derived from 32 images.
• Very high resolution: every single barbule across the image is resolved in fine detail.
• Feather components: refer to Illustration: components of a feather
• Image series taken in Aplerbeck, Dortmund, Germany in April 2021.

See below for technical details concerning the "making of" this image.

de: Detailausschnitt einer fahlweißen Taubenfeder.

• Vom querliegenden Federschaft (Federkiel, Rhachis) zweigen dicht gereihte Federäste ab.
• Die Lücke zwischen den Federästen war schon bei der Entdeckung vorhanden.
• Focus Stacking-Aufnahme aus 32 Einzelbildern.
• Sehr hohe Auflösung: jeder einzelne von den Schäften abgehende Strahl (Bogenstrahl und Hakenstrahl) ist im Detail sichtbar.
• Bestandteile einer Flugfeder: siehe Darstellung der Einzelbestandteile einer Feder
• Aufgenommen in April 2021 in Aplerbeck, Dortmund, Deutschland.

Technische Daten zum Bild: siehe nachfolgende Beschreibung im englischer Sprache.

• Focus stacked image.
• [1] Camera: Sony ILCE-7RM4, 61 Mpixels, sensor size 9504x6336.
• [2] Lens: Canon MP-E 65mm f/2.8 1–5x Macro + Metabones Canon EF to Sony FE adapter.
• [3] Scope: 32 images, magnification ratio 1:1.0 (1.0x).
• [4] Camera / lens settings: manual mode, electronic shutter, ISO 100, 1/50s, aperture 5.0, bias (=exposure compensation) 0.00, WB (white balance) 5600K, colour space 'Adobe RGB'.
• [5] FOCUS STACK recording: camera attached to focusing rack / automatic stepper Novoflex Castel-Micro, step set to 0.2000 mm, resulting step 0.1969 mm, total distance covered 6.10 mm (from nearmost focus to the most distant focus spot), delay between images 6 sec., duration 3:12 min., stored 32 images, both as JPG and 16-bit 'Adobe RGB' RAW (.ARW).
• [6] Adobe Lightroom: imported all 32 16-bit 'Adobe RGB' RAW (.ARW) files (a) Applied current standard preset 004 (WB, tint:unaltered, Exposure+0.91, Presence: Texture+30 Clarity+30 Vibrance+5 Saturation+3, Sharp: Amount+70, Radius:1.0 Detail:25 Masking:20, NoiseRed: Lum:50 Detail:50 Contrast:0 Color:30 Detail:50, Smooth:50, LensCorr:all) (b) Subsequent changes (final values stated): Exposure:0.0 Contrast-40 (c) exported as TIFF/16bit, 'ProPhoto-RGB' colour profile.
• [7] FOCUS STACK processing: (a) tool 'Zerene Stacker' 1.04 (b) stacked all 32 TIFF images via 'PMax' method (c) Stacking artefacts:NO, i.e. no focus-based retouching required at this stage (d) exported as one TIFF/16bit 'ProPhoto-RGB' image.
• [8] Adobe Photoshop: (a) imported stacked TIFF/16bit image, explicitly preserving embedded colour space 'ProPhoto-RGB' (b) removed sensor specks and visible specks of dust and strands (c) mask: NO (d) tone curve: 50>44, 140>189, 192>255 (e) enhanced sharpness:NO (f) rotated: NO (g) cropped: NO (h) saved as PSD file (i) exported as JPG max. quality file (6 of 7) with embedded 'sRGB' colour profile.
• [9] Dimensions: width of image: approx. 36 mm.
• [10] ExifTool: added user-related tags and reimported technical tags from both original .ARW and intermediate .TIF files that hat been discarded during Photoshop EXPORT-AS-JPG processing.
• [11] Wiki Commons categorisation: 'Category:Feather barbs'.

Wikipedia en: Flight feather

Wikipedia de: Feder#Konturfedern, siehe dort Zeichnung rechts: Schematischer Bau der Konturfeder

Wiki Commons: Illustration: components of a feather

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