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  1. Past hour
  2. I decided not to waste the clear skies even if the full moon was up so I spent 3h shooting M3. 1.5h of lum through the IDAS LP filter and 0.5h each RGB, all through the 200p F/6 newtonian. As for M13, that's another story. I started strong a while ago and shot some red and infrared with the 150PDS then moved to the larger 200p. With this one I shot about 12h of luminance and some 6h of G and B. All combined then on top (or below) I added the data I had from last year, another 20h, shot with the 130PDS, but tracked with the AZ-EQ5. The old data contributed maybe 20% to the final image. Here they are. Please click to go to astrobin and see them at full resolution. M13 is more worthy, Thanks for watching and clear skies! Alex
  3. I am still keen to buy this - please could you message me if still available Andy
  4. Thanks Olly, I was using about 1.5 secs almost all the time, the wind messed things up alot, I also run the guide assistant and though I didn't understand most of it it did tell me PA was out by 6.3mins, also gave me some settings but cloud came a stopped everything. It did tell me to use between 1 and 3 secs. Alan
  5. I normally blend at around 50% in layers in the red channel. Then re-combine the channels. Or blend at 100% and blend mode lighten in the red channel. I normally experiment to see which has the best effect. Carole
  6. Not sure I would need to look again, it was the lowest number, the other was higher, but the wind when it blew messed things up alot. I was guiding almost overhead but when it was still results look decent. Alan
  7. Hi When adding Ha data to the Red Channel in Photo-shop, should i be changing the blending mode,or leave it at normal? Appreciate any help. Mick.
  8. Here you go. This thread in mobile format, then I go to the three dots at the top left of the screen and select Desktop mode and that's what you get. All the info but very small. Of course you can put the phone into landscape which helps or just zoom in a bit. EDIT added a pic showing the three dots!
  9. Yes, this is the key thing. Unless you have plugged in the pixel size of the guide cam and the FL of the guidescope, PHD will give you values in pixels. You need them in arcseconds, so give it that info if you haven't done so already. Then you compare the RMS in arcsecs with the image scale of your main scope-camera and aim to get the guide RMS to be no more than half the image scale. It must be said that an EQ5 or EQ6 getting down to 0.5" RMS is doing well. I wouldn't worry about trying different exposure times on the guider. This is robust. Don't be fooled by the nice guide trace you get from ultra short exposures, though. PHD cannot know where the guide star really is, it can only know where the atmosphere has placed the star's image on the chip. If the seeing is moving the star around a lot the mount will simply chase its image round the chip, a process called 'chasing the seeing.' My EQ sixes seem to like about a second but this will vary with guidescope and camera. (Longer exposures allow the changes in stellar image position to average out somewhat.) I would highly recommend the Guiding Assistant in PHD. I think it's in the Tools. Just run it for a nice long time - five minutes, say - and then apply its recommendations. Great that you're in business! Olly
  10. Content deleted.. dual post .... my error
  11. A nice M51. I like the detail you've got in the satellite galaxy. I think there is much more detail in this data set though and you need to tease it out. Not at all easy is it?!
  12. No I didn't. I haven't been able to get this to work since the first few successes when Mark first gave me the Photoshop method for doing it. Don't use Pixinsight. But have devised my own method in Photoshop. Carole
  13. Nice. Did you use arcsin stretch since the blue stars a bit of a tell tale sign.
  14. To the OP. I would rethink completely. A 200 Dob is where you should be thinking. Simple, easy, quite small. and you will learn the night sky Do your ground work with that and the progress to a 11" scope. Otherwise, a 11" SCT suddenly in your house/garage and you are going to think wow - it's a whopper. Trust us. We've been there and done that. A 200 Dob is a fantastic scope and in no way a "baby" scope. Telewxopes increase in size exponentially as the aperture increases. Also, large aperture magnifies the negative effects of the atmosphere as well. https://www.firstlightoptics.com/dobsonians/skywatcher-skyliner-200p-dobsonian.html
  15. With the vagaries of uk forecasting, I’d be prepared for anything!
  16. I think of it in fairly simple terms. Firstly you need to know your guide error in arcseconds rather than pixels so you give PHD your guidescope's focal length and your camera's pixel size and then it will give you the guide values in arcsecs. Then you need to know your image scale in arcseconds per pixel. As a rule of thumb your guide error should be no worse than half your image scale if guiding is not to affect final resolution. What tends to happen is that, if the seeing is bad, it will lower the resolution of both the guide camera and the imaging camera, causing the guiding to deteriorate as well. Since I can't do anything about this I just shoot colour on such nights! Olly
  17. Not imaged this one since 2012. But with being stuck at Home in Bortle 8 and clear skies on a Full Moon, I decided to give it a go. My first experiment with a Hutech Idas LPS P2 filter instead of a luminance filter from my Home Bortle 8 location. Taken one and two days past a full Moon as well, so I think a good test for this filter. Not sure what to call the Luminance component now 24 x 180 secs Idas filter as luminance Red 6 x 180 secs Green 5 x 180 secs Blue 5 x 180 secs Atik428EX and x0.8 FR Skywatcher ED120 HEQ5
  18. I used to live in Crickhowell and you could walk into the front garden, look up and see the Milky Way in all is glory. Having now left the army and bought my house in South Wales, this is what I have outside my door!
  19. Hi Alan are those rms numbers arcseconds or pixels.. if the former i’d leave we’ll alone as that’s good for an AZEQ-6. Dave
  20. Cheers mate. Lots to think about but the good thing is that I'm in no rush at the moment so will decide appropriately and maybe I might save up a bit each month for the difference on EC version so the spend doesn't sting as much That's a million dollar question. When I first got in to this hobby I thought I've got all what I'll ever need and 2 years down the line I'm now seeing the old me in the past and laughing my head off at his thinking. Boy was I so wrong! I've spent more than double that already One thing is for sure, I'll never be going down the Mesu route because I'll never be able to first justify the spend and secondly will never have the payload. If this new mount serves me well, I'm "hoping" I'll keep this for the next 10 years.
  21. Grant

    Save the Date

    Tickets will go on sale this Friday at Midday
  22. Today
  23. Hi, Sorry for the silly questions, is this based in Kent (just saw you are in Rochester Kent) and do you know what make the scope buggy is and weight this can carry? I am a stroke survivor, so at the end of the night moving a CPC925 back in the shed would save me a lot of time. (hence the question about weight) Regards Craig
  24. Hi, if you upload your pictures to http://nova.astrometry.net/ it will plate solve them for you and tell you what you're looking at.
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