File:Detail of white dove feather - rhachis with gap between barbs - DSG2101-1 - 2021-04-04 (magnification ratio 3x - HiRes).jpg

Summary[edit]

DescriptionDetail of white dove feather - rhachis with gap between barbs - DSG2101-1 - 2021-04-04 (magnification ratio 3x - HiRes).jpg	English: Macro image of the midsection of a white dove feather. The vertical rhachis (shaft) is the base from which parallel barbs protrude. Two disconnected barbs form a gap, thus displaying two kinds of barbules that hook up to form a perfect vane. The magnification ratio as compared to a full frame sensor is approx.1:3.0, i.e. 3x; the width of the image being approx. 12 mm. A series of images was processed as a HiRes focus stack that resolves both barbs and barbules across the image. Deutsch: Makroaufnahme: mittiger Detailausschnitt einer weißen Taubenfeder. Der vertikale Federschaft (Rhachis) bildet die Basis für die dicht gereihten Federäste. Die Lücke zwischen den Federästen ermöglicht die getrennte Ansicht der Bogen- und Hakenstrahlen. Vergößerungsfaktor im Vergleich zum Kleinbild-Sensor: ca. 1:3,0, also 3-fach.Die Bildbreite deckt mithin etwa 12mm ab. 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, 12:51:13
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

This picture won the 22 place in the Photo challenge Macro photography in May 2023.

NOTE: This image is a focus stacked image of "Macro image of the midsection of a white dove feather" consisting of 73 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） ∙ +/−

Quality image This image has been assessed using the Quality image guidelines and is considered a Quality image. العربية ∙ جازايرية ∙ беларуская ∙ беларуская (тарашкевіца) ∙ български ∙ বাংলা ∙ català ∙ čeština ∙ Cymraeg ∙ Deutsch ∙ Schweizer Hochdeutsch ∙ Zazaki ∙ Ελληνικά ∙ English ∙ Esperanto ∙ español ∙ eesti ∙ euskara ∙ فارسی ∙ suomi ∙ français ∙ galego ∙ עברית ∙ हिन्दी ∙ hrvatski ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ Jawa ∙ ქართული ∙ 한국어 ∙ kurdî ∙ Lëtzebuergesch ∙ lietuvių ∙ македонски ∙ മലയാളം ∙ मराठी ∙ Bahasa Melayu ∙ Nederlands ∙ Norfuk / Pitkern ∙ polski ∙ português ∙ português do Brasil ∙ rumantsch ∙ română ∙ русский ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ shqip ∙ српски / srpski ∙ svenska ∙ தமிழ் ∙ తెలుగు ∙ ไทย ∙ Tagalog ∙ Türkçe ∙ toki pona ∙ українська ∙ vèneto ∙ Tiếng Việt ∙ 中文 ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Additional Information[edit]

en: Macro image of the midsection of a white dove feather.

• The vertical rhachis (shaft) is the base from which parallel barbs protrude.
• Two disconnected barbs form a gap, thus displaying two kinds of barbules that hook up (as all others in this close-up) to form a perfect vane.
• The magnification ratio as compared to a full frame sensor is approx. 3.0:1, i.e. 3x; the width of the image being approx. 12 mm.
• Focus stack derived from 73 images, the lens being attached to a "Novoflex Castel-Micro" focusing rack and automatic stepper, advancing 0.03 mm between images.
• Very high resolution: barbules all across the image are 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: Makroaufnahme: mittiger Detailausschnitt einer weißen Taubenfeder.

• Der vertikale Federschaft (Rhachis) bildet die Basis für die dicht gereihten Federäste.
• Die Lücke zwischen den Federästen ermöglicht die getrennte Ansicht der Bogen- und Hakenstrahlen.
• Vergößerungsfaktor im Vergleich zum Kleinbild-Sensor: ca. 3,0:1, also 3-fach. Die Bildbreite deckt mithin etwa 12mm ab.
• Focus Stacking-Aufnahme aus 73 Einzelbildern.
• Sehr hohe Auflösung: die von den parallelen Federästen abgehenden Strahlen (Bogenstrahl und Hakenstrahl) sind 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.

Technical Details / Making of this Image[edit]

• 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: 73 images, magnification ratio 3.0:1 (1.0x).
• [4] Camera / lens settings: manual mode, electronic shutter, ISO 100, 1/20s, aperture 3.2, 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 0.0300 mm, resulting step 0.0297 mm, total distance covered 2.13 mm (from nearmost focus to the most distant focus spot), delay between images 6 sec., duration 10 min., stored 73 images, both as JPG and 16-bit 'Adobe RGB' RAW (.ARW) files.
• [6] Adobe Lightroom: imported all 73 16-bit 'Adobe RGB' RAW (.ARW) files (a) Applied current standard preset 005 (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 73 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. 12 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'.

Links[edit]

Wikipedia en: Flight feather

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

Wiki Commons: Illustration: components of a feather

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:

This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.

You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue