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Everything posted by Laurin Dave
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Very nice, great detail in the core and you have one of the vertical Ha jets starting to show Dave
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Here are three images of old favourites M81 M82 and surrounding area at different scales put together out of data collected over the last 5 years from Esprit150SX46LRGBHa (20hrs), Esprit100ASI1600 RGB and Ha (20hrs), GT71QHY600 Lum (6hrs), GT71ASI2600mc RGB (6hrs) Samyang135ASI2600mc RGB (13hrs) and Askar200QHY600 Lum (12hrs) all from my Bortle4/5 backyard observatory. Processed in Pixinsight and Photoshop. Thanks for looking Dave
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Very nice Steve... swimming the wrong way though .. as Francis says it does look a bit magenta.. sometrimes this can be caused by running scnr or equivalent prior to colour noise reduction Dave
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Mesu mount (all versions) owner's thread
Laurin Dave replied to Jonk's topic in Discussions - Mounts
Start by reading the guide... Dave -
Mesu mount (all versions) owner's thread
Laurin Dave replied to Jonk's topic in Discussions - Mounts
These documents will help... I use mine through SGPro but also have NINA and I'm pretty sure it'll just be the same ie connect to the mount via Sitech .. same with Cde C , once Sitech installed CdeC will see it as an available mount driverMesu_200 Guide.pdfSitech OperationsManual1-1.pdfSitech SetupManual1-1-a.pdf -
Filters - advice please.
Laurin Dave replied to Skipper Billy's topic in Discussions - Scopes / Whole setups
Interesting, the Astronomy Tools calculator puts these as emanating about 4mm from the sensor... -
Fabulous image of what must be a very tough target from your location.. well done Dave
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Filters - advice please.
Laurin Dave replied to Skipper Billy's topic in Discussions - Scopes / Whole setups
Hi David.. a couple of thoughts... I'd suggest you try the Blue filter with a different camera eg your lodestar and see if the halos are still present, also have you used the calculator on astronomy.tools to check where they are coming from.. When I got my SX46 (also KAF16200) it had horrible halos and microlensing like an ASI1600 ... SX had put the sensor window in the wrong way around, easily fixed and lucky for me they are only just down the road. If it is the Blue filter I'd have thought that Baader could supply a replacement, even if you have to pay for it it'll be a lot cheaper than a new set. As for the Oiii ... the Antlias get good reviews and from what I've seen good results. Dave -
Hyades, Pleiades, California and IC348
Laurin Dave replied to ollypenrice's topic in Imaging - Deep Sky
Very nice Olly, along with Chris I hadn't realised there was Ha to the west of IC348, so something to go after next season .. What was the issue with the larger mosaic? Gradients? Living in an area with many I've found that the following (rather laborious) method works better than any thing else I've tried ... Crop each panel to remove artefacts.. Run SXT .. run DBE on the starless image (use normalise image option) .. iterate to optimise location of DBE points.. subtract the optimised background from the original image using Pixelmath.. ($T-Background +0.005) (the pedestal ensures no zeros in the resulting image) .. colour calibrate ... save .. when all complete load into APP as TIFS (it'll throw a wobbly with FITS as it'll ask for all the original subs.. ). I've done this on an 18 panel mosaic.. ran SXT overnight then about 2 hours work.. I'd be happy to give it a go. Dave -
Thanks Olly, Francis and Chris.... the top bit reminds me a bit of this diagram.. ie Flemings right hand rule Dave
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Thanks all , much apprectiated Dave
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The Helping Hand dark nebula in Cassiopeia including LDN1357 (the hand) LDN1355 (the wrist) LDN1358 (the upper arm) and LBN643 (the reflection nebula to the left of the hand). 10hours of luminance through Esprit100QHY600 and 10 hrs of Colour through GT71ASI2600mc.. Processed in Pixinight and Photoshop.. many many times! Thanks for looking Dave
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SGL 2024 Challenge 1 - Narrowband
Laurin Dave replied to MartinB's topic in SGL Challenges and Competitions
Here's another.... NGC2174-261 The Monkey Head Nebula at the top of Orion's raised right arm presented using the Foraxx palette script from Pixinsight. 7.5 hours of Ha through Esprit150QHY600m, 4.5hours Oiii and 3.5 hours Sii through Esprit100ASI294mm captured last week under a nearly full moon. Processed in Pixinsight and Photoshop with full use made of Russ Croman's tools. Ha, Oiii ands Sii integration files registered, corrected using BXT in correct mode, stars removed using SXT, noise reduced using NXT, Stretched with Histogram and GHS, Ha, Oiii and Sii combined using Pixinsight Foraxx script, Stretched Ha applied as Luminance, a touch of LHE and MMT sharpening, Then into Photoshop for final noise reduction, colour enhancement using LABcol and Selective colour and addition of Ha stars in Screen mode. Dave- 81 replies
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M78, Barnard's Loop and The Bogeyman
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thanks Steve Thanks Harry Thanks Alan Thanks Goran... I put it down to low noise sensors and Star Exterminator! Dave -
M78, Barnard's Loop and The Bogeyman
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thanks Carole -
M78, Barnard's Loop and The Bogeyman
Laurin Dave replied to Laurin Dave's topic in Imaging - Deep Sky
Thank you Chris, Kinch, Michael, Olly and Michael... much appreciated Dave -
M78, Barnard's Loop and the Bogeyman in Orion. A two panel mosaic of the Bogeyman, Barnard's Loop and M78 area of Orion. 4hrs Lum plus 2hrs Ha through Esprit100QHY600 and 6hrs RGB through GT71ASI2600mc per panel captured in mid December 2023. Processed in Pixinsight and Photoshop. Close up of M78 below. Thanks for looking Dave
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Heart nebula - Short mosaic experiment
Laurin Dave replied to ONIKKINEN's topic in Imaging - Deep Sky
Very nice... and well done. I did a 4 panel Heart Mosaic a while back that was impossible to stitch together until Photometric Mosaic came along.. It is also very well worthwhile running the subs for each of the panels through Normalise Scale Gradient prior to integration.. This uses the same Photometric technique to normalise each of the subs to the best one thereby minimising gradients in each panel giving Photometric Mosaic the best start. Good luck with your project Dave