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Lrlinnell

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About Lrlinnell

  • Rank
    Nebula

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  • Gender
    Male
  • Interests
    photography, flying, running, wine making
  • Location
    Denver, CO
  1. Thanks, I checked out the ADM website and it looks like it will have everything I could possible need. Lloyd
  2. Attached are some photos. On the bottom of the OTA is the orange dovetail bar that attaches to the tripod and mount. There is only one place on the OTA that the holes line up for this dovetail bar. The spacing on all the other screws on the OTA do not match this bar. Celestron supplied a finder scope bracket and it has holes that align with screws on the top of the OTA. It is a "dovetail" of sorts - wedge shaped - but is wider than a vixen and smaller than a Losmady bar. The finder scope they supplied mounts into a holder that fits onto this finder scope bracket as shown. There are screws on the top of the OTA, to the right of the finder scope bracket where I could add my auto-guide scope, but the screws do not align with a vixen or Losmandy bar and I'm not sure what I need to purchase to be able to attach a auto-guide scope to the OTA. Any ideas???
  3. On the bottom of the OTA it does - but on the top side, where I would mount a guide scope, it does not. I would need a 13 dovetail "female" or the one that has the adjustment screws, so that the dovetail bar would be on the guide scope. lloyd
  4. I just purchased a Celestron EdgeHD TM 800 CG5 Optical tube (8") and it comes with a finder scope and bracket. I want to also attach my auto guider scope and ccd to the optical tube. The mount that they provide is not a vixen, looks like some kind of proprietary attachment track. How do I attach a vixen device to the tube? In looking at the Celestron accessories, the only thing I found that would attach to the 8" tube is a standard camera mount. How do people attach finder scopes, guide scopes, etc to these 8" tubes?
  5. When I get the Celestron 8", I will start with M101 - it should be a better size match to the Celestron 8".
  6. This is my first astro photo, taken with a Canon 5D Mark III using a 100-400 lens. It has star trails and the center is blown out but I am really excited to see Andromeda Galaxy for the first time. This was taken using a camera tripod and Astrotrac tracker. I now have a real mount (Orion Atlas-Pro) and a real scope is on order (Celestron EdgeHD 8" CG5) Lloyd
  7. I just purchased an Orion CCD autoguide camera that has the built in ST-4 interface. I did so because I thought that would be a cleaner connection directly from the ccd autoguide camera to the mount. But I just read that if you use the CCD ST-4 interface directly to the camera, the protocol does not support providing pointing information to the guide software. e.g. PHD documentation states that if you use CCD -> PHD -> USB 2 serial interface -> hand controller, then PHD can tell what side of the mount the telescope is on and where it is pointing so it can guide better and you don't have to reverse stuff when you flip. But if you use the RT-4 interface, PHD can not obtain that information since the protocol does not support it. Thinking of returning the Orion CCD for one that does not have ST-4. Would that be the correct thing to do? Thanks, Lloyd
  8. I think the weight will be an issue. Won't be much good guiding if it flexes and wiggles. I'll look into mo stable methods.
  9. Anyone have experience mounting a finder scope/autoguider (Orion Deluxe Mini 50mm Guide Scope) onto the hotshoe plate on the top of a DSLR camera? The finder scope has a 1 1/4" dovetail base (shoe) and also a adapter plate but I need something with a hotshoe fitting on one side and a plate or a dovetail female on the other. Thanks, Lloyd
  10. Should I keep all my light-subs or only the final stacked image? My subs are 24 meg each so from a work flow perspective it would be nice to be able to toss them and just keep the final "stacked" image for processing. Also, same question on darks. Can I create a library of darks at temp & exposure and only keep the masters not the subs? Thanks, Lloyd
  11. thanks for the pointer to astrobin.com. I'm there now looking through images, camera's and telescopes Thanks again, Lloyd
  12. I am about to purchase an Orion EON 130mm ED Triplet Apochromatic Refractor Telescope and wonder if anyone out there has ever used one? Orion has been unable to tell me how this would match up with my Canon full frame sensor on my 5D Mark III so I'm wondering if there is any experience with using this scope with a full frame DSLR sensor. Lloyd
  13. Thank you both for your knowledgeable comments. Based on the fact that I have to transport the scope to a dark-site I will go with the refractor for the faster set-up. About to pull the trigger on an Orion EON 130mm Triplet Apochromatic (130mm aperture, f/7.0, 910mm focal length. Using the FOV calculator that Brown Dwarf pointed me to, this looks like it would be fine for Andromeda Galaxy, Orion Nebula, Triangulum Galaxy, etc. Any knowledge about whether this scope call fill my full-frame sensor in the Canon 5D Mark III? Thanks, Lloyd
  14. I have been using my Canon DSLR 5D Mark III with a 100-400 L Lens mounted on a Orion Atlas-Pro AZ-EQ-G mount for astrophotography of stuff like Orion nebula and Andromeda galaxy but now it is time to purchase a scope. I had been thinking of refractor APO Triplet but it seems that a lot of people are having good luck with Newtonian scopes like the Orion 8" f/3.9 Newtonian Astrograph. I would be doing strictly astrophotography, guided, BackyardEOS and PHD. Any thoughts on what might be a good scope? I would start with the scope, Canon camera body, mount. Then add guide scope. Then replace the Canon body with CCD. That is the plan anyway. Thanks, Lloyd
  15. very interesting. Being new to this, how would a Canon L series pro photographic lens compare in those areas you mentioned to a telescope lens? I'm sure the answer is "that depends" and then something about quality and price but can any general statements be made? If I have an $1,800USD 400mm Canon lens, would it be significantly worse in those areas than an $1,800 400mm telescope? Or is there just no way of telling? Thanks, Lloyd
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