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pietervdv

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Everything posted by pietervdv

  1. Great image Peter! May I ask what exactly you did to finetune your mirrorcell? I am also a using a fast Newtonian, so I'm interested to know... I've also struggled with an annoying tilt in my ccd sensor. I have bought a Gerd Neumann detilter to fix the issue. Thanks, Pieter
  2. John, Very natural looking image! Impressive! Very refreshing to see a narrowband colour image not looking overpushed. Pieter
  3. Nice detail! Perhaps you could bring the brightness of M42 up a bit? The dynamic range is lost a bit, M42 should be much brighter as the outlining dust. But that's personal preference I guess. Pieter
  4. Last Friday I shot another 5 hour panel; so that concludes this project. Total exposure is 15 hours in 3 panels with above equipment. smal size: http://www.astronomie.be/pieter.vandevelde/deepsky/mosaic%20v3_med.jpg med size: http://www.astronomie.be/pieter.vandevelde/deepsky/mosaic%20v3_med.jpg Full size: 20 megapixel http://www.astronomie.be/pieter.vandevelde/deepsky/mosaic%20v3.jpg Thanks for checking & clear skies, Pieter
  5. Great start Peter. Goes to show that perseverance pays off in the end. What happened with the eq6 AZ GT? It could not be automated. PS: I am the belgian with the blocked carbrakes. Pieter
  6. Ok found it, looks very big too. If I didn't know any better, it looks just like an internal reflection from a bright star just outside of the frame. Thanks for pointing it out. Pieter
  7. Thanks, could you point out where this circulair feature is? I am curious to find out more. Pieyet
  8. Hello everyone, During 2 clear nights the last week of November I shot some data on the California Nebula. It came out as a 2 pane mosaic, each panel is exposed for 5 hours with 15 min sub exposures. The equipment was left running unattended with a scripted autofocus run every 0.5°C temp drop. Processing very minimal (20 min max): bad pixel map and stretched + contrast boost in PS, no noise reduction. Equipment details: Scope: Custom 10" f/3.8 Newtonian Astrograph Focuser: Custom 3" focuser with Rigel absolute motorfocus + beltdrive Mount: Mesu200 with SiTech controller Camera: sbig st8300 cooled to -30°C Filter: Astrodon h-alpha 5nm Guiding: Lodestar using a custom OAG Total exposure: 10 hours (20 x 15 min each panel) Med size version: http://www.astronomie.be/pieter.vandevelde/deepsky/ngc1499_2014_med.jpg Hi res version: http://www.astronomie.be/pieter.vandevelde/deepsky/ngc1499_2014.jpg Thanks for checking it out! All comments welcome. Clear skies, Pieter
  9. Looks like your focus is off. The flaring is also showing the primary mirror clips. Adding a baffle in front of the primary will sort this out. I also think your primary mirror is pinched or seriously out of collimation.
  10. Olly, Very deep and detailed in the faint areas! Well done! Perhaps you can increase the saturation in the yellow stars around the cluster? But it could be my monitor. Pieter
  11. I hate to ruin your day, but I assume this is the planetary you are refering to? I have discovered it on my Barnard 163 from last year and I thought I was the first aswell. The planetary nebula was discovered in 2009 during a sky survey. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=IPHASX+J214032.5%2B564752 http://www.astronomie.be/pieter.vandevelde/deepsky/barnard163PN.jpg Best regards, Pieter
  12. Very nice Sara!! As always, the mono H-alpha has my preference. I like the dark clouds in the left of your frame, it has gone right to the top of my bucket list! Do you know the designation of it? Pieter
  13. SGP: sequence generator pro. I fully agree, best money I have ever spent in imaging. Pieter
  14. Are you using long usb leads, or a usb hub with your Lodestar? If the supply voltage drops too far below 5V you can get weird readouts. I had exactly the same a couple of weeks ago and it was a faulty usb-hub. Regards, Pieter
  15. Great job Sara, lovely patch of the sky.
  16. Thanks for the kind comments! Diffraction spikes are an acquired taste I guess... Regards Pieter
  17. Hello SGL, Still digging through the backlog from my 2 week imaging trip to France (Lablaque / Varages) end August / begin September, I processed two more images. The images are made with a 10" f/3.8 Newtonian (custom built) and an sbig st-8300 CCD, the mounting was the rock solid Mesu200. All subframes 15 min, h-alpha using 20 min subframes. Captured with SGP, background corrected in PI and all further processing in PS. Together with M101 taken in February I imaged the most prominent 3 spirals in a single year with the same equipment / conditions & processing. M33: 17 hour exposure (including 4 hours h-alpha) Larger version: http://www.astronomie.be/pieter.vandevelde/deepsky/M33%202014%20med.jpg M31 South Western spiral: 10 hour exposure (including 3.5 hrs H-alpha) Larger version: http://www.astronomie.be/pieter.vandevelde/deepsky/m31.jpg And my M101 from earlier this year: a 23 hour deepfield exposure. Sorry for the repost on that last one here! Larger version: http://www.astronomie.be/pieter.vandevelde/deepsky/M101_2014_med.jpg Comments welcome, hope you like them... Regards, Pieter
  18. Great stuff! The final result with added Luminance will rival S. Guisard his mosaic! I wonder if the central black hole of our Galaxy is in this area, or would it be lower?
  19. Thanks Sara & Dave. Glad you like them! Regards, Pieter.
  20. Hello everyone, Today I processed two of my images from my last imaging trip in France (taken at Domaine de La Blaque), on my way home I stopped at Olly P. his place for 3 more nights. The weather during the 2 week trip was exquisite (12 clear nights in a row!), last part of the trip coincided with the moon's return. Luckily I still had these 2 on my bucket list for h-alpha... The equipment used was my 10" f/3.8 newton on a Mesu200 mount, the ccd was an sbig st8300. Both images made with an Astrodon 5nm h-alpha filter using 20 & 30 min subexposures. The first one CTB-1 (Abel 85) is an extremely faint supernova remnant in Cassiopeia. Exposed over 10 hours. Larger version: http://www.astronomie.be/pieter.vandevelde/deepsky/CTB%201%20620%20minutes.jpg The second one probably also lesser known: Sh2-140 in Cepheus, the shock front top right shows some very interesing Herbig Haro-objects. Exposed for 9 hours Higher res version: http://www.astronomie.be/pieter.vandevelde/deepsky/sh2%20140%20525min.jpg Comments always welcome! Thanks, Pieter
  21. Looking good! It looks like M33 is in luminance, or is there that much h-alpha in the central disc? Regards Pieter.
  22. Hi, Sure, here are some pictures that show how I installed the cooling fans on my 10" Newtonian. The cross fans I only added a couple of months ago. I don't know if this is the best possible arrangement, but it works good enough for me. At the rear there are 3 fans displacing 12.7 cfm together, and at the side 2 cross blowing fans spaced 120° displacing 4.7 cfm. The cross blowing fans are arranged like this to minimize any light intrusion into the scope, also some thick filter pads are installed inside to avoid light leaks. Taking some pressure losses and recirculation into account the tube volume is flushed out about 5 times per minute. This might seem excessive but although the carbonfibre tube is very rigid and temperature stable, it can contain a lot of heat energy sucked up during the day which radiates away slowly at night. The fans also cool down the tube itself. I tried several fans but found these to be very silent and vibration free. The only sound you hear is the air blowing. The fanspeed is variable using a seperate control box, but I leave them on 100% of the time. Side / rear View: Bottom view: Inside View: You might want to check out how the Dream astrographs are cooled with the FAST system. They are the best astrographs money can buy (I you have this kind of money...). These telescopes also use cellular mirrors to decrease cooldown times. http://www.dreamscopes.com/pages/07/16inDAtube-02.htm Best regards, Pieter
  23. I have recently upgrades the cooling fans on my imagingnewton. It used to have 3 rear mounted fans, thuis helped cooldown a lot nut my experience was the image only became crisp after 2 hours. I believen rear mounted fans leave a wake in the airflow that deels to stick tot the front of the mirror. My mod was tot add two cross flow fans spaced 120degrees to disrupt the airflow over the surface. The air that is blown tot the sides is then picked up by the rear blowing fans. The tube is 50 mm larger thans the primary. This had drastically improved image quality. I can start imaging in 30 minutes after the scope is set up. Excuses the horrible typing. Regards Pieter
  24. Good day everybody, Last couple of weeks I have been working with my new 5nm Astrodon h-alpha filter, so I thought I would share some results. The filter is a very nice upgrade compared to the old 7nm Baader. The images have been made with my 10" f/3.8 newton and the trusted st8300 sbig ccd camera. Subexposures ranging from 15 min to 20 min. Almost no processing was done, only curves and levels in Photoshop and a bit of contrast enhancement. Some more data would be nice as I didn't use any noise reduction. The first one is Barnard 344; exposure 5.5 hours: Higher res here: http://www.astronomie.be/pieter.vandevelde/deepsky/barnard344.jpg The second is IC5070 The Pelican Nebula; Exposure "only" 2.5 hrs: Higher res here: http://www.astronomie.be/pieter.vandevelde/deepsky/ic5070.jpg The last one taken last night (still need to add more data, still a bit grainy) ic1396 in Cepheus; exposure 3 hours http://www.astronomie.be/pieter.vandevelde/deepsky/ic1396.jpg Thanks for checking them out and clear skies! Best regards, Pieter
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