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ejwwest

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Everything posted by ejwwest

  1. I'll reprocess later with the darks I took and check out the DSS settings for comets.
  2. Quick attempt this morning - didn't have good tracking on the guider so a satck of 12 10 second exposures with Canon 40D and 400mm f5.6 zoom at ISO 1600. May try reprocessing later: Comet 2013 R1 (Lovejoy) by ejwwest, on FlickrISON was too low from my location and too much twilight when it did rise.
  3. Excellent. Was clouded out here in Hampshire!
  4. Since I can probably get a good price on the body of the 70D (a place on Tottenham Court Road offered me £60 off list price) I may go for getting my 40D modded rather than trading it in at LCE.
  5. The faster frame rate, wifi and larger ISO range make the 70D significantly better (though why Canon missed the GPS tagging they have in the 6D beats me). I daresay there'll be a 70Da sometime.
  6. I now have approval from my "financial controller" to upgrade my camera from the Canon 40D I've had since early 2008 to the just launched 70D. Anyone got any opinions on the pros and cons of the 70D over other options (I have a number of EF-S lenses which makes an upgrade to a full frame camera very expensive).
  7. Thought I'd try this with autoguiding. This has 4 subs of 5 minutes each at ISO 1000 with flats, darks and bias frames. M11 - "Wild Duck" Nebula by ejwwest, on Flickr I may try re-processing as the orange stars I've seen on shorter single exposures don't seem to stand out, but the number of fainter stars is much greater.
  8. Reprocessed to remove a light frame that had ghosting and used some of the more advanced DSS options and hand tuned the levels in PSE as Francis recommends above:
  9. I post-processed with PSE 11 - used Auto-Levels and then played around with Curves, hue and saturation until it looked reasonably pleasing. I could try again and see whether it can be improved further.
  10. M27_edited-1.jpg by ejwwest, on Flickr22 auto guided exposures stacked with total exposure of 58 minutes.
  11. Sunspot AR1835 by ejwwest, on Flickr p Taken with Imaging Source DFK21AU618 CCD Camera. Processed with PIPP and best 1200 frames of 2700 selected. stacked with AutoStakkert, sharpenned with Rergistax and PSE 11
  12. I found even at ISO 800 and f3.5 only the brightest meteors (say around mag -3 or brighter) showed up, at least on my (10mm) wide angle lens. I guess they move so fast. I took a lot of shots mainly at 30" but also upto 3 mins and found very few meteors on the frames even on those I stopped exposing on when I saw a bright meteor cross the field. Doubtless had I used my 50mm f1.4 lens, I'd have picked up more had they entered the much smaller field of view but that would have considerably reduced the number anyway. As always there were times a bright meteor showed up between shots!
  13. I knew that the ISS was due overhead whilst observing Perseids last night, so changed the camera direction to take this shot at around 2300 on 12th August: International Space Station crossing overhead by ejwwest, on Flickr I noted that a couple of perseids did cross the field whilst I was taking this exposure but don't seem to have been bright enough to have registered.
  14. Excellent, especially with the bridge to add armosphere. I too found the camera usually pointing in the wrong direction or the meteors not quite bright enough to register.
  15. Cropped version of the above photo: Perseid.jpg by ejwwest, on Flickr
  16. Here's a shot from tonight: _MG_7574.CR2 by ejwwest, on Flickr
  17. I set mine up to do some 3 minute exposures at ISO 400 (tricky tradeoff between picking up meteors and too much light pollution but in the end it was the thin cloud that made it too difficult). I actually saw this meteor (probably about mag -4 and showed structure in the track that the photo doesn't show) and stopped the photo immediately after. Then my cheapo remote controller stopped working around the time more cloud appeared so gave up after I saw and photographed one more bright meteor (also up on Flickr)!
  18. There was a lot of light cloud making long exposures impossible, but I caught this one on camera. I saw it myself and it was very bright. Perseid Meteor by ejwwest, on Flickr
  19. Taken at the prime focus of Celestron EdgeHD 925 scope: International Space Station closeup by ejwwest, on Flickr
  20. Stack of 8 1 minute exposures at ISO800 with a Canon 40D DSLR at the prime focus of the EdgeHD 925: M82 - "Cigar" Galaxy by ejwwest, on Flickr Stacked with DSS and then tweaked with PSE 11.
  21. Wonderful pictures. Makes me conclude there's not much point in persisting with my DSLR and freeware!
  22. I finally managed to get both a good clear night and time to set up the scope with the autoguider I got at Christmas! The photo of M3 is with 19 stacked shots with DSS using the autoguider for 1 minute and 2 minute exposures with nearly 23 mins in total. All at ISO 800. Still getting a fair amount of streaking from DSS and the output was distinctly reddish which I reduced in PSE11. M3 - Globular Cluster in CVn by ejwwest, on Flickr The M51 is without the autoguider (didn't have the time or patience to get a guide star) and 6 1 minute exposures stacked by DSS: M051 - The Whirlpool Galaxy by ejwwest, on Flickr
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