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SiD the Turtle

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About SiD the Turtle

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  1. Thanks @rnobleeddy @rickwayne @MARS1960 for the input on this topic, lots of food for thought. I want to keep the DSLR for daytime photography too, so I think I'll continue to save towards a full mono setup rather than invest in a LP filter for now!
  2. Hi folks, After some advice on a light pollution filter. I'm in a Bortle 5 and I'm combining a William Optics ZS73 and a Canon 600D unmodified. This winter I've been focusing on the Andromeda galaxy, which I've gotten some decent subs on, but now we're getting to the point where it sets behind the trees too early to get more than a few images. So I'd like to attack 'beginner' nebula targets like Orion and other large-ish targets that suit my scope. Initial results are not super great, and I fear I have more of a problem with light pollution with nebulae than I did with the nice, brig
  3. Hi all, I've been trying to get decent flats and I think I'm failing. Basically my master flat doesn't really clean up the vignetting and dust motes. I've tried both a flat light source (laptop screen showing white, balanced over the lens) and the t-shirt method. The histogram is often off to the right, which doesn't seem to match most of the tutorials online. Setup: Canon 600D unmodified. William Optics ZS73. Controlled through EKOS/Astroberry. Taking FITS files. DSS for stacking, PixInsight for post-processing. Here's the raw, stacked pictures, 23 5 min
  4. Completely agree, it'll come down to your requirements and available cash at the end of the day. For me personally I find the semi-regular release of new RPIs and my love of tinkering means buying the top end model might not make sense as the next new model might have something I want that would replace it- for example USB 3, faster processor etc. So the most demanding requirement gets the new RPI, then the others get downgraded to less taxing duties. For example the RPI2 I started experimenting on with Astroberry is now a PiHole.
  5. Connection- are you thinking of running ethernet outside then? I would have thought that'd be a pain/another cable coming out of the house. Case- yep I'm using the FLIRC case that's been mentioned previously. It does get pretty warm in the standard case: https://thepihut.com/products/flirc-raspberry-pi-4-case. I've not worried about water ingress or anything like that as I'd like to think I'd run everything inside if the heavens started to open, but you can get rubber caps if you are worried. When I bought the Pi 4 the choice was between 2GB and 4GB, there was no 8GB model. I opted
  6. Just wanted to add my 2p- my setup is an RPI4 with Astroberry. I use PHD2 more than the internal guider just because it's more popular and easier to get support online for. If you haven't already, look into plate solving. It used to be very involved to set up but with the latest release it's all out of the box and indeed faster in my limited experience. Once set up it'll vastly reduce your setup time. On wifi my crappy router will barely go through a sheet of paper, let alone several walls, but I was lucky enough to have a shed with a power point in it. So I bought a cheapo T
  7. Hi all, I have a William Optics ZS73, which has their lovely carry handle which fits finder shoe type items. I have my Skywatcher EvoGuide ED50 attached to it, but this is the model before they started bundling it with a mini-dovetail, so it's attached via a finder shoe which introduces flexure and looks a bit janky. I also have a power box and Raspberry Pi I'd like to somehow bolt to the OTA to reduce cabling issues. So what's the name for a mini dovetail that would fit in such a finder shoe gap/do they exist at all? I'm thinking of getting a long dovetail to attach to it
  8. Hey all, just wanted to bump this and say thanks, it was a simple as the calibration needing to be reset. My guide graph is now a lot more healthy, with an overall RMS of 0.74' on both axes! Thanks to the weather I've only managed to get 10 subs so far, but the stars are round and Andromeda is surprisingly clear for my crappy suburban skies. Here's 10 subs stacked, stretched and de-greened. Looking forward to some clear skies to get a whole bunch more!
  9. Thanks all, I bet it's calibration- I'd completely forgotten about that and in the last month I did get a new scope (the William Optics) and haven't re-calibrated since, it's got to be that! Just got to wait for clear skies here again in SE England. Flexure is also probably an issue with the crappy mount that the ED50 has. The William Optics does have a kind of handle with a long saddle mount in it, I wonder if you get a compatible dovetail to replace it? I see if I were to buy the ED50 today it comes with one.
  10. Hey all, Looking for some help diagnosing this issue. Basically, my PHD2 guiding seems to be fine for a few minutes, then the guiding goes nuts in both axes and tries to do increasingly larger corrections. If I stop and restart guiding, again everything will continue fine for a few minutes before it happens again. The effect in my imaging is I get a few minutes of pin-sharp stars then a spiral around them. Here's the graph: Kit as follows: HEQ5-PRO + Rowan Belt Mod Skywatcher Evoguide 50ED guide scope ZWO ASI 120MC-S guide cam Polar alignment via PoleMas
  11. Thanks @vlaiv, given me some new concepts to read up on/Google, much appreciated.
  12. Hi folks, Got a new refractor on its way to me, but as a relative beginner I have no experience in knowing what I'm looking at in terms of it being correct on arrival. How do you test your new scopes for astrophotography in particular? Of course the answer is probably look down the scope/take pictures and see if the stars are round, are they clipped, any fringing or colour distortion etc. But are there any more scientific ways of testing? To spot things as a beginner I might not spot? I have seen some people post images that almost look like heatmaps or heightmaps, which of cour
  13. Hey guys, fantastic job so far, must be frustrating that there's so much demand and no stock! What are the chances of seeing a Williams Optics scope in this side of Christmas? Looking at the Zenithstar 73 or something similar, but it looks like I'm more likely to see stock of WO than SkyWatcher at the moment? Though I see at least one retailer is saying January for WO at this point!
  14. Looking for my next scope to start some proper deep sky imaging and after some advice. Current setup is: Celestron 127 MAK HEQ5 unmodded Skywatcher 50ED guidescope + ZWO ASI120MC-S guide cam. Canon 600D but looking to invest in a dedicated camera next year. Controlled via Astroberry/Raspberry Pi. As you can guess, the very high focal ratio was good as my beginner's scope but a) it takes some long, hard to track subs to get a decent picture and b) the reduced field of view means I can't image anything really beyond galaxies. So what's next? Budget is proba
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