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gerry aarts

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About gerry aarts

  • Rank
    Earthling Contributor


  • Biography
    Amateur astronomer since 1984, President: Western Sudney Amateur Astronomy Group 2006/2007/200
  • Location
    Penrith, New South Wales, Australia
  • Interests
    Astrophotography, Musician
  • Occupation
    Real Estate
  • Astronomy Equipment
    Celestron GPS11, EQ Wedge, Williams Optics Zenithstar 80, Meade DSI IIIc, Original Meade DSIc, Orion Planetary Imager v2.

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  1. dsi III Hi Houghy, Yes it is sold and he did not remove the advert. I managed to purchase one on Astromart from Spain. Includes a cooler and other stuff so I am happy. Thanks for the feedback Regards Gerry
  2. Hi Alex, I am interested how much do you want for the camera and associated gear? Regards Gerry
  3. ED 127/QHY 8/H alpha -Lagoon

    Hi Narayan, Looks like you are making progress. I look forward to the colour images. I have a H alpha filter but have not used it yet. Must give it a go from home one night see how well it elliminates light pollution. Gerry
  4. Hi All, After a frustating windy 12 hours at Linden Observatory (Blue Mountains NSW) last weekend I managed to capture this one at around 3.00 am. This is my first ever guided image. Piggy backed Zenith Star 80mm on Celestron GPS11 for guiding. Used the new Orion Guide Camera that comes with PDH guiding. After some initial glitches and some help from fellow WSAAG member Narayan, we managed to succesfully go through the calibration process. Wow how simple is PDH guiding to assist with auto guiding, I love it. The image is 20 x 60 seconds exposures at f3.3 with the Celestron GPS11, Meade DSI III camera. Meade Envisage software auto stacked the 20 images on the fly, rejecting around that many again due to lack of image quality above 80%. Magic software. Regards Gerry
  5. Jupiter 18 August

    Excellent images Paul. I imagine these ar not at prime focus. Did you use a 2x or 3x barlow or eyepiece projection? I have not done well at planetary imaging as yet. I use a C11 and have just purchased a Orion Planetary webcam and 5 x Barlow. Would you recommend using a barlow or eyepiece projection? Regards Gerry
  6. Copernicus

    A ver nice effort indeed. Nice detail You must be happy with that. Regards Gerry
  7. M42 with Hyperstar & DSI III

    hyperstar for meade Hi They do make Hyperstar for Meade at Starizona but it appears only for the 10 inch and 14 inch SCT. http://starizona.com/acb/HyperStar-C694.aspx The "lack of Stars" in the image may be due to the short 15 seconds subs although I imagine there are stars at 15 or 16th mag in this image. I have attached the Luminenece image that, other then applying some levels and curves to bring out a bit more detail is virtually unprocessed. Check out the corners, they appear in a fan shape, like fanning a deck of cards. The scope was in altizimuth mode, the DSI Envisage software derotated the images whist at the same time stacking them. A "software" wedge or EQ mount. Amaaaaaaazing technology available to amateurs.. This is a fantastic advantage for portable set ups. I think many astrophotographers out there don't realise the power of the DSI and the software provided with it. Who would have thought it possible to capture quality, deep sky objects in altizimuth mode only a few years ago??? Meade have realy outdone every other CCD camera manufacturer in this regard. Regards Gerry
  8. Hi All One of the most spectacular edge on spirals you can view through your telescope. The bright central core bulges out of both sides of the galaxy. Around 49 million light years distant this is how our galaxy would appear if approached edge on. Note the 14.40 magnitude galaxy NGC 4562 at the lower right. It would very unlikely you will ever get to view that one through your telescope. Amazing detail in short exposure images that are revealed when combined with the f1.8 Hyperstar lens. Imaged at our WSAAG Linden dark sky site in the Blue Mountains, NSW Australia. http://wsaag.org 10 x 15 seconds combined exposures. Celestron GPS11, Hyperstar f1.8 lens, Meade DSI 111 camera. See more galaxy images on our WSAAG club web site http://wsaag.org Regards Gerry Aarts President WSAAG
  9. My second attempt at processing this image achieved more detailed nebulosity then my first attempt by simply using the “Shadow” function in Photoshop. We were running a Photoshop tutorial at our WSAAG June meeting and the “Shadow” function was shown to us by WSAAG member Narayan. Imaged from my back yard in Cranebrook, a fringe Sydney suburb, medium level light pollution. The only filter used was the IR filter that comes with the DSI. No H_Alpha filter. Amazing detail for 15 seconds subs. Celestron GPS11 in altazimuth mode, Hyperstar f1.8 lens, Meade DSI III camera. 40 x 15 seconds (8 minutes) total exposures. For those of you interested, our Vice President Rodney Moulder, has created a free online Photoshop tutorial that outlines the major processing steps you need to know. Go to our web site http://wsaag.org and check it out. Regards Gerry President WSAAG
  10. Moon Halo

    moon halo That is a very good Moon halo image. I have seen the halos from time to time but have not imaged them. Well done. Regards Gerry
  11. Hot pixels Trifid Nebula Nope, hot pixels appear white and I used dark subtract to eliminate any hot pixels. My starry-night pro software does not show hundreds of the stars in the image, (see attached) but is that because the the software we use has not identified the stars? ( Me thinks the image is more accurate then the software). Regards gerry
  12. trifid nebula Hi Guys thanks for the comments. The scope was polar aligned on my eq wedge, about 98%. Don't know what the red stars are. The camera and f1.8 lens is a very sensitive set up as you can see by the multitude of stars in the image. I think you would not see most of them with your eyes through a high powered telescope. Regards Gerry
  13. m21 Hi Patrick The image is approx 25% cropped. The DSI III is a 2/3 inch chip v 1/2 inch for the DS 11. Together with Hyperstar it provides a large field of view. Is that your observatory in the avatar image? If so, I'm so jealous I will have to come up and visit you. LOL. I am hoping to set up an observatory in the future. Regards Gerry
  14. Hi All, Imaged this one at our WSAAG Linden Observing site in the Blue Mountains near Sydney. http://wsaag.org Got some good nebula detail and star colours in this 9 x 30 seconds combined exposures. Amazing results for such short exposures with Hyperstar. Celestron GPS11, EQ wedge, Meade DSI III, Hyperstar f1.8 Lens, Processed in Photoshop. Regards Gerry
  15. DMK Saturn - No Barlow

    Saturn Hi Ray, Over how long a time frame and how many individual image frames are your 500 stacked images, eg: 500 out of 2000? Did you eliminate the poorest images? What telescope did you use? What f ratio? Planetary imaging is ideal at f20 or f30 (2X or 3X Barlow). Transparency (stable atmospherics) is also important. Accurate colmination is another one, a slight miss-aligned mirror and you have a blurry image. Imaging time for Jupiter should not exceed 90 seconds due to planet rotation creating blurring images. I am not sure on Saturn on this issue. Imaging planets in my opinion, is actually more difficult then imaging a distant galaxy. Regards Gerry