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Found 13 results

  1. I present you an image of the Flaming star nebula and the Tadpoles. I have 2 versions. Ha only and HOO. I started with 4 panels mosaic shot with the 130PDS, each panel is ~2h exposures. Then I shot another 7.5h with the Canon 300 F4 L lens, but the result was awful, compared to the mosaic. So I added this only in a small amount and only on the darker areas of the image. For the O3 image I only used the Canon lens. The IS element inside gives me a lot of headaches, and I have coma in some corners, other corners are out of focus, etc. And it behaves differently each session. Not only the IS was not playing nice, but I also had focus shift due to temperature drop and I did not refocus. The camera used was the ZWO ASI1600MMC, cooled to -15C. 180s subs at 300gain with the 130PDS and 300s subs at 139 gain with the Canon lens. Mount: AZ-EQ5. The lens was wide opened and the newton was corrected with a SW coma corrector, hence the halos around the brighter stars. Guiding: OAG with 130PDS and side-guiding with a 200mm lens for the Canon lens shots. Software: APT and PHD for acquisition; DSS, APP, StarTools, Registar, GIMP for processing. When blending the O3 I had to abuse star reduction, star removal, heavy blurring, masks, layers, etc. for a decent result. Link to a better resolution and other details: http://www.astrobin.com/315278/D/ Thanks for watching, Alex
  2. This is a bicolour image of IC410 I managed to grab between the clouds a couple of weeks ago. I processed it sort of the Cannistra way with Ha as red but with OIII as blue-green hoping it would give more true colours. The green channel was sythesized from the Ha and OIII channels. The star cluster in the middle is NGC 1893 and it is the stellar winds from this cluster that shapes the nebula. 14x10 min OIII Bin2 and 11x10 min Ha Bin1. Imaged with OO AG12 and Atik 460. /Lars
  3. Imaged with the usual gear (Tak E130D, G3-16200 and chroma Ha 3nm, PI for processing) over four nights but still only 9x30 min due to Yorkshire cloud. A mixture of average and very ropey seeing and a bit of moon thrown in on a few of the subs so not quite so crisp as some of my previous attempts with this kit. Not sure I've rung all I can out of this with the processing but was getting to the point where I found it hard not to blow out the brighter regions of nebula (including the tadpoles). Have avoided the (dreaded?) HDR wavelets so far but might be tempted to blend some into this version (especially if I can get the noise down with some more subs). As ever C and C's welcome! Paul
  4. Dec

    NGC1893.jpg

    From the album: Dec

  5. This is the second of three images I will posts of this target for the challenge. They were all taken the same night (16-17 Dec 2917) with my new triple rig (a Samyang 135 f/2, a Canon 300 f/4 and an ES 127ED 5" refractor sitting side by side with Canon 60D cameras on them) in my garden obsy on the Swedish countryside in Värmland. Temperature fell from -7 to -14°C during the night. The ground was snow covered so SQM was around 20.5 (a bit lighter than usual) Camera: Canon EOS 60D (unmodded) at ISO1600. Lens: Canon EF 300mm f/4 L USM (@ f/4) Mount: SW EQ8 Guiding: SW ST80 + QHY5LIIM + PHD2 Exposures: 134 x 3 min = 6.7 hours Filters: None Stacked: PI. The image is a mosaic of two frames that have a 50% overlap in the centre of the image Processed: PS CS5. I have added a small amount of data to the tadpoles taken taken with the 5" refractor in Feb 2017 (which may disqualify the image but I leave that to the judges) Cheers, Göran
  6. Saturday nigh was the first clear night for what feels like eons and I fired up my triple rig (a Samyang 135 f/2, a Canon 300 f/4 and an ES127ED refractor, all connected to Canon 60D DSLRs) to collect as much entertainment as possible. I just "finished" processing the 300 mm data, which became an accidental mosaic since the framing on this lens shifted about 50% after the meridian flip at midnight (I only bothered to frame the refractor). The central 50% of the image contains data from both before and after the flip. No idea why it shifted but my rig is far prom perfected yet. The subs were stacked with Pixinsight and further processing was done in PS. SQM was only 20.5 (I usually get above 21) mainly due to a complete snow coverage lighting up the sky. Noise was low though due to natural cooling: the temperature fell from -7 to -14°C during the night and all my stuff were covered with frost. 134 x 3 min subs so 6.7 hours (Canon 300mm f/4 connected to a Canon 60D at ISO 1600) Comments most welcome! (Pixel peepers may be upset. I think I have some tilt in the Canon 300 / camera set up but I have no idea how to fix it so I have been fighting a bit with star shapes in this image - I will try stopping the lens down next time)
  7. This is only my second image with the new camera, so please be forgiving! Atik460EX on HEQ5. 19x 600 secs Ha mapped to Red. 19x 600 secs OIII mapped to G and B. Processed in DSS and Photoshop. I suspect i may have overprocessed - I am super keen to learn a number of techniques and perhaps used too many!
  8. After hours of stacking 360 subs with PI, stitching and processing in PS, I finally have the result from the little Samyang 135 f/2 from both before and after the meridian flip from Saturday night's triple rig session. Totally 360 x 1 min, so 6 hours (with a Canon 60D at ISO1600). Like with the 300 mm scope it became an accidental mosaic as the image had shifted quite a bit after the flip. So, a a kind of wide wide-field image. My previous post of the images from this session is here: Comments and suggestions most welcome as always! Cheers Göran
  9. dokeeffe

    IC410-150min-HA.jpg

    From the album: Dereks Album

    Poor image, focus and collimation problems. Image taken Feb 4/5 2017 15 x 10min Celestron C11 + starizonia .63 reducer Baader HA 7nm Atik383L+
  10. Friends, here are the preliminary results from my third go at using my triple rig, when it finally cleared on Saturday night (sadly my second go was a month ago since the clouds and moon has been conspiring as usual). I have already posted the image from the Canon 300mm f/4 but include it here again. I am thinking of adding the long FL data to the short ones, but that will be a processing exercise for future cloudy nights. Temperature was down to -14° so I was freezing my a.. off but the DSLRs loved it so no noise reduction used. Acquisition details (all at ISO 1600 and on an EQ8): Samyang 135mm f/2 (@f/2) with a Canon 60D, 181 x 1 min = 3 hours (I have another 3 hours from after the flip that I have not looked at yet - took PI a whole morning to stack the first 181 subs) Canon 300mm f/4 (@f/4) with a Canon 60D, 134 x 3 min subs = 6.7 hours (this is a two panel mosaic) ES 127ED apo with a TS 0.79x reducer, so FL 752 mm (f/5.9) with a Canon 60Da, 40 x 10 min = 6.7 hours Stacking in PI and processing in PS. So, about 20 hours of data in one night to play with.... Comments and suggestions most welcome! Cheers Göran
  11. This is the first of three images I will posts of this target for the challenge. They were all taken the same night (16-17 Dec 2917) with my new triple rig (a Samyang 135 f/2, a Canon 300 f/4 and an ES 127ED 5" refractor sitting side by side with Canon 60D cameras on them) in my garden obsy on the Swedish countryside in Värmland. Temperature fell from -7 to -14°C during the night. The ground was snow covered so SQM was around 20.5 (a bit lighter than usual) Camera: Canon EOS 60D (unmodded) at ISO1600. Lens: Samyang 135mm f/2 (@f/2) Mount: SW EQ8 Guiding: SW ST80 + QHY5LIIM + PHD2 Exposures: 360 x 1min = 6 hours Filters: None Stacked: PI. The image is a mosaic of two frames that have a 50% overlap in the centre of the image Processed: PS CS5 Cheers, Göran
  12. I think I'm done with the Hydrogen layer for these nebulae. I started 3 weeks ago a 4 panel mosaic with the 130PDS. I shot around 2h on each panel in 180s subs at 300 gain. And recently I thought to lower the noise in the darker areas and I shot another 7h with the Canon 300 F4 L and I combined the dark areas. I see now that I should have taken more frames with the scope as the quality of the image taken through the lens is way lower. Anyway, I still combined them a bit. The plan is to add LRGB too in the future and perhaps some O3 as well. Full resolution 16 bit .png here: https://drive.google.com/open?id=0ByhJ_xuQxcnjNjdyMUpqSkJFYUU And, in order: the image taken with the lens, the one with the scope and the blend. Thoughts are welcomed. Clear skies, Alex
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