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Rossco72

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  • Interests
    Astronomy.....
    Clay Target Shooting
    Model Railways
  • Location
    Glasgow

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  1. i use 2.8nm Antlia filters. Image processed in Pixinsight using Blur X and Noise X along the way.
  2. Friday night saw almost 3 hours of clear skies. The first 3 hour window this YEAR!!! for me. Spent an hour getting new mount aligned and guidescope focussed and finally got 2 hours imaging. So here it is, 2 hours with the 2600MM Pro across 2 channels. Obviously more integration would be great, maybe even some SII but I was surprised how reasonable this turned out for first light and only 2 hours total! Cheers for looking.
  3. To be fair I use the ASIAIR polar alignment to check I'm close enough to guide. Once I get a pier installed I might take the time to spend on the pole master to get it locked in as close as I can.
  4. Apologies for the rain and cloud folks, hopefully it will pass soon. I have recently acquired a ZWO AM5 mount to replace my workhorse NEQ6 Pro which done a sterling job for many years (I might still use it in a second setup at some point!). I attached the ZWO pier to my EQ6 legs as although the carbon fibre tripod from ZWO is great, it is very light and we get some very windy days here. I also added my pole master to the RA axis on the AM5. Rig now consists of: William Optics 50mm guidescope with ZWO helical focuser and ZWO ASI220MM guide Cam William Optics GT81 IV Scope ZWO ASI2600MM camera, EFW and EAF with Antlia 2.8nm Filters for Narrowband and LRGB Pro Astronomy. Protected under a Telegizmo 365 cover. If only we now had some clear nights!!!!
  5. Cuiv the Lazy Geek and Lukomatico are two of my favourites.
  6. at 150dpi it should be ok at a reasonable distance but you will see pixelation close up. at 300dpi it should look pretty smooth. At 600dpi it would be like HD on a telly. Some photo printers will do more than 1200dpi
  7. Thanks. i have that, this was my starting point but i am way over 70mm now
  8. Wouldn't you just take the resolution of your image in pixels and divide by the size you want out in inches and that's your number? The higher the better, although anything over 600 dpi will likely be lost on most printers.
  9. Nice image, I like the colour balance and neutral background you have achieved.
  10. @Stuart1971 I understand tilt may make it impossible to determine, but in your opinion do I still need to move the camera further back? The last set of images still appear to show stars radiating from centre.
  11. Radio Silence on this since April, wonder if there is a problem with it?
  12. Howdy wise and knowledgable imagers, I have never been entirely happy with my stars, they aren't awful but they also aren't very good. I have a William Optics GT81-IV telescope with a William Optics Flat 6A mk3 reducer/flattener. These are supposed to be able to produce a 44mm flat imaging circle. I use a ZWO ASI533MM Pro camera which only has a 24mm or so diagonal and so I was hoping for pretty much excellent stars and flatness across the entire image. took a series of shots and used ASTAP and Pixinsight to try and assess the quality of the stars, the eccentricity and FWHM etc. but I could do with some help understanding where I am going. Each shot is taken, assessed and then the adjustable field flattener rotated one turn of the very fine threads which is probably less than a mm. However I am now considerable further away than the recommended 62.1mm for the GT81 telescope. Am I going too far or do I need to keep going further? Below are the series of FIT images followed by the ASTAP analysis images and then the Pixinsight analysis images. Each set is 1 turn of the reducer further away than the set before. 1_30.0s_Bin1_L_20230514-225148.fit 2_30.0s_Bin1_L_20230514-231103.fit 3_30.0s_Bin1_L_20230514-232039.fit 4_30.0s_Bin1_L_20230514-233632.fit 6_120.0s_Bin1_H_20230515-225159.fit 7_30.0s_Bin1_L_20230515-230931.fit 8_120.0s_Bin1_H_20230515-225817.fit 9_30.0s_Bin1_L_20230515-232831.fit Anyway, apologies for the long post, but I would appreciate input from anyone with experience in setting the correct offset and whether I should continue to move further away to dial this in. Cheers 5_30.0s_Bin1_H_20230515-224627.fit
  13. Finally finished the 8 panels of Ha on this target. I have 3 OIII and 2 SII so long way to go yet and I will be doing RGB for the stars eventually. This is a total of 44.75 hours just on the Ha.... Can't wait to add the other channels.
  14. You could try colour masks and also when you do histogram changes, hold the bottom left down to keep the background from brightening.
  15. I haven't done any real processing on this yet, just ran BlurX, stretched and NoiseX for sake of putting this up, will process fully once I have the other channels and panes completed. (If we ever get clear skies again!). This is around 24hours of capture just for these 4 panes and probably would benefit from even more...
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