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CKemu

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About CKemu

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    Star Forming

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    Male
  • Location
    Cornwall
  1. Lunar Phases by Chris Kennedy, on Flickr Click image to see the video, and watch full screen for some of those details to pop. Over several mornings I've shot large mosaics of the Moon, with steadily decreasing seeing conditions. Despite breaking my body clock and surviving on naps, this has been a worthwhile endevour as I've always wanted to show libration, wasn't sure I'd manage it with so few data points, but happily this 4K video (well stop frame animation) shows the wobble nicely and the ever changing surface details. All shot through my LX90 8" SCT with the ZWO ASI290mm camera at prime focus, the largest image needed 42 panels, the smallest 24. Each panel was made from a 15 second video, taking the best 200 frames to stack, mosaic stitched in Microsoft ICE and then ported to Photoshop for a sharpen and levels tweak. Frames dropped in to Premiere Pro and looped for the final sequence.
  2. 73 Percent Moon (Waning) by Chris Kennedy, on Flickr Shot this through mist and pretty poor conditions around 3:30am this morning (had to let it get past some trees), worth it and really enjoying watching some of the craters transform as the shadows grow ever longer. Managed three nights, so had to put together a GIF, admittedly it's not very smooth as you've got a 99.4 waxing Moon, a 92% waning Moon and a 73% waning Moon all in the mix.
  3. 92 Percent Waning Moon by Chris Kennedy, on Flickr That big old Moon is getting in the way of my deep sky work (one day M104, one day!), so decided to set my telescope up at the bar I run to allow people to check out the Moon, and after looking up, I braced the sea air and strong breeze to put together this 7000x7000 mosaic of the Moon with my LX90 8" SCT and ZWO ASI290mm. Typically the new Moon phase looks to be clouded out, might have more luck capturing every phase of the Moon and making an animation!
  4. 99 Percent Moon by Chris Kennedy, on Flickr Shot last night using my Meade LX90 8" SCT with the ZWO ASI290mm camera - was especially fresh last night with a strong cold SW wind, which made the waves on the beach 100m down the road sound very soothing as I did my best to keep warm taking 38x15s videos @ 80FPS - best 200 staked and then stitched using Microsoft ICE and then a sharpen and levels applied in PS. Been ages since I've shot the Moon, as normally I am waiting for it to go away!
  5. Thanks for that, flats I'd considered for dust etc, but removing the vertical stripes I'd not considered, need to figure out how to take a solar flat, but otherwise this does seem like a reasonable solution. I am surprised at the "intensity" of the column response every other line - seems excessive/abnormal, so still waiting upon ZWO to make a response on their support forum.
  6. Recently purchased a the 290mm through FLO and broke the astronomers curse by actually having a clear day to use it within the same week of purchase! Madness! However whilst taking it for a test run on my Coronado Solarmax II 60 (BF10) I discovered that upon stacking and normal processing the sensor displays vertical bands every other pixel, they aren't solid, but it's as if the chip is reading every other column as darker on average. This happens with or without gain, independent of number of frames stacked, or software used, attached is a "raw" image and one that's had levels and a sharpen applied. It shows faintly in the raw and obviously enhanced with the sharpen. I have also attached one that's 5x zoom, just for clarity and detail. I have checked all software/drivers, they're current and tried different USB ports with no change in results. Did a little research and found about 4/5 of the way down in the following link, the page talks about pixel response non uniformity. http://www.astrosurf.com/buil/CMOSvsCCD/index.html - But I would not have expected it to be this apparent, and so badly interfering with processing/the image. I've posted on the ZWO support forums, and await a response - but thought I'd share here for discussion and thoughts. FireCapture v2.6 Settings ------------------------------------ Observer=Chris Kennedy Location=Cornwall Scope=Coronado Solarmax II Camera=ZWO ASI290MM(80453643) Filter=L Profile=Sun Filename=Sun_112444.ser Date=150219 Start=112414.267 Mid=112444.274 End=112514.281 Start(UT)=112414.267 Mid(UT)=112444.274 End(UT)=112514.281 Duration=60.014s Date_format=ddMMyy Time_format=HHmmss LT=UT Frames captured=338 File type=SER Binning=no ROI=1936x1096 ROI(Offset)=0x0 FPS (avg.)=5 Shutter=100.0ms Gain=15 (2%) Brightness=1 (off) AutoHisto=75 (off) AutoGain=off FPS=100 (off) AutoExposure=off SoftwareGain=10 (off) USBTraffic=100 (off) Gamma=50 (off) HighSpeed=off Histogramm(min)=29 Histogramm(max)=219 Histogramm=85% Noise(avg.deviation)=n/a Limit=60 Seconds Sensor temperature=22.6°C
  7. I have a Coronado Solarmax II 60 BF10 telescope which was paired with my ASI120mm I purchased some years ago. The ASI120mm suffered from Newton Rings (fixed with a tilter) and also from horizontal interlace when imaging in H-Alpha (which ZWO never answered/resolved in numerous emails). So the ASI120mm has found use as my OAG camera for my LX90 and Esprit 100ED setups, and does a great job. Quick question, has anyone used the 178mm for solar imaging, have you experienced interlace or Newton rings, I've read some articles that suggest the camera had a global shutter resolving Newton rings, yet FLO and their website lists it as a rolling shutter which AFAIK with CMOS can cause Newton rings? Admittedly I'm not too fussed as my tilt adapter should in theory fix them - but I'd like to know what I am walking in to before making a purchase. This camera will be used with my other scopes for lunar imaging as well, so can anyone recommend alternatives to consider for a similar price point. I can't go much higher as my primary goal this year is to save for a new DSO imaging camera which will take my to a "printable" resolution. Many thanks in advance.
  8. Thank you, yeah the top image is taken with the Esprit 100 and 414EX combination. I've had the Esprit only for a relatively short period, but finding it fantastic, it's got great construction, well packaged and has performed really well with everything I've thrown at it so far. I went from the LX90 8" SCT as my main scope, to this being my deep sky set up, wider field of view, handles stronger wind conditions with excellent focus control by comparison, the LX90 I shall use for planetary nebulae and lunar/planets now. So for me the change was fairly dramatic, not sure what you'd experience/expect going from the 80 to the 100. Would be interested to see what you get out of it, not spoken to anyone with an identical setup yet.
  9. It's been months of rain and clouds down here in Cornwall, so I can honestly say I started feeling a little rusty by the time I remembered in which order to do things whilst setting up! Set up the scope and whilst a nearby street light is a bane, I decided to go for long exposure shots in wide-band RGB and picked two galaxies I've imaged before, but separately through a much longer FL telescope (Meade LX90 8"). With the Esprit 100ED and the same camera (ATIK414ex), I can "just" get them both in shot, along with some interesting background fuzzies, who's distance fascinates me, and I plan to research. This image is really no where near complete in terms of data, I manged: R 17x600s G 12x600s B 18x600s Guiding came out nice with an RMS of 0.45", so glad I discovered drift aligning through PHD2 those few years back. Want to get the data sets over 30x600s per channel, and then do a run of 20 or so H-alpha exposures in the 1200s range to pull out the star forming regions in M81 and capture the full extent of the starburst in M82, which showed up nicely in my 2017 photo with the LX90 8". Hoping we all get some excellent clear skies this ear.
  10. Yeah, tried running it through two laptops and my desktop, no difference. Sadly this is starting to seem like something out of my control, and will require me to save for some time to get a new mono camera. Annoying, but manageable, it's thankfully solar min currently.
  11. No one ever got back to me from ZWO, and no one else had any clues, past few years I have been focusing on deep sky stuff, had a few sunny days, so thought "new rig, new drivers", might be worth a go, nope, still giving me the same garbage performance, incredibly frustrating. I don't recall seeing the interlace patterns on lunar images, my image is 100% and sharpened, here's another one showing the limb, again sharpened, you can see how awful it is in terms of ruining the view of proms etc.
  12. Well if certainly says MM on the camera and FireCapture/windows is reporting an MM being plugged in.
  13. I've had this camera for some time now, about 3-4 years, and initially I used it for some solar imaging, but these days I use it for a guidecam, and it does a perfect job of that, however, tried some solar imaging and it's showing a really grim interlace pattern, I've tried different shutter speeds, gamma settings etc. I've tried different USB ports and even different cables. No matter what, I can't get rid of it. am I missing a trick, is this a software issue (drivers)? Using FireCapture and ASI2.
  14. No star layers used, simply the raw data for each one, mapped to colours, I've attached a screenshot of the layers used in this image. Only one is clipped, which was "selective colour", applied just to make an slight "artistic" tweak to the palette.
  15. I only have Ha (Red) and O3 (Blue) so in Photoshop I assign them to those colours and then use a blend of Ha/O3 to produce an artificial green channel, which gives an overall "true" colour result, but leaves all the stars white (bar halos and other artifacts). Hope that helps. I am glad it's not only me that fails to see the Elephant's Trunk, though the region you highlighted makes sense, so I will go with that! I guess all in all the only "official" name is it's rather plain designation.
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