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zakky2k last won the day on January 17 2014

zakky2k had the most liked content!

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45 Excellent


About zakky2k

  • Rank
    Star Forming

Profile Information

  • Gender
  • Interests
    Mainly Galaxies / DSO's. Hoping to learn more about planetary imaging techniques.
  • Location
    Plzensky Kraj, Czech Republic

Contact Methods

  • Skype
  1. Hi PhotoGav, I've been looking at the WO 71 Star and was wondering how you manage to attach the QSI683WSG?

    Was it mounted on to the M48 thread or did you use the 2" nosepiece / draw-tube on the scope?


    Good luck with the transit!!!


    1. PhotoGav


      Hi Zak, sorry, only just seen this message - you should direct message me for a swift reply! I attached the QSI to the M48 thread of the WO Star 71 via a slim adapter of some sort. I can't remember the exact details as it's been a while since I've used that scope, but I certainly didn't use a 2" nose piece. Good luck, Gav.

  2. zakky2k

    2017 New Years Session

    The clouds left way to crisp cold but clear skies from December 29th till Jan 3rd, allowing for a few chances to snap some pic during my Christmas break.
  3. zakky2k

    2015 December

    2 clear nights only...
  4. zakky2k

    2015 January

    New year, new filters, new photos!
  5. Good to know! I've been considering some UV work for planetary imaging. It seems Venus starts showing some decent details at these wavelengths, but I'd really need to move up to bigger diameters/longer focal lengths to get the resolution. This comes back to your previous point about sensor size, there is always some compromise to be made! However I'm still satisfied with my choice and the camera performs great, I just wish there was a few more clear nights!
  6. Beautiful shot! I remember the Maxim help stating that the curve should be 30%-50% exposure, so assuming 1100D has a 14 bit sensor then the max value (i.e. burned out white) will be 16384. 50% of that is 8192...
  7. Hmm, did you try contacting the manufacturer with the sample flats to get their opinion, just in case it is a defect in the filters? I would still try capturing the flats with a natural source to ensure the filters aren't interfering with the specific light emitted from your panel. There is some similarity between the LRGB illumination/unevenness (i.e. top left corner). Did you try rotating your light box and observing the resulting flats? If any unevenness also rotates then there's an issue with the panel. Again, taking some flats outside using the clear blue sky (with simple cloth filter if too bright) would eliminate a lot of variables...
  8. Your Ha and OIII would benefit from flats to even out the dust motes and any other irregularities, but as others have said if they're all clean then using one flat for all filters can be considered, but I am curious why the artefact occurs with only those two filters? Does the Ha have a narrower bandwidth than the others or have some different physical properties to the others (thickness, mounted vs unmounted etc...) which could cause different reflections ? Were the exposures significantly longer or did you have to screen stretch more? Either could be highlighting the same properties that actually exist in all other flats just not immediatly apparent. A quick check would be to compare the ADU values for the HA edge within a similar range to the central areas?
  9. Are your filters parfocal? If the SII and OIII are thicker could that contribute to the vignetting? It also looked like they were significantly dimmer, which lead me to wondering what light source you're using when taking the flats, and how do you ensure even illumination? Just thinking if the "problem" filters might be blocking that frequency causing the uneven illumination. If it's an artificial source try outside at dusk/dawn and vice versa... 7nm doesn't let much light through but clear sky would be enough while Its still bright enough or with longer exposure? Word has it Santa's delivering my first OIII and SII filters at Christmas, so I'm keen to figure out hurdles like this!
  10. zakky2k

    2014 - May

    First opportunity of 2014 for observing...
  11. zakky2k

    July 2013

    My first chance to spend some quality star-time with the 1600GTO. Its a beast of a mount and built with awe inspiring quality, looks positively underwhelmed with my current scope! Polar alignment, Drift alignment, Remote control via Maxim DL, Planetary imaging, Long exposures, Calibration frames and further image processing were all on the menu this time, a few of them personal firsts.
  12. May is my first chance for observing in 2014, lets see what the weather will do!

  13. Hi Sam, I was impressed by how fast the temperature stabilized! It's my first time using a cooled CCD and ambient was low anyway so that might be expected, but nice none the less. After initializing the camera the coolers had stabilized by the time the telescope had slewed to my target! Obviously I could have pushed the cooling further but when I read about the diminishing rate of returns cooling has on noise, -25C seemed like a reasonable number. My plan is to maintain the same cooling throughout the year (simplifying calibration and processing). So I'm hoping -25C will also be reachable during the hotter months (15-20C at night). It's going to be tight, especially if we have another heat wave in August, but for the rest of the year it will be easily achievable. Then there's always the option to maintain two sets of calibration files, (i.e. cold + hot) or alternatively the water-cooling add-on. The advantage of W/C would be to sustain a lower temperature throughout the year (i.e -35C), but given the low noise currently present I'd need to spend more time researching if this would be wise choice. Zak
  14. Hi Paul, I have to admit that the additional features of the RS series probably will not be immediately useful to me, however after years of reading reviews and opinions of the available CCD products, I had already made my choice for the QSI 683 series (built-in OAG, 8pos filter wheel and largest chip with 1.25" or 31mm filters were the key factors for me, combined with seemingly constant praise for the camera's build and image quality). It was only when I got to the point of ordering the camera I noticed the RS range, and after comparing the features and discussing with the sales staff it seemed to me like a more future-proof investment, as it would still perform all the functions I needed, offer the potential and flexibility for other applications and *could* be easier to re-sell if I ever wanted to due to a wider range of potential buyers. By the way, I've just noticed that QSI now offer a 9mp version with the latest Sony CCD. 70% peak sensitivity, so much for my future proof theory! Ah, such is life in this hobby of ours... Zak
  15. Hi All, I recently purchased this camera based primarily on the company's solid reputation in this and other forums, however I had noticed that the new RS line was available with some additional features that I admit probably won’t be immediately useful (at least for amateur astronomers). After including in my order the optional 8 position CFW with IGP port (QSI's Integrated Guider Port, a built-in OAG), it effectively becomes a 683-wsg8 with the only exception as far as I know that the camera comes with a fused-quartz window protecting the CCD. Additionally I took the wider nose-piece and the Canon lens adapter. Unfortunately due my limited time I was not able to try out the lens adapter. It does require the face-plate to be exchanged with the standard, non-IGP face-plate in order to reach focus, only a 5 minute job in itself but something on my to-do list next time. The reputation for QSI's quality is well deserved in my opinion; everything arriving securely packed in its own, high-quality pelican case. Within minutes I had the drivers installed and was able to control the camera and filter wheel through Maxim. I decided to leave the standard 2" nose piece on the spare face-plate (the standard, non-IGP version) and attached the slightly larger nose piece to the IGP face-plate. This is my first time using a dedicated CCD, so full-frame, low noise, high sensitivity over a wide spectrum and being able to set the temperature were all big firsts for me. I settled with -25C as the ambient was hovering around 0C, and only required approximately 35% cooler power to maintain. Being able to take re-usable darks at a specific temperature at any time proved to be a big time-saver. It was also my first time auto-guiding, and following the simple focusing procedures provided by QSI I was up and running capturing data within an hour. The weather was naturally atrocious for the following week, but managed to get around 5 clear nights throughout December. For anyone interested, my favorite images are in the album below: http://stargazerslounge.com/gallery/album/2912-december-2013/ Comments, questions and even mild criticism welcome ;-) Clear skies, Zak
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