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  1. Past hour
  2. on the trial version of pixinsight. still deciding if im gonna buy it. also use DSS for stacking.
  3. I think Mark was observing in his garden but the galaxy was almost overhead and he does know his galaxies, does Mark
  4. With the ASI1600MM, I think not having a luminance filter would have caused an issue as there would be no IR and UV filtering. Also if the scope can't cope with 36mm filters on a 4/3rds sensor, then it's not really fit for purpose. Exposures were 60 seconds, but the guiding was excellent, in fact I don't think I've ever seen the mount so happy. Probably due to it having such a light payload.
  5. Great report Ed and congrats on getting Zeta Herc ! I've had a mild obsession with that binary star for sometime now. I first managed the split with with a 150mm F/8 refractor, then eventually with my ED120 and now I've managed it with the Tak FC-100. It's a challenging pair alright with it's closeness and uneven brightness and a stern test of observer, conditions and equipment. I agree that it's when you are observing targets that push towards the limits that quality optics show their worth.
  6. What software do you use for stacking and analysis? I believe PI has some sort of statistics window - it should provide such information. I use ImageJ and it has Analyze feature that provides you with min, max, average, median, stddev and such.
  7. Excellent job. Looks really smart
  8. Thanks! I am fully on the pragmatist side!
  9. In my case I did as Peter did except that I added OIII to green and to blue since it lies on the border between the two. I make two images, one HaLRGB with OIII to green and another HaLRGB with OIII to blue. I paste one onto the other and adjust the opacity till the blend most closely matches the colour of the LRGB image. If the OIII contribution is excessive I paste it onto the HaLRGB and reduce its opacity. (I work that way round rather than adding the NB data iteratively.) For the core I will also have added Ha as luminance. I don't remember exactly how I did it but since the core is so well separated from the shell, and is circular, I'll have used layers and a well feathered eraser. A purist would make a layer mask but I'm more of a pragmatist! Olly
  10. Thanks all for taking a look at this. Looks like the scope has got to go back. The issues with this scope appear quite prevalent. When you couple this with the fact that the vixen dovetail is undersized and the focuser isn't all that great, it's not looking like a great product launch from WO. You would have though they would have learnt from their previous mistakes, as should have I. I feel sorry for the retailers in all this who'll have a lot of work on their hands dealing with all the returns and will probably end up absorbing some costs.
  11. All booked up too, very much looking forward to it this year. Also, let me throw my name (and Becks') in for any volunteering - especially dogsbody stuff. If you need clearing, tidying, help with the marquee, we're all over it. Cheers Will
  12. Thanks! That is what I also would try first if I have strong Ha and Oiii data (as often suggested by Olly).
  13. From the point of view of testing just the lens surely it would be better to use the simplest imaging train, no filters and no long exposures like 30 seconds should be adequate. Otherwise any number of the other extras could be adding issues to the image.
  14. Last night was clear in SE Essex, but I nearly didn’t go out, not long past full moon and the lingering twilight. However I’m so glad I did because it superb for double stars. The highlight for me was Zeta Herculis ( Struve 2084 ) the SW star in the keystone. I had two scopes in use, my OO 10” Dob designated 1/4 wave, and a new to me OO 8” VX8L, designated 1/10 wave. I’ve had many unsuccessful tries at splitting Zeta with the 10” and last night was no exception. Last night the seeing was so good that I tried magnifications that are usually pointless. With the 8” at 300x and then 400x I got a lovely clear pin point split. Bit of a challenge hand tracking at those mags with the 50 degree apparent field zoom, but definitely worth it I wont go into what 1/4 wave and 1/10 wave actually mean, different interpretations about that.......... Both scopes fully cooled and collimated, chuffed with the 8” previously owned by a local club member sadly no longer with us. Ed.
  15. thanks, where do you find the pixel values for an image?
  16. Göran, I always create an RGB image as normal and then add the Ha to red and OIII to blue in lighten mode
  17. Nice and people say Maks are only good for planets and lunar.... Alan
  18. Strange, there shouldn't be much difference between f1.8 and f2. OTOH I found the Fujinon fish-eye lens 1.4mm and f1.8 let in a lot more light than the 1.55mm f2 lens which is considerably smaller. I suspect focal ratios on fish-eye lenses mean something different from "normal" lenses and telescopes.
  19. Superb images both of them, and this is a question to both Peter and Olly: How did you mix in the NB data to the RGB? Just Ha to red and Oiii to blue? Or did you only use the RGB data for the stars? Göran
  20. Just as an example, I took this one three years ago from the car park at Westonbirt Arboretum, so also not far from Bristol. It was taken a few days before opposition, but even so, Saturn only reached a maximum elevation of just over 10 degrees. I imaged it a couple of hours before it reached it's maximum height, so it would have been below 10 degrees elevation at the time. SW200p with the ASI120mc camera and captured a couple of thousand frames, stacking only around 20% of the best. The division can be seen so I was very happy with it considering the low elevation. John
  21. When you power up the mount are any of the buttons on the handset lit or flashing ?
  22. Can't advise on a CMOS camera settings or length of exposures. But basically you will want for broadband targets to use LRGB. Luminance will be the most important filter for detail as it is the most sensitive. RGB is simply used for colour. I always do much more and longer exposures for Luminance. If you are doing Narrowband, you will need Ha, Oiii and Sii (some people also use Nitrogen but I have never used one of these). In the case of narrowband it does tend to depend on the target as generally the most detail comes from the Ha so here again I do the longest and most exposures. In NB you can combine the filter in a variety of ways. 1. Hydrogen (as Red), Oxygen (as green), Sulphur (as Blue) HOS 2. Hubble palette Sulphur (as Red), Hydrogen (as green), Oxygen (as Blue) SHO 3. there are some targets with very little Sii so you can do bicolour HOO, and some targets with very little Oiii, so you can do HSS. Additionally some LRGB target will benefit from extra Ha, but maybe get to grips with the basics first. You will need software which will register the various stacked filters so they will exactly fit each other (I think that was my biggest obstacle when i first started Mono imaging). I believe Pixinsight, APP, Registar and Maxim all do this. I have made a few videos on You tube on combining filters: Adding Luminance to RGB HTH Carole
  23. thanks just wondered if the hitec also gave lower readings when it was still lightish,to some extent like the sqm's
  24. Nice report, John. I haven't had another chance to spot the SN. It should still be in range of the C8 (it is reported as 13.6 on the Rochester site), but will require averted vision to get it. I also have the Delos 14mm (used it to nab this SN) and it is an awesome EP.
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