About

Welcome to my site dedicated to astrophotography.

This site is a feedback based on techniques used with my own equipment and borrowed to most other experienced amateur astronomers. It largely presents my photos of deep sky, planets and sky with the description of the different techniques used to achieve them and the associated equipment.

Like many of you, astronomy passionate me since my childhood. The day I had the chance to observe the night sky without light pollution at the time (in Aveyron state), such was my surprise to see so many stars and our beautiful Milky Way. The show of eclipses of the Sun and Moon with the visit of the magnificent Hall Bop comet in 1997 amplified this budding passion. Then came the experience of my first observation : after having collimated the small telescope that my son had for Christmas, I proceeded to the observation test that left me a vivid memory. I then had the chance to do a course in astronomy in 2006 at the famous "Ferme des étoiles" in the Gers state which is sponsored by Hubert Reeves. It was decided, the purchase of a mount and a telescope was a matter of months ! Then, the period of visual observation has quickly given way to astrophotography because I wanted to keep track of what I saw and, moreover, in color. It is at this point that complications began ...

I live 10 km west of Toulouse and so it's my default observation site.Despite conditions of high light pollution, it is possible to obtain correct images of lower bright objects like galaxies (8 of limiting magnitude approximately) using filters "pollution" and narrow bands. Since 2015, my town and other nearby ones switch off their public lighting from 1.00 am to 5.30 am which improves the quality of shots. I started astrophotography in 2012 but seriously since 2014 where I am learning and testing other amateur astronomers' techniques (especially in image processing) in order to improve.

Feel free to email me for any comments or questions about the different topics covered on this site.

Good visit !




Recent Work




The different "faces" of the Lagoon and Trifid nebulae (L-RGB, Ha-RGB et Ha-SHO)

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L-RGB : 44mn exposure time at 800 iso

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filter : CLS-CCD

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom

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Ha-RGB : 3h08mn exposure time at 800 iso

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filters : 24 x 360s with H-Alpha 12 nm and 11 x 240s with CLS-CCD

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom

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Ha-SHO : 4h42mn exposure time at 800 iso

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filters : 24 x 360s with H-alpha 12 nm; 18 x 360s with OIII 12 nm; 5 x 360s with SII 12 nm

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom




The Milky Way seen from the Northern Hemisphere: Horizontal Mosaic and Shooting from the Horizon

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The Milky Way: 2 pictures mosaic

2 x 30mn exposure time at 800 iso

EOS 450D filter removed + Obj Samyang 14mm f2.8 on Sirius EQ-G mount

CLS-CCD filter

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom

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Milky Way taken from the horizon

30mn exposure time at 800 iso

EOS 450D filter removed + Obj Samyang 14mm f2.8 on Sirius EQ-G mount

CLS-CCD filter

Preprocessing with IRIS (Christian Buil software)

Separate treatment beetween Milky Way and landscape with Photoshop - Final touch with Lightroom




The Triangulum Galaxy taken with a Newton telescope: need to put a coma corrector to correct the deformation of the stars near the edge of the field due to the primary parabolic mirror

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The Triangulum Galaxy - M33 (L-RGB)

1h15 exposure time at 800 iso (Tournefeuille, France)

Newton telescop 200/1000 on Sirius EQ-G mount / EOS 450D filter removed

CLS-CCD filter - Coma corrector

Prétraitement avec IRIS (Logiciel de Christian Buil)

Traitement avec Photoshop - Post-traitement avec Lightroom

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Superimposition of 2 images of M33 with and without coma corrector: uncorrected stars near the edge of the field are elongated while corrected ones remain round

Newton telescop 200/1000 on Sirius EQ-G mount / EOS 450D filter removed

CLS-CCD filter - with/without Coma corrector (Test with model Baader Planetarium MPCC Mark III)

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom



Work history




Difference between an "Ha-SHO" and "Ha-RGB" image of the America Nebula

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Hubble false-color image (Ha-SHO) of the America Nebula - NGC 7000

5h exposure time at 800 iso (Tournefeuille, France)

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filters : Ha : 18x7mn; OIII : 13x7mn; SII : 12x7mn

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom

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True Color Image (Ha-RGB) of the America Nebula - NGC 7000

4h exposure time at 800 iso (Tournefeuille, France)

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filter : Ha : 18x7mn; CLS : 22x5mn

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom




The America nebula decomposed into 3 spectral bands: H-Alpha (656 nm), OIII (501 nm) and SII (672 nm) It is these 3 filters which make it possible to create an image in "Hubble" false colors or "SHO"

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H-Alpha : Pretreatment (logiciel IRIS)

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filter H-Alpha 12 nm

18 snapshots at 7 mn of exposure at 800 iso

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OIII : Pretreatment (logiciel IRIS)

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filter OIII 12 nm

13 snapshots at 7 mn of exposure at 800 iso

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H-Alpha : Pretreatment (logiciel IRIS)

600/80 mm refractor on Sirius EQ-G mount / EOS 450D filter removed

Filter SII 12 nm

12 snapshots at 7 mn of exposure at 800 iso




The image processing procedures are available in the "Technique" section : The pretreatment procedure et The image processing procedures

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Stretching step : sampling points, clipping layers (curves and levels), filters and fusion masks, scripts, histogram, ...

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The synthetic luminance used for the "L-RGB" step




The power of image processing : exemple with the Helix nebula that shows the difference between raw snapshot and the processed image

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RAW snapshot of Helix Nebula - NGC 7293 (09/2015)

RAW snapshot at 4’ exposure time / 800 iso

Newton telescop 200/1000 on Sirius EQ-G mount – 450D EOS filter removed

CLS filter (due to light pollution conditions)

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The Helix Nebula (L-RGB with synthetic luminance) - NGC 7293 (09/2015)

1h48 exposure time at 800 iso (Tournefeuille, France)

Newton telescop 200/1000 on Sirius EQ-G mount – 450D EOS filter removed

CLS filter (due to light pollution conditions)

Preprocessing with IRIS (Christian Buil software)

Image processing with Photoshop - Final touch with Lightroom



The different faces of Mars

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Mars (04/2014)

Color camera TIS DFK 41 - Barlow lens 5x

200/1000 Newton on Sirius EQ-G mount

270 best snapshots stacked of 9000

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Mars (04/2012) - LRGB composite

B & W camera PLB-Mx - Barlow lens 5x - LRGB filters

200/1000 Newton on Sirius EQ-G mount




Evolution of the Saturn' rings inclination linked to the heliocentric position of the Earth from the planet: it takes 15 years approximately to see a complete tilting between the 2 hemispheres.

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Saturne (09/04/2010)

Color camera TIS DFK 41 - Barlow lens 5x

200/1000 Newton on Sirius EQ-G mount

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Saturne (23/04/2013)

B & W camera PLB-Mx - Barlow lens 5x

200/1000 Newton on Sirius EQ-G mount




Jupiter in the company of the moon Ganymede and speed of rotation over 2h30 time laps video (Very fast rotation of the planet in 9h55mn )

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Time laps video showing the Jupiter planet rotation (April 2015)

2:30 h time laps rotation

Color camera TIS DFK 41 - Barlow lens 5x

200/1000 Newton on Sirius EQ-G mount

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Jupiter with Ganymed moon (Nov 2014)

270 best snapshots stacked of 2700

Color camera TIS DFK 41 - Barlow lens 5x

200/1000 Newton on Sirius EQ-G mount




Full colored moon and lunar crater

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Full colored moon (May 2011)

Color camera TIS DFK 41 - Barlow lens 2x

200/1000 Newton on Sirius EQ-G mount

6 pictures mosaique - 6 x 150 best snapshots stacked of 3000

Pre-processed in AutoStakkert! - Processed in Photoshop and LightRoom

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Tycho lunar crater (Nov 2014)

Camera PLB-Mx - Barlow lens 3x

200/1000 Newton on Sirius EQ-G mount

350 best snapshots stacked of 7000




Shooting star in the Milky Way and super solar task

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Shooting star in the Milky Way

EOS 450D - Obj Samyang 14mm f2.8 - CLS filter on tripod

800 iso / 90 s exposure time

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Super solar task (Oct 2014)

PLB-Mx camera on a 600/80 mm refractor with a solar filter

1000 best snapshots stacked of 10000




2 videos "time laps": super moon eclipse 2015 and effect of Earth rotation on the stars

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Video "time laps" showing the evolution of the light of the super moon eclipse of 28/09/2015

EOS 450D filter removed + coma corrector

200/1000 Newton on Sirius EQ-G mount

73 snapshots at 400 iso / 1 s exposure time

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Video "time laps" showing the effect of Earth rotation on the stars

EOS 450D - Obj Samyang 14mm f2.8 - CLS filter on tripod

329 snapshots at 400 iso / 60 s exposure time




Usefulness of achieving flats just after snapshots : gradient of light intensity is more uniform in the picture and the dust has disappeared

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Preprocessing of the master flat from 12 flats made in the same conditions of focus and iso than object's snapshots (IRIS software)

Snapshot : 1/6 s exposure at 800 iso

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Preprocessing of 6 snapshots without flat with IRIS software

EOS 450D filter removed + CLS filter

600/80 mm refractor on Sirius EQ-G mount

Snapshot from Feb 5, 2016 - 5 mn exposure at 800 iso

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Preprocessing of 6 snapshots with flat with IRIS software

EOS 450D filter removed + CLS filter

600/80 mm refractor on Sirius EQ-G mount

Snapshot from Feb 5, 2016 - 5 mn exposure at 800 iso



Light pollution effect in astrophotography : the resulting gradient in the image is impossible to remove completely during treatment

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Significant light pollution effect (CLS filter used, urban agglomeration site)

Just after ignition of local public lighting (~ 5.30 am)

EOS 450D filter removed + CLS filter

600/80 mm refractor on Sirius EQ-G mount

Raw snapshot from Feb 5, 2016 - 5 mn exposure at 800 iso

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Moderate light pollution effect (CLS filter used, urban agglomeration site)

Just before ignition of local public lighting (~ 5.30 am)

EOS 450D filter removed + CLS filter

600/80 mm refractor on Sirius EQ-G mount

Raw snapshot taken Feb 5, 2016 - 5 mn exposure at 800 iso



Supermoon Lunar Eclipse from 28/09/2015

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Supermoon Lunar Eclipse 2015 - Mosaic

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Supermoon Lunar Eclipse 2015 (Untreated colors)

EOS 450D filter removed + coma corrector

200/1000 Newton on Sirius EQ-G mount

Snapshot of Sept 28, 2015 - 1 s exposure at 400 iso

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Supermoon Lunar Eclipse 2015 (Untreated colors)

EOS 450D filter removed + coma corrector

200/1000 Newton on Sirius EQ-G mount

Snapshot of Sept 28, 2015 - 1 s exposure at 400 iso



Update history


01/22/19 : Addition of the Lagoon and Trifid nebulae photos (L-RGB, Ha-RGB et Ha-SHO) in the Gallery ("Deep sky" section)

                 Update of the "Materials" section

                 Update of the "Links" section

11/18/18 : Addition of Milky Way photos in the Gallery ("Sky" section)

11/02/18 : Addition of the Triangulum Galaxy with effect of the coma corrector in the Gallery ("Deep sky" section)

05/22/18 : Addition of "America nebula" photos split into 3 spectral bands (Ha, OIII and SII)

03/25/18 : Addition of "America nebula" photos (Ha-SHO and Ha-RGB) in the Gallery ("Deep sky" section)

12/11/17 : Addition of image processing procedures in the "Techniques" section

10/22/17 : Addition of image preprocessing procedure in the "Techniques" section

06/25/17 : Addition of "Helix nebula" photo (L-RGB) in the Gallery ("Deep sky" section)

03/04/17 : Addition of Mars photos in the Gallery ("Planetary" section)

02/04/17 : Addition of Saturn photos in the Gallery ("Planetary" section)

02/03/17 : Addition of Jupiter photos in the Gallery ("Planetary" section)

01/24/17 : Addition of Moon photos in the Gallery ("Planetary" section)

01/07/17 : Addition of Solar tasks photos in the Gallery ("Planetary" section)

12/29/16 : Addition of photos and a "time lapse" video showing the effect of Earth rotation on the stars in the Gallery ("Sky" section)

                 Addition of a "time lapse" video showing the evolution of the light during the eclipse of super moon of 2015 in the Gallery ("Eclipses / Eclipse of super Moon 2015" section)

10/15/16 : Addition of a presentation on my astrophoto platform in the "Techniques" section

10/07/16 : Addition of a presentation on the observation in astronomy in the "Techniques" section

10/02/16 : Addition of a fun topic to identify constellations in the "Techniques" section

                 Addition of photos of the lunar eclipse of 2011, June in the Gallery ("Eclipses" section)

                 Addition of photos of the lunar eclipse of 2015, September in the Gallery ("Eclipses" section)

                 Automatic positioning of the language based on browser settings

08/11/16 : Addition of 3 photos showing the usefulness of achieving flats just after snapshots.

                 Addition of 2 photos in the "To process - Page 4" : The "Fireworks Galaxy with an open cluster" in CLS filter and the "Heart Nebula" in H-Alpha filter

                 Addition of an update history.

06/21/16 : An RSS feed has been set up to keep you informed of the latest updates. You can subscribe with your favorite software by clicking on the dedicated icon at bottom of this page.

06/19/16 : Opening of the website.

                 Addition of 3 photos of the super moon eclipse, one showing the total phase and an other showing a mosaic of several phases.

                 Addition of 2 photos showing well the effect of light pollution in astrophoto before and after the ignition of local public lighting with the same conditions shooting.



About this website

The aim of this website is to share photos, technics, materials with feedback from me and from others amateur astronomers.

Version 2.7


 

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