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About Tom123

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    Bristol, UK
  1. Tom123


    I've moved from galaxies to nebulae
  2. Tom123

    Progressing in AP

    I started AP a few months ago and I thought it was time I started showing some of my images so I can improve my skills These were all taken with using Canon 1100D through a SW 120ED
  3. Thanks guys. Some things to think about. I'll see about the baader filter. Having to cut back on my astronomical spending for the time being But I'll try adjusting the ISO and the PS magic wand might be an easier trick cheers
  4. Hmm... possibly. Any ideas on how to fix it? I've attached another photo, which is a better example of the problem at hand. This one is processed but as you can see in the brightest star at the top, there's a horrible black line sticking right out of the star.
  5. Hello, Recently, I've started noticing a weird artefact on stars in my photos. It looks like a silhouette of a finger, except it's repeated on most of bright stars at about 4 o'clock. ArtefactM101.tif I've looked at the optical train and there doesn't seem to be anything in the way and clean. Three ideas: 1) It might be some sort of diffraction peak from the Baader UHC filter. I've been doing more AP from my back garden recently, which living in the city and filters off LP 2) I have also only recently modded so I wondered whether it's from that (I've only started noticing since I had it modded) 3) Alternatively, it might be a collimation issue with the scope. The optical train is 120ED, Baader UHC filter (2"), Skywatcher 0.85x Reducer, Canon 1100D. Does anyone have any thoughts on what it might be (and how to get rid)? Many thanks in advance Tom ArtefactM101.tif
  6. I really recommend Astronomy http://www.astronomy.com/ It is a US magazine, but recently included interviews with Brian May, the late Patrick Moore and the Baker Street Irregulars. Interesting to read about UK astronomy scene from the outside POV. Plus it also has regular articles on imaging and visual and it's science features are very good. AN and S@N are good. AN probably has the edge for me (better articles and features). My sub of S@N is often delivered with a huge amount of huge junk mail.
  7. Here's my first image of M33. I was feeling brave that night so this is my first time with 10mins subs - 3hrs in total. I feel it also really benefited just over an hour of darks. Two lessons learnt: get as much data as possible; darks really help with noise
  8. I use a 8 x 50 skywatcher finderscope with DMK cam (you'll need an adapter from Modern Astronomy) and PhD as my guidescope system for my 120ED (F6.4 with the reducer). Works great for me as I only use a HEQ5 pro mount so I'm probably reaching it's load capacity. But I've been getting 10mins subs with few problems (wind, cloud, technological glitches aside)
  9. Hi I use a 9 x 50 for my guidescope with a DMK619.AS (doubles as a very good planetary camera ). Works fine with PHD (see my image portfolio). I find the only problem is I have to push the calibration step up to 3,000ms. I think this is because 9 x 50 has a fairly short focal length which means you need to move the mount more (longer) for the camera to see enough movement. It can take a while for the system to calibrate. I haven't really experimented with other parameters, so they may help. But once calibrated it works well, particularly when I'm pointing my telescope close to the pole (struggles a bit nearer the celestial equator, but that maybe balance issues etc) Tom
  10. I agree - initial alignment is king. I use a widefield eyepiece (hyperion 21mm) and a illuminated reticule eyepiece (I have a Meade Astrometric, skywatcher do far cheapers ones) for my alignment procedure. Find the star with the widefield, then refine with the reticle (depending on what i'm doing i use 1-point or 3-point alignment but that's with a heq5 not a nexstar). Usually gets the object into the fov of my hyperion or camera. But then again, if you're viewing DSOs you don't necessarily want the object dead centre anyway
  11. Thanks for the comments ! I don't know if my technical will go as far as making a filter wheel, but I will eventually get my camera modded and buy a better guidescope - the finderscope has a very short focal length so PHD takes forever to calibrate. Beyond that I think I'm in fantasy land Rather than an obsy, I own a campervan, which I use to escape from the city to the dark skies. Yep, longer exposures, more of them... thanks for the advice Now looking forward to September. Any advice on taking photos of M31? Tom
  12. Hello here are a few photos I took when I first started out in AP last season - it has been a steep learning curve, heavily hindered by a large dose of cloudy nights, but well pleased with M27 and M104 Really looking forward to August/September... Tom
  13. I'm watching it on NASA's site http://sunearthday.nasa.gov/webcasts/nasaedge/
  14. Hi Dubliner, Did you get your problem fixed? My 300P seems to have developed a similar problem. Cheers Tom
  15. Thanks John, Yes, I had seen that, but was trying to avoid as I'm a bit of a sucker for goto I'm afraid. Since there's few autos in the country, I might as well wait to see how much this thing will cost. Cheers Tom
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