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RogerOfHeaton

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About RogerOfHeaton

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    Nebula

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    Newcastle upon Tyne
  1. Hi Folks, I know this is an old thread but anyway....I got my 250PX back in March 2014, and then "graduated" (yeah right) to an equatorial platform bbut was not satisfactory. I finally made the move to an AZ EQ6 GT mount in January 2015, and it has worked well for imaging. Two provisos - get a coma corrector - I use both a Skywatcher 0.9x coma corrector and also a Baader MPCC III - and only image when windspeed drops below 12-13mph.
  2. Thanks for responding, StamosP. My understanding was that if it was just the focuser protrusion, the Baader and GSO would give a similar effect. My understanding from folks like Louise in Glasgow, who has the GSO, and the guys who started this thread on pages 1-3 like Uranium, who has had both Skywatcher and Baader types, that they don't have the same effect. If I'm wrong, then OK. If so, then I'll give serious consideration to the MN 190 DS Pro, which is coma-free apparently, and needs no corrector.
  3. Hello Folks, I run a 130 PDS and tube-ring converted 250PX ex-Dob newt on an AZ EQ6 GT mount, using the Skywatcher 0.9 coma corrector. This is with a modded DSLR On the 250PX, the bright star shapes are good and the coma corrector is fine. On the 130 PDS, no matter how I set up with the Skywatcher CC, the bright stars in the image are flattened on one side. It has begun to cheese me off somewhat, and so I'm considering a second CC alternative for the 130 PDS. I've attached a cocoon nebula image to show the effect. I've read this thread back to front, and I guess the Baader MPCC III and/or the GSO are the main candidates. My first question is do either of these have any drawbacks at all? I understand that some users have had spacer probs with the Baader but only with narrowband and filter drawer. I also understand that the GSO pushes the scope focal ratio out to 5.5. No big deal, although I'll admit I do like the 0.9 cc for bringing the focal ratio down to 4.7. My second question is.....Is it possible to use a star mask and modify the flattened side? In PI there are loads of erosion options but can't see anything to refill up on one side. In CS2 Astronomy Tools I can brighten or diminish the whole star but that's it AFAIK. Any feedback much appreciated. Thanks folks.
  4. Hi TingTing, My imaging train is a modded Canon 100D, a relatively light DSLR, fitted with a Skywatcher coma corrector. Also using an Astronomik CLS clip LP filter. Thinking of switching this to a Hutech IDAS P2. The thing is.......the filter is about the same price as the 130 PDS......seems the wrong way round but there you go. As you can see, I am still plagued with gradient and focus hassles. I've been using DSS and Photoshop CS2 and running the Gradient Xterminator trial. For galaxies and clusters it works reasonably well but for nebulae I seem to fall into deep kimshee. Star colours are coming out ok but I seem to muck up on curves and levels and colour balance. Take the M81/M82 shot, for example. My individual subs clearly show a red hue in the middle of the M82 "cigar shape" structure. After stacking and histogram stretch and saturation shift, I seem to lose any red in the finished image. Never mind, I'm learning a lot and loving the journey. Thanks to all in this forum for their inspiration ad tips, re balance. In time I'll switch to guiding and EQMOD and CCD but for now I'll keep learning my ABC and times tables, so to speak.
  5. Hi Folks, I'm still learning both my mount (EQ6 AZ GT) and the 130 PDS. Here is my March work in progress:
  6. Bloomin 'eck Uranium....I hesitate to post, having seen that last image. To hell with it....hello folks, this is my first attempt with a modded Canon 100D with Astronomik CLS clip filter, using the Skywatcher CC, sitting on the 130PDS, sitting on an EQ6 AZ GT. 27 x 210 seconds with darks, flats, bias and dark flats. Unguided. Have managed 4 minutes unguided but playing safe. Totally incompetent but keen as mustard. Cheers.
  7. RogerOfHeaton

    Alnitak Region

    My first attempts at modded Canon 100D on the 130PDS, sitting on the EQ6 AZ GT.
  8. I just want to say thanks to the contributors on this topic. I have finally.....finally....finally....got good balancing with the 130 PDS with my imaging train (100D + cc). I was going daft but then I read the posts.....and then made up 2 x 500g home-made counterweights, secured them to a spare large dog collar (literally), and velcroed them to the mirror end. It has worked like a dream. Thank you folks. Now happy to recommence imaging with my EQ6 AZ GT. Cheers.
  9. Just to add some input, I've had the EQ6 AZ GT for a couple of weeks now, and am admiring it more and more. The Dec and R.A. clutches are really cool. I've got PA pretty much ok now but my goto alignment has had me climbing the wall until I read the various threads and also the Sky at Night review. After PA I kept getting the mount slewing to the wrong part of the sky for the first alignment star. Finally realised that after PA I have to return the mount to the Home position, turn off, turn on, then start the goto alignment. After that, all the alignment stars popped into finder fov, just so. Nothing in the manual about that. Ah well, we move on. Loving it all though. Even the frustrations. Finally managed to sort out the proper balancing of my 130 PDS newt. It's such a short tube and the mirror isn't that heavy. So, the imaging train of focuser-coma corrector-dslr is relatively heavy compared to the whole ota. Needed an extra kilo at the mirror end on the opposite side to the imaging train to get proper balance at all angles. Feels really good, folks to finally get it nailed. Thanks for reading. Daft old [removed word] signing off.
  10. Just to make an introductory post here, I have just "upgraded" from a 10" Dob to the 130 PDS on the EQ6 AZ GT mount. I've a lot to learn but looking forward to much heartache and joy, probably not in equal proportions.
  11. Just to finish my modest input. I finally went for the EQ6 AZ GT with the 130 PDS newt, plus a 0.9 skywatcher coma corrector. Got the EQDIR adaptor. A lot to learn but have a good feeling about it. Awaiting a Maplin power supply to use with Astromiser cigar lighter adaptor. Swapped the mounting around by 180 degrees to give me a north pointing tripod leg, plus a comfortable position for the polarscope, as suggested in the Steve Richards FLO review of the mount.
  12. Many thanks folks for responding. It is looking like February-March '15 for pulling the trigger. In terms of bangs per buck, my impression is that I either plump for maximum stability and better load capacity using the EQ6 AZ GT at £1300 from FLO or perhaps less stability (perhaps) and less load capacity using the Advanced VX but have £600 left over to get an autoguiding system and or GPS plus more mobility with the lighter weight. Totally perplexed at the moment. Hope I make my mind up by February. Also perplexed over Celestron emphasis upon ASPA - shows great confidence - they don't even include a polarscope by default. Forums here on the VX suggest that ASPA is the way to go, particularly if polaris is not always visible from ll parts of a back garden. On power supply, I may take the precaution of opting for the Baader 5A 12V supply, which gives better stability at low temperatures, particularly if mount/CCD probs are to be avoided, whichever decision I make on the mount. For me, there seems to be a bit of a gap on comparative reviews on mounts between say £500 - £2000, particularly since for astrophotography it is such a key component. Many thanks once again. Best wishes for xmas and 2015. folks.
  13. Hi Folks, Newbie question I'm afraid. Looking to get my first EQ mount for imaging using a 130PDS newt initially. Looking at Advanced VX, NEQ6 Pro Synscan and the EQ6 AZ GT. I think I may also be using a 200 PDS as well. My simple question is - Would the EQ6 AZ GT be too much of a steep learning curve for a newbie like me. I currently run a 254mm Dobson on an Eq Platform. I do some astrophotography but obviously, the Dobson is more of an viewing light bucket. The price range for these 3 mounts is roughly £750 - £1400. Capacity, mount weight and "you get what you pay for" suggest EQ6 AZ GT. I just worry that it could be too complicated as a first EQ. The budget is not a concern. Grateful for any comments. Cheers and thankyou.
  14. Thanks for the feedback folks.Much appreciated, both. I of course, have no experience of the AVX. I do however have a little experience on power supplies, in particular ccd video cameras. Cheap, underspecced power supplies are frequently responsible for video camera under-performance, due to inadequate consistency of power supplied, particularly with varying ambient temperature. Users generally overlook this and blame the camera quality or some environmental factor. That's what warmed me to the Baader unit, in that the general description highlighted those aspects, which mirror my experience. The Celestron power connection does provide some security screw feature but I have read an AVX 1 STAR review by a user, where due to their accidental tripping over the trailing cable, they tore out the housing on the AVX power connection, because of this "security" screw feature. I appreciate your insight Louise on the fitting. Have seen various equivalent non-screw units for £19-£30. Compared to the £900+ overall bill for the imaging rig, I'm comfortable with a £55 rip-off spend for the foreknowledge of a consistent power supply. In future years (I hope), I'll also be pushing the envelope on imaging payload weight, with bigger OTA, autoguider rig and imaging train with coma correctors, zoom eyepieces and Barlows, etc. Thanks again.
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