{"id":13086,"date":"2026-01-16T18:22:10","date_gmt":"2026-01-16T17:22:10","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?p=13086"},"modified":"2026-01-16T21:10:15","modified_gmt":"2026-01-16T20:10:15","slug":"la-rosette-en-sho-lien-pour-telecharger-les-brutes","status":"publish","type":"post","link":"https:\/\/deep-space-astronomy.ch\/en\/la-rosette-en-sho-lien-pour-telecharger-les-brutes\/","title":{"rendered":"La Rosette in SHO (link to download roughs)"},"content":{"rendered":"<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">First light: La Rosette in SHO from my rooftop in the middle of the city<\/h3>\n\n\n\n<p>That's it, my first image is out! \ud83c\udf89<\/p>\n\n\n\n<p>Those of you who follow me will know that I was setting up a new setup with a rather crazy brief: to shoot deep sky (and especially extended nebulae) from the sloping roof of my building, right in the center of town. The constraints were heavy: light pollution, difficult access, cables to manage... I needed something reliable and optimized.<\/p>\n\n\n\n<p>Here is the result of this baptism of fire on the <strong>Rosette nebula<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Le Matos: Why these choices?<\/h4>\n\n\n\n<p>The idea was to maximize the signal while minimizing the hassle. Here's the titular team:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-768x1024.jpg\" alt=\"\" class=\"wp-image-13087\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-768x1024.jpg 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-225x300.jpg 225w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-1152x1536.jpg 1152w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-1536x2048.jpg 1536w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-9x12.jpg 9w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-600x800.jpg 600w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/IMG_7180-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optics :<\/strong> SQA85 (the sharpness is there).<\/li>\n\n\n\n<li><strong>Camera :<\/strong> ToupTek SkyEye62AM (the famous IMX455 sensor, a monster).<\/li>\n\n\n\n<li><strong>Frame :<\/strong> Avalon M-Zero.<\/li>\n<\/ul>\n\n\n\n<p>I'll stop for two seconds on the Avalon. It's the real game changer of this configuration. Why is that? No meridian reversal.<\/p>\n\n\n\n<p>In astrophotography, one less hassle is a victory. When you're shooting from a rooftop in fickle weather, not having to keep an eye on the meridian flip or cable management at 2am changes your life. You sleep better, and the bullies pile in.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Target and acquisition: \u00abBourrin Mode\u00bb activated<\/h4>\n\n\n\n<p>To test the beast, I took the classic Rosette. I wanted a well-known reference to judge signal quality.<\/p>\n\n\n\n<p>I launched the acquisitions without thinking too much, in \u00abphoton vacuum cleaner\u00bb mode as soon as there was a hole in the clouds. Inevitably, I had a lot of garbage to throw away, but in the end, I came out with my personal integration record: <strong>25 hours laying time.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>H\u03b1 :<\/strong> 35 x 600s<\/li>\n\n\n\n<li><strong>OIII :<\/strong> 50 x 600s<\/li>\n\n\n\n<li><strong>SII :<\/strong> 64 x 600s<\/li>\n\n\n\n<li><em>(2.5nm filters)<\/em><\/li>\n<\/ul>\n\n\n\n<p>The verdict on the signal?<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"819\" height=\"1024\" data-id=\"13089\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-819x1024.png\" alt=\"\" class=\"wp-image-13089\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-819x1024.png 819w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-240x300.png 240w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-768x960.png 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-1229x1536.png 1229w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-1639x2048.png 1639w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-10x12.png 10w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-600x750.png 600w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/SII_insta-copy-scaled.png 2048w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"819\" height=\"1024\" data-id=\"13090\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-819x1024.png\" alt=\"\" class=\"wp-image-13090\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-819x1024.png 819w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-240x300.png 240w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-768x960.png 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-1229x1536.png 1229w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-1639x2048.png 1639w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-10x12.png 10w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-600x750.png 600w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/OIII_ADBE-copy-scaled.png 2048w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"677\" data-id=\"13091\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-1024x677.png\" alt=\"\" class=\"wp-image-13091\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-1024x677.png 1024w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-300x198.png 300w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-768x508.png 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-1536x1015.png 1536w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-2048x1354.png 2048w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-18x12.png 18w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/couche-ha_zoom1-1-600x397.png 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>In H\u03b1 (on the right), unsurprisingly, there's a lot going on. In OIII (middle), the heart is very rich. But the real slap in the face is SII (left). I wasn't expecting so many weak extensions from the city. This is where the processing challenge began: how to make this SII pop without massacring the image balance?<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">My Workflow:<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<p>1. Cleaning (Linear)<\/p>\n\n\n\n<p>WBPP to stack it all up. Automatic DBE (Seti Astro's script) layer by layer. It's crucial to fire the gradient before touching anything else.<\/p>\n\n\n\n<p>Then, the holy trinity in linear :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BlurXTerminator (for sharpening)<\/li>\n\n\n\n<li>NoiseXTerminator (ciao noise)<\/li>\n\n\n\n<li>StarXTerminator (we fire the stars)<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Note for later:<\/em> I'd like to test a slight rise with MAS <em>before<\/em> to remove the stars, it seems to help the algo on dense areas.<\/p>\n<\/blockquote>\n\n\n\n<p>2. Creating the HOO<\/p>\n\n\n\n<p>I mount the H\u03b1 and OIII histo with MAS (sky background around 0.2).<\/p>\n\n\n\n<p>Assembly via Perfect Palette Picker, then Narrowband Normalization in pure HOO mode (Blend Amount at 0).<\/p>\n\n\n\n<p>A little HDR and NoiseX to clean up the structures.<\/p>\n\n\n\n<p>3. The sinews of war: IBS<\/p>\n\n\n\n<p>This is where it all comes in. I treated the SII layer separately (BlurX\/NoiseX\/StarX). I stretched it with MAS, keeping the sky background very dark so as to retain only the details.<\/p>\n\n\n\n<p>Next, colors are blended with NB Colour Mapper (Hue 47, Saturation 0.75) and progressively merged into the HOO mix via ImageBlend.<\/p>\n\n\n\n<p>4. Finishing (Photoshop &amp; Pix)<\/p>\n\n\n\n<p>Photoshop to play with curves, micro-contrast and saturation. The aim is to respect the weak extensions without making it \u00abcartoony\u00bb.<\/p>\n\n\n\n<p>Back to Pix to reset the stars (NB to RGB Star Combination).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">The downside: Let's talk about the Tilt \ud83d\udcd0<\/h4>\n\n\n\n<p>Let's be honest: if you zoom in on the corners, you'll see that it pulls a little. There's some tilt.<\/p>\n\n\n\n<p>The SkyEye camera has an adjustment ring, but adjusting it by hand on a rooftop is hell. I'm seriously eyeing Wanderer Astro's Electronic Tilt Adjuster to automate this. If I fall for it, I'll let you know.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">The last word<\/h4>\n\n\n\n<p>This image validates the concept of making <em>narrowband<\/em> from a city center, it's possible. The Avalon does the job in terms of stability, and the SII signal is an excellent surprise.<\/p>\n\n\n\n<p>If you want to have fun, <strong>I invite you to download my calibrated images<\/strong> (link below) and try your own treatment. It's always instructive to see how others interpret the same data.<\/p>\n\n\n\n<p>Happy skies to all! \u2728<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>The final image: <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"770\" src=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-1024x770.jpg\" alt=\"\" class=\"wp-image-13092\" srcset=\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-1024x770.jpg 1024w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-300x225.jpg 300w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-768x577.jpg 768w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-1536x1155.jpg 1536w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-2048x1539.jpg 2048w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-16x12.jpg 16w, https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2026\/01\/HOOS_v3_crop1-600x451.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Link to the full version: <a href=\"https:\/\/app.astrobin.com\/u\/Alien?i=7zalzq#fullscreen\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/app.astrobin.com\/u\/Alien?i=7zalzq#fullscreen<\/a><\/p>\n\n\n\n<p>Link for S,H,O layers so you can have fun with it. <\/p>\n\n\n\n<p>The only condition for using these images is to quote me \ud83d\ude42 <\/p>\n\n\n\n<p>Mind you, these are 60MP images, so almost 1GB for 3 master lights. <\/p>\n\n\n\n<p><a href=\"https:\/\/drive.google.com\/drive\/folders\/1bur5kYkU62cR-QKirHfq3jvP3Fp5Zl9x?usp=drive_link\" target=\"_blank\" rel=\"noopener\">https:\/\/drive.google.com\/drive\/folders\/1bur5kYkU62cR-QKirHfq3jvP3Fp5Zl9x?usp=drive_link<\/a><\/p>\n\n\n\n<p>See you soon! <\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Premi\u00e8re lumi\u00e8re : La Rosette en SHO depuis mon toit en pleine ville \u00c7a y est, ma premi\u00e8re image est sortie ! \ud83c\udf89 Ceux qui me suivent savent que je montais un nouveau setup avec un cahier des charges un peu fou : faire du ciel profond (et surtout des n\u00e9buleuses \u00e9tendues) depuis le toit [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":13092,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[862],"tags":[861,860,859],"class_list":["post-13086","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astrophoto","tag-astrophoto","tag-rosette","tag-sho"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/posts\/13086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=13086"}],"version-history":[{"count":4,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/posts\/13086\/revisions"}],"predecessor-version":[{"id":13098,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/posts\/13086\/revisions\/13098"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/13092"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=13086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/categories?post=13086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/tags?post=13086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}