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Everything posted by Laurin Dave
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Just seen it.. well done Carole! Dave
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Astro Essentials Samyang Lens to M48 Adapter
Laurin Dave replied to FLO's topic in Sponsor Announcements and Offers
That is what I wrongly assumed.. Nikon fit lens has 4 screws for a start -
Astro Essentials Samyang Lens to M48 Adapter
Laurin Dave replied to FLO's topic in Sponsor Announcements and Offers
Excellent.. but probably worth pointing out that this looks like it will only fit the Canon version of the lens. I got a similar one from Astrojolo and it doesn't fit my Nikon version. Dave -
NGC1579 The Northern Trifid - RGB in full monlight
Laurin Dave replied to gorann's topic in Imaging - Deep Sky
Welcome back Goran! Very nice object which I shall add to my to do list and impressive for OSC under a 95% Moon, what did the Ha look like and did you add it in? Dave -
Straton success.
Laurin Dave replied to ollypenrice's topic in Imaging - Image Processing, Help and Techniques
I believe that it works on newer Macs, there's certainly a Mac file to download which I tried without success on my 2013 IMac . and seem to remember reading somewhere that there are PS and standalone versions -
Straton success.
Laurin Dave replied to ollypenrice's topic in Imaging - Image Processing, Help and Techniques
Hi Olly If I remember correctly I downloaded it from Sourceforge.. unzipped it then copied all to the Program files/pixinsight/bin folder.. then opened Pixinsight.. opened the Process menu.. at the bottom of which is "Modules" click on that to open "Install Modules" search the "bin" folder for Starnet and install.. I did find out how to do this from a video somewhere but it was months ago now and no longer in my (or my pcs) memory .. HTH Dave -
The “two” andromeda galaxies?
Laurin Dave replied to willcastle's topic in Getting Started With Imaging
Just watched that video, very informative.. so thanks Wim -
The “two” andromeda galaxies?
Laurin Dave replied to willcastle's topic in Getting Started With Imaging
I can vouch for that.. looks like you've just popped off to the kitchen though! -
Dual Setup Suggestions
Laurin Dave replied to Singlin's topic in Discussions - Scopes / Whole setups
I'd have thought that so long as the piggybacked stuff doesn't cause any distortion (cant think why it would ) of your RC and mess its images up then it'll be ok. Not sure they'd work at the same time though (flex) so you'd want a separate guidescope for the refractor, plenty of images of folks with setups like this out there. -
The “two” andromeda galaxies?
Laurin Dave replied to willcastle's topic in Getting Started With Imaging
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The “two” andromeda galaxies?
Laurin Dave replied to willcastle's topic in Getting Started With Imaging
More like Detention! Barry Wilson has a useful tutorial on "Boosting Star Colour" on his SmugMug site which is worth a look -
Family and friends encouraged me to take a look at the penumbral eclipse last night, and I'm glad they did. RGB through Esprit100 and ASI1600mm and high cloud.. Had to wait for it to rise above the trees and rooftops. I've also included a diagram showing the positions of the penumbra and umbra at that time.. AS!3, Registax and Photoshop. Dave
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The “two” andromeda galaxies?
Laurin Dave replied to willcastle's topic in Getting Started With Imaging
Vlaiv, Olly I don't know for sure but isn't part of what Vlaiv is describing similar (or has the same effect as) ArcsinhStretch in Pixinsight., ie preserves colour ratio as you stretch Dave -
Dual Setup Suggestions
Laurin Dave replied to Singlin's topic in Discussions - Scopes / Whole setups
Piggy backed will be much easier to balance than side by side with such different scopes.. The Esprit100 is pretty good too, 550mm fl, with the flattener it covers APS-H which is a bit smaller then full frame.... what camera are you thinking of using ? Olly.. do you have a source for used FSQ106Ns.. other than your linen cupboard! Dave -
Can I suggest leaving the Moravian on the guided scope.. it'll be much easier to align... you'll be able to go deep with long subs... your stars will be lovely with those little spikes on bright stars from the KAF sensor.....you'll get a much wider field mono image as well.. and at 1" pp you'll be at or below the seeing limit anyway, binning the ASI178 2x2 will give the same resolution.. Plate solve and frame on the 178 equipped scope through a second instance of SGPro Dave
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So I understand.. although the latest I read (admittedly a few months back) was that it wasn't high on their priority. As I run very different exposure lengths on the two scopes I'm not sure that for my setup it would make much difference in terms of improving capture efficiency, with more equal length exposures it clearly will.
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Another excellent image to add to your amazing catalogue of planetary nebula Peter.. Dave
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Yes that’s one of the dual scope problems with an OAG.. another is drift whilst the primary does autofocus.. (if of course you do it 😉) .. although this isn’t much of an issue with the Mesu.. and another I have as I’m using SGPro is the inability to sync the exposures for dither, in total I lose about 1 in 6 of the secondary scope subs.. (it runs 2 min or 5 min subs the ccd runs 10 or 20 min subs.. I dither every second exposure on the ccd.. ).. I’m also pretty sure that the relatively short exposures on the CMOS camera help mask any flex .. so maybe Tomato that’s something else to examine ie whether for Galaxy season 10 or 20 minute lum on the primary and 1 or 2 minute RGB on the slave through a cmos camera (I seem to think you have one) would work .. Dave
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I agree Olly.. guide scope alignment would presumably minimise any field rotation (which would be the same if the scopes were aligned). I believe from the photos that Tomato is using an OAG so any focuser flex would only show on the slave. This is what I figured out was happening when I initially went to dual scope (Esprit150 with piggybacked GTF81 then Esprit100) .. the rather expensive remedy was a Feathertouch to take the 3 plus kg weight of the SX camera/filterwheel/OAG/Guidecamera/flattener on the 150.. the Esprit 100 focuser is fine with the much lighter ASI1600/EFW (the GTF81 focuser was a bit saggy). Dave
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Based on my Esprit150 I’d suggest that you also check your focusers for sag/flex, either or both could also cause eggy stars Dave
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Nice image.. that’s Messier 31 the Andromeda Galaxy Dave
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Hi Nigella.. just finishing one off myself.. it looks remarkably like yours! I use the AllSkyeEye software, works really well and has loads of features. I’m using the ZWO lens that came with the camera at the moment, seems ok for now but will be interested to see what lens recommendations are made. I’ve put a heater in mine, dewed up quite quickly without, I had an unused ZWO Dew heater and it works a treat. Dave
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Hi Andy I don't know but that ADU looks right.. As do the images you've posted the questions I'd ask are does the master flat you create from them work? ie does it flatten a flat? and how are you calibrating the flats? I'd use a matched master flatdark for cmos. Also if you're not doing it already I'd use dithering as this will help to remove any remaining fixed pattern noise. … Dave
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Whats going on with my Jellyfish..Help!
Laurin Dave replied to Craig123's topic in Getting Started With Imaging
Excellent Craig, pleased that you have it sorted out Dave