#photography with a focus on #nature, #wildlife and #birds, but I dabble in everything from #landscape to #macro. I prefer #FOSS to manage and edit my photos, including #Fedora, #digiKam, #RawTherapee, #Darktable, #GIMP, #RapidPhotoDownloader and #ExifTool.
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2026-08-14T08:38:57Z Event JSON
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Last Notes npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis This is my attempt at processing James Webb Space Telescope (JWST) data of Sh 2-305. It is an emission nebula usually visible in red (H II emission), but it is displayed here in false-color infrared. Blue areas emit higher-energy photons than red regions. This area is a stellar nursery where gas and dust remnants from supernovae or collisions form new stars. The three versions show the nebula only, with galaxies only, and with everything else. A great deal of work went into creating a clean nebula image with as few artifacts as possible. After data extraction and initial stretching with #Siril, the single monochrome filter images were combined, processed, and cropped in #GIMP. The combined image was then run through #StarNet++ to remove most of the stars. Since StarNet++ does not work well with JWST data, it leaves artifacts for every star, especially the brighter ones, whose long spikes typical of JWST overlay large parts of the image. I therefore had to remove each star artifact manually using the clone and healing tools in GIMP. This took tens of hours to complete. #GMIC additionally helped reduce banding. As such, this is an artistic interpretation by me and is not scientifically accurate. The full resolution versions can be downloaded from https://www.picturavis.com/index?/tags/1204-jwst (these JWST images are crazily detailed). The person responsible for this JWST proposal is Mark McCaughrean of the Max-Planck-Institut für Astronomie in Heidelberg. He also shared an initial version of the uncropped processed image: https://www.flickr.com/photos/markmccaughrean/55209728128/ Attribution: NASA/ESA/CSA Telescope: JWST/NIRCam Proposal ID: 4547 Observation description: The stellar & sub-stellar initial mass function in Sharpless 305: imaging Release date: 02.04.2026 Filters (mapping): F140M (blue), F150W+162M (light blue), F182M (blue-green), F212N (green), F300M (light green), F335M (yellow), F360M (orange), F444W (red) #Sharpless305 #Sh2305 #JWST #JamesWebb #NIRCam #Nebula #SpaceTelescope #astrophotography #DeepSky #DigiKam https://pixelfed.de/storage/m/_v2/1483/0d402c64b-2701fc/pDAWHc69YKQk/LGtoDo9Xp7c2znAayNZYzb9COD9lgzaaG7QTYo74.jpg https://pixelfed.de/storage/m/_v2/1483/0d402c64b-2701fc/Gdd38ZRcf62P/TgOxNcpwld4eJSfZLqOOD6RL37ffUFPylyEj00Ak.jpg https://pixelfed.de/storage/m/_v2/1483/0d402c64b-2701fc/pExZNVpi7Ote/UPZZmdMNw6ZMPBNmnrVtcZTVN9xHYRrzgJOT0HCP.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Milky Aurora Shower 2.0 This is a second attempt at a composite taken during the Perseid shower in 2024, which coincided with a spectacular auroral display. The aurora and the foreground are from one photo, and the Milky Way was stacked from 114 × 10 s exposures of the same series using #Siril, #GraXpert and #StarNet. Twelve meteors that were photographed in the same scene were manually registered onto the composite and scaled up for better visibility. Most of the compositing was done in #GIMP and the RAW processing of the aurora and the meteor images was done in #Darktable. Compared to the original processing, I increased the visibility of the Milky Way with a new Siril stacking and processing attempt, composited both images differently via GIMP, and increased the size of the meteors so they are actually visible. The original version can be found here: https://www.picturavis.com/picture?/282/category/37-astrophotography Nikon D500, Tokina AT-X 11-20 f2.8 PRO DX, 12 mm, f2.8, 10s, ISO 3200, tripod #nature #aurora #NorthernLights #MilkyWay #perseids #meteorites #photography #astrophotography #germany #digikam https://pixelfed.de/storage/m/_v2/1483/0d402c64b-2701fc/BG72jck0CjmQ/jBmayR4PNipSsygAk6hmMMbN2c0locsbBdXeIpeY.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Gamma Cygni Nebula The Sadr Region around the central star Sadr (γ Cygni) in the Cygnus constellation contains the large H II nebula, Gamma Cygni Nebula (IC 1318). This nebula is partly obscured by dust, creating the Butterfly Nebula (IC 1318B) in the lower left of the image, just below Sadr. Many other objects can be seen, including multiple star clusters and, most notably, the Crescent Nebula (NGC 6888) to the right of the center of the image. This image was created with 2,984 × 2 s (1 h 39 min 28 s) integration time. Post-processing was done with #Siril, #GraXpert, #StarNet++, and #GIMP. This time I documented the whole process in my #blog. If you have a camera, this is for you (no guarantees, though; I just fail along until it works for me): https://blog.picturavis.com/astrophotography-without-equipment/ Nikon D500, Sigma 105mm EX DG OS HSM, 105 mm, f/2.8, 2984x2 s, ISO 3200, tripod, no tracker #Nebulae #Sadr #ButterflyNebula #GammaCygniNebula #CrescentNebula #astrophotography #photography #SilentSunday #germany #digikam https://pixelfed.de/storage/m/_v2/1483/0d402c64b-2701fc/lfG6zpAnDZIS/el0M38Kegde2o0EOmPnWIYNpSCbtbKwP1fKfVB49.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Santa Marta Antpitta The endangered Santa Marta antpitta lives only on the Sierra Nevada de Santa Marta mountain range in Colombia. It lives and feeds on the forest floor at elevations above 1,000 meters. This individual is a shy regular at a nature reserve station at 2,560 meters, where it is regularly fed by a ranger. Grallaria bangsi | Santa Marta antpitta | Ockerkehl-Ameisenpitta Nikon D500, Sigma 150-600mm C, 370 mm, f/6, 1/100 s, ISO 500, handheld #bird #wildlife #nature #photography #colombia #digiKam #darktable https://pixelfed.de/storage/m/_v2/1483/ffe7c43a6-a8b5f2/eg2CLUYMl1hl/LgVYM2hIyLp7ghVdhqwKXNr0enL6OdXqIh7IGBmy.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis My snow cone! Falco tinnunculus | Common kestrel | Turmfalke Nikon D500, Sigma 150-600mm C, 600 mm, f/6.3, 1/500 s, ISO 280, handheld #bird #wildlife #nature #photography #germany #digiKam #Darktable #GIMP https://pixelfed.de/storage/m/_v2/1483/ffe7c43a6-a8b5f2/tpv4x3jABELJ/YWSoU7pLDXhMPs2qTAzdUuRNr8TIXqIF752rqKn7.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Snowy Tree #SilentSunday #landscape #snow #pond #tree #photography #germany #digiKam #darktable https://pixelfed.de/storage/m/_v2/1483/ffe7c43a6-a8b5f2/rZH27hQHJ20o/w3muZypaZCjkOHfo8HhfFd621teH0wDVdMvwLdWc.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Cat's Paw Nebula This is my attempt at the James Webb Space Telescope data of the Cat's Paw Nebula NGC 6334. Many stars were removed or oversaturated in the filter data downloaded from MAST, resulting in a lot of artifacts in the short- and long-wavelength composite images created with #Siril. I combined both images in #GIMP and tried to fix some of the artifacts. After different tries, also on the raw data, I decided to run #StarNet++ on the combined FITS file created with GIMP and then painstakingly clean the rest (felt like 10000) of the star artifacts up. I tried to stay true to the nebula by interpolating what the area behind and around the stars most likely looks like. GIMP's heal brush worked really well, but it took many hours to complete. The full-resolution image can be seen on my website when choosing the original size in the upper right corner (warning: it is 77 MB in size): https://www.picturavis.com/picture?/391/categories Telescope: JWST/NIRCam Proposal ID: 6778 Observation description: NIRCam observations of a star forming nebula Release date: 10.07.2025 Filters: F090W (blue), F187N (light blue), F200W (blue-green), F277W (yellow-green), F335M (yellow), F444W-F470N (red) #CatsPawNebula #NGC6334 #JWST #JamesWebb #NIRCam #Nebula #SpaceTelescope #astrophotography #DeepSky #DigiKam https://pixelfed.de/storage/m/_v2/1483/3dc769ff5-aadbb1/HPvaqLkUSu9S/bTVeKMcHrH855SHA3BHwQErOafUGPOABB2vqCWOj.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Southern Emerald-Toucanet We were hiking along a trail in the El Dorado Nature Reserve when I noticed the weird shape of a tree trunk from the corner of my eye. Since I had learned to point my camera at everything weird, this toucanet looking out of a tree cavity greeted me through the viewfinder. Aulacorhynchus albivitta | Southern Emerald-Toucanet | Weißkehlarassari Nikon D500, Sigma 150-600mm C, 600 mm, f/6.3, 1/500 s, ISO 2500, handheld #bird #nature #photography #colombia #digiKam #darktable https://pixelfed.de/storage/m/_v2/1483/33cc9b949-339791/DGOR9xfyq0YN/tJwTXKZFkLU0Gjcm9luQJWmP2om3vQEEDoKr2uXG.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Mirror, mirror on the floor Mirror, mirror on the floor - who's the fairest of them all? It's the black-necked stilt, of course - which I watched without remorse! Himantopus mexicanus | Black-necked stilt | Amerikanischer Stelzenläufer Nikon D500, Sigma 150-600mm C, 600 mm, f/6,3, 1/2000 s, ISO 450, handheld #reflection #bird #nature #photography #colombia #digiKam #RawTherapee https://pixelfed.de/storage/m/_v2/1483/4f692c7f1-e20d1b/GFieQDJl6XnB/xgv6MNg78ZJ6MhnLTh7y2gVWqXCd36QXmGofw53a.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Glossy Flowerpiercer A Glossy Flowerpiercer piercing a glossy flower. Not as colorful as all the hummingbirds flying around above it, but nevertheless interesting to see. Diglossa lafresnayii | Glossy flowerpiercer | Stahlhakenschnabel Nikon D500, Sigma 150-600mm C, 600 mm, f/6.3, 1/2500 s, ISO 2200, handheld #bird #flower #nature #photography #colombia #digiKam #RawTherapee https://pxlfdde.fsn1.your-objectstorage.com/public/m/_v2/1483/208209554-471e9e/wh5QJECBEeGH/PHlgH9nAmONVix6w2EHWfcFLV5zsTU5xYI7Xtdus.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Dew Lantern Photographing in the morning hours is a bliss. The weather forecast said it would be overcast, but I went outside anyway. When the sun came out, every blade of grass had a single dewdrop with a tiny sun in it, shimmering in the ground fog. Worth the lost hours of sleep. Nikon D500, Sigma 105mm EX DG OS HSM, 105 mm, f18 (effective), 1/320, ISO 100, propped on backpack #macro #macrophotography #dewdrops #dew #FineArt #FineArtPhotography #SilentSunday #photography #germany #digiKam #GIMP https://pxlfdde.fsn1.your-objectstorage.com/public/m/_v2/1483/549719332-a3f277/4VVLytj4GeEW/B0b6MvXHuj2wa1t9ZX5Dky2Dx8ac1B0OnWTpdEAC.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Golden Starlings This photo was taken in August 2022 in the Swedish nature reserve Högenäs orde. The sun rose through the morning mist, creating an ethereal golden glow, while a group of starlings rested on the rocks in the water. Sturnus vulgaris | Common starling | Star Nikon D500, Sigma 150-600mm C, 600 mm, f8, 1/1000 s, ISO 100, handheld #nature #bird #photography #sweden #digikam #RawTherapee https://pixelfed.de/storage/m/_v2/1483/0bb057b62-db9a0d/qCIBZgkgmxQm/5E3xyAdim4XkBKco6KLor3JKuxQDMi0J0GBRcACg.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Comet Close-Up This image was created using Siril and GIMP from 45 photos of the comet C/2023 A3 Tsuchinshan–ATLAS. I do not have a tracker, so I had to resort to relatively short exposures of 0.5 seconds and manually adjust the camera to keep up with the earth's rotation. The photos were taken over a period of about 3.5 minutes, for a total exposure time of 22.5 seconds. The small streaks seen beside the comet are stars. The comet is so fast, that even in this short time the background becomes blurred. Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 45x1/2 s, ISO 3200, tripod #comet #comet2023a3 #photography #astrophotography #germany #digikam #Siril #GIMP https://pixelfed.de/storage/m/_v2/1483/19c3981d1-f52fd9/MfTTKFZUTmZP/NPvMtiA276FeKPx2TxBOpwqqlNPpTW4RyZQ3XiHD.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Comet Tail The comet C/2023 A3 Tsuchinshan–ATLAS with its very long tail. Due to clouds, it was nearly invisible to the naked eye, but I was able to get a few shots with different lenses. The tail was longer than I expected, so it was difficult to frame. Nikon D500, Nikkor 50mm f/1.8G, 50 mm, f2,8, 5s, ISO 800, tripod #nature #comet #comet2023a3 #landscape #photography #astrophotography #germany #digikam #RawTherapee #GIMP https://pixelfed.de/storage/m/_v2/1483/19c3981d1-f52fd9/6G3Aq3rV1IYc/N8LDfIEWztZdI7eeGsUj3N0TZnajCwx0pJle6IQG.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Aurora Moonset The moon was setting opposite of the aurora, leading to the pinkish glow overlapping the dark blue sky. Nikon D500, Tokina AT-X 11-20 f2.8 PRO DX, 11 mm, f2,8, 30s, ISO 200, tripod #nature #moon #moonset #aurora #NorthernLights #landscape #photography #astrophotography #germany #digikam #darktable https://pixelfed.de/storage/m/_v2/1483/19c3981d1-f52fd9/KwbH890dpXR9/mlm4w6yz4waXSfBezbwTx0enC3VZCoW7wUIOe0DD.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Baltic Aurora The solar activity this year has been phenomenal for aurora photography. This is the third aurora I have seen and captured in Germany, this time on the Baltic coast of the island of Fehmarn. Nikon D500, Tokina AT-X 11-20 f2.8 PRO DX, 11 mm, f2,8, 10s, ISO 400, tripod #nature #aurora #NorthernLights #landscape #photography #astrophotography #germany #digikam #darktable #GIMP https://pixelfed.de/storage/m/_v2/1483/19c3981d1-f52fd9/hS6I4MbaGcWq/RspwREmtgKuioxIFWP9F10yNAXhDggTaeTLQNs3L.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Basalt Column Peninsula These basalt columns are part of the spectacular Jogasaki Coast on the Izu Peninsula in Japan. They formed about 4000 years ago after an eruption of Mount Omuro. The lava flowed into the ocean, causing it to cool into these hexagonal columns. Nikon D500, AF-S DX NIKKOR 16-85mm F3.5-5.6G ED VR, 40 mm, f7.1, 1/640s, ISO 500, handheld #landscape #pacific #geology #basalt #cliff #photography #japan #digikam #darktable https://pixelfed.de/storage/m/_v2/1483/586f75268-5004eb/aRVjVc6qrTy2/lsiKGPGax3NIWRWQ8wgn2N0RDFYLMZzP1lQar25L.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Milky Aurora Shower This composite was taken during the Perseid shower, which coincided with a spectacular auroral display. The aurora and foreground are from one photo and the Milky Way was stacked from many images of the same series using #Siril. 12 (barely visible) meteorites, that were photographed in the same scene, were (roughly) registered onto the composite. Compositing was done in #GIMP, RAW processing of the aurora and the meteorites was done in #Darktable. The greatest challenge was compositing the aurora on top of the stacked Milky Way. During the stacking process, the auroras were also stacked, resulting in a combined auroral glow that was much larger than the aurora of the single image I had chosen. Nikon D500, Tokina AT-X 11-20 f2.8 PRO DX, 12 mm, f2.8, 10s, ISO 3200, tripod #nature #aurora #NorthernLights #MilkyWay #perseids #meteorites #photography #astrophotography #germany #digikam https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/Nn1PLHdUY3RV/MSNlG1m5fNmmRJYgsN8qxj1OCniYJ2Yh4fHIZh9O.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Sleeping in the rain This female Red-backed Shrike was dosing on her perch next to the trail, determined not to be disturbed by a random human or some pesky raindrops. Lanius collurio | Red-backed shrike | Neuntöter Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 1/500, ISO 500, handheld #bird #rain #nature #photography #denmark #digikam #RawTherapee https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/WENmFDRl7VfZ/oUvSD0W9pjdtmScK7h5axxmqvEDOjhWi3ki5ofWg.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Look into my eyes The European peacock butterfly has several defense mechanisms against its predators. With its wings folded, its brown underside makes it look like an old leaf. When threatened, it can open its wings to expose the large eye-like spots on its wings to scare off predators. A simultaneous hissing sound enhances the deterrent effect. Aglais io | European peacock | Tagpfauenauge Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 1/500, ISO 140, handheld #insect #butterfly #photography #germany #digikam #darktable https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/7xcZT3ql07Bz/lsEBuwfRQpARNqOTeetDVrVkBlNTHLZ6ezoTSIZB.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis One with the wheat Capreolus capreolus | Roe deer | Reh Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 1/500, ISO 180, handheld #mammal #deer #field #photography #germany #digikam #darktable https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/DLntSUlBmuOF/46rfc5Rd0ktUp7cGr0rv9np09fFwAB2g3mPCaUXd.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Legged cotton ball Many ringed plovers and other wading birds were on the remote beach of Nationalpark Vadehavet in Denmark. Ringed plover chicks, like the one photographed here, are well camouflaged on the beach and almost invisible when standing still. Charadrius hiaticula | Common ringed plover | Sandregenpfeifer Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 1/2000, ISO 160, handheld #bird #beach #photography #denmark #digikam #darktable #gimp https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/Lz21UNAYIPNV/SoRzvFyYDJ644wrQqLn76cNrnA4qdAZzChlQd4DR.jpg npub1kl8p08ty07ptn24escv5j45qv053mdkuwun9w4xrk3ekyjfyet3qw6dnkq Picturavis Hooded crow This hooded crow was walking along the beach looking for breakfast. It completely ignored me, allowing me to get close. Corvus cornix | Hooded crow | Nebelkrähe Nikon D500, Sigma 150-600mm C, 600 mm, f6.3, 1/500, ISO 800, handheld #bird #beach #photography #denmark #digikam #darktable https://pixelfed.de/storage/m/_v2/1483/0e43b1202-69768b/Ht3601fI1G9P/r8m9Jtj05kkUU7ODlc25r6IZYcdwdukM7Fn11GKT.jpg