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Shibby

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About Shibby

  • Rank
    White Dwarf
  • Birthday 31/03/81

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  • Location
    East Anglia
  1. Lobster Et Al

    Great image! You've combined the data very nicely.
  2. Bubble to Cave - Now in colour!

    Great work Rob. I don't know where to look there's so much going on across the image! (yes, I'm still here )
  3. IC5146 - Cocoon Nebula

    That's an excellent image. I really like your processing - you've managed to get nice and deep, have good star colour but not over-the-top. Great job.
  4. Build: My Roll-Over Roof Observatory

    Yeah it wasn't a nice, perfectly smooth surface but overall it was flat enough that the pier still bolted down nicely. The pier seems sturdy and for 6 months I've a second-hand MN190 patiently waiting in the wings for me to finish the obs!
  5. Finally started

    Congrats on getting started! Take your time and enjoy. B&Q bulk delivery bags are £44, but you do need a minimum order of £100...
  6. Can you see stars in other galaxies?

    Yeah it's actually 22,000 LY away! I had heard of stars being resolved in images of M33, so went looking. I did find this: http://www.capella-observatory.com/ImageHTMLs/Galaxies/M33AndNGC604.htm Not sure that would really count as an amateur telescope, though! Maybe somebody on SGL could have a crack at NGC 604
  7. looking to upgrade canon 18-55mm kit lens

    It depends what your exact intentions for it are. The Canon 15-85 is an excellent all-rounder for daytime photography; I barely remove it these days. It's a logical upgrade to the kit lens, but is of course more expensive (you can find some good deals second-hand however.) I've never used it for astrophotography, though. I have often used my Samyang 14mm f2.8 for widefield astrophotography and it's a great lens, but you still shouldn't expect perfect stars (especially when wide open).
  8. M45

    Superb - very deep. Would like to see it a little bit larger, though!
  9. Is Rotation all that bad?

    I'm sure you could improve the look of a rotated image, but instinct tells me that blurring an image in any way loses information that cannot be recovered. Indeed, a quick bit of research seems to confirm this but I'd have to do a lot more to be 100% certain!
  10. UV/IR Filter

    I don't think you'll need it. The Baader Red filter, for example, blocks anything above 700nm, which is where IR starts. I'm not 100% sure about UV, though, in case of the the Blue filter, but I suspect you won't notice any difference, so I'd remove it to reduce any chance of reflections. PS: Narrow-band filters definitely won't need it.
  11. Roll-off roof OBS using Off the peg Shed

    Congrats on starting! Feels good to get things underway, doesn't it? A few tips with regards to the base: I used compressed MOT to form a stable sub-base, so you may want to consider this. Make sure that the surface of the slabs is above ground level, so water doesn't collect. Also, waterproof the bottom of your floor bearers. I suspect you're already aware that you must leave a gap between the pier base and slabs if you want to avoid vibrations. Before putting up your shed, make sure you design your roof very carefully to avoid water ingress. The more planning, the better - trust me! Also, you will want to reinforce the structure with corner pillars at least. I went for a pent roof shed, which I modified (you can see the thread here if you wish). Another tip: Don't expect to finish quickly. Take your time, expect things to go wrong, and you'll find it much more enjoyable
  12. good beginner astrophotography camera

    Poor Some Dude! Don't worry too much about the way bayer matrices work right now... The point is, you already have a camera that you can use for astrophotography so, with a limited budget, I would invest in the mount or optics first. I had a great time imaging with the DSLR I already owned for several years. In the meantime, you could have a go with what you've got - just find the right adapter to connect the camera directly to your mount, set it tracking and focus manually.
  13. Who can tell me somthing new

    The colour of the Universe is beige. (This was on QI) Edit: It's known as the "Cosmic Latte"
  14. Yes, the main 'problem' will be the signal-to-noise ratio of a 4 minute ISO1600 exposure. An 8-minute ISO800 exposure will be far better for capturing the incredibly faint dust around the Iris. (Of course, it's a bit more complicated than that. I'm not sure how 50 subs of one should compare to 25 of the other, for example.) Actually, low ISOs are also better for maintaining star colour.
  15. good beginner astrophotography camera

    I have to comment - the focus issues that you're having with your DSLR are irrelevant to astrophotography. Your telescope's manual focuser is what you'd be using - not the normal focus control on a lens. For beginners, I strongly recommend using a DSLR. It'll quickly give you decent results with its generously large sensor and one-shot colour ability. Your mount and scope are actually bigger barriers to getting started in astrophotography (at least, if it's DSOs you're interested in?) The long focal length, combined with the Alt-Az mount will be a huge challenge in regards to tracking and exposure length. At the very least, change the scope to something like a 130PDS and you should be able to grab 30-second exposures without too many discards. After that, I would look into acquiring an HEQ5 or similar with motors (I highly recommend checking the second-hand market). You already have the camera to get started!
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