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alaskacam

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15 Good

About alaskacam

  • Rank
    Star Forming

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  • Website URL
    http://www.thestinsons.net/Astro

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  • Gender
    Male
  • Location
    Anchorage, Alaska
  1. Hello.. I recently went through a divorce and move that found me selling off all my astronomy gear. I'd like to get a setup again for mainly backyard visual observing and some astrophotography. I'm looking at a tripod, mount, scope combo, so things are matched up. I had several scopes in the past, all the way up to a Takahashi TOA-150B, on a pier, in a fixed observatory. I understand a lot about astrophotography, but this new scope will be 80%-90% visual. I'm looking at 9-11" SCTs and maybe around a 4" refractor. I'd be interested in constructive guidance as a lot of the blogs I see are mainly flaming on one company or another for various issues. Pros and cons on portability, field of view, mount quality, contrast, sharpness, distortions, collimation issues, etc. As I want to do some photography and don't want to mess with a wedge, I'll likely stick to a GEM style mount. Thanks in advance... Rob
  2. Love this shot. I'm just starting to play with Ha and narrowband. Opens up a whole new universe...
  3. My first DSLR I used in astro (4 years ago) was an un-modded 350D. As a couple of the others said, the Horsehead is a bad target for that setup. I had similar results. Try some other objects that aren't dim emission nebula. I agree with Olly, the Pleiades would be great. Maybe try M42 to get things sorted out as the Pleiades is a challenge at our latitude (I'm in Oz as well). Clear skies..
  4. Very nice... Like the mix of the stars and nebula colors... Good job...
  5. Thanks for all the comments. Attached is the color version. I need some advice with the Ha in RGB shots. If I use the Ha subs as the Red channel it makes the Flame nebula look redder than it should be as that nebula has a more orange or yellowish tint in natural RGB colors. What I did here is just stack the Ha and Red subs together for a slightly improved red master frame. The Flame is still a bit red and the dusty details in the Ha are somewhat lost or muted. Should I be using a more sophisticated process like I did for this shot of the SMC? Stargazers Lounge - alaskacam's Album: Galaxies - Picture In that one I used pixel math in PixInsight to help Ha pull out the nebulosity in the red channel. It worked well, but I was afraid that it wouldn't with such a Ha dominated area like the Horsehead. Thanks.. Rob
  6. Wow.. Way cool Carl!!! I can only imagine the planning and fiddling that went into this shot....
  7. Dave.. It's the standard Ha filter that comes with the Baader filter set sold with the SBIG STL. I'm not sure how wide the band pass is on this filter. When I finally make the leap to the full narrowband set I'll probably get the Astrodon filters, but still reading up as they can be quite pricy. I'm going to get the remote guide head set up on a second scope before I get the new filters.
  8. I'm just starting to dabble into narrowband imaging. So far only Ha. Here is a stack of 8 x 10 min Ha subs of the Horsehead and Flame nebulas. Shocking how much more detail this pulls out vs the LRGB subs... Rob
  9. Thanks guys for all the responses. I had my Tak mount in a dome and it is well aligned. A 30 minute guided sub is crisp, at least with the internal guider. That may change a bit with a separate scope/guider. I'm leaning towards the 5nm Astrodons, but still looking around. I have a Baader Ha that came with the filter set and can see the challenges with using the internal auto guider with anything other than very bright stars in the field. In decent seeing conditions, I prefer most of my subs are unbinned. With my scope / ccd combination, I can take advantage of the unbinned resolution, most of the time. If I'm adding to Lum subs then 2x2 is usually ok. Thanks again....
  10. Yes, thanks Whirlwind. I would get a remote guider to use on a ED80 that I can attach to my TOA-150B. I posted the question on a yahoo forum and the response also mentioned that it would be a challenge with the 3nm filters to shoot with a scope mush slower than f5, especially in Ha. My current setup gives me f7.3.
  11. Hello. I'm exploring getting into narrowband photography. In looking at the various Astrodon filters available there seems to be 3nm and 5nm filters to choose from. I'm assuming that this is the width of the wavelength band that gets passed through. Any pros or cons between the two would be appreciated. Thanks.. Rob
  12. First clear night in 18 days and my first try with the Ha filter. I have an auto guiding CCD, so keeping the guide star visible through the Ha filter is tricky. This is from 5 x 10 min subs in each L, R, G, B, Ha. Used PixInsight to help with the Ha channel.
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