Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

noah4x4

Members
  • Content Count

    697
  • Joined

  • Last visited

Community Reputation

591 Excellent

2 Followers

About noah4x4

  • Rank
    Proto Star

Profile Information

  • Location
    Colchester

Recent Profile Visitors

4,448 profile views
  1. Focal reducer sold to Blametechie.
  2. Prices exclude postage (would prefer a local buyer to collect, pay cash). All in good condition and full working order. I now pursue EAA from indoors, so this kit has simply become surplus to my needs. .. NOW SOLD Celestron x 6.3 Focal reducer. Boxed, with original end caps as new. £100. (this item retails new at £149). Celestron SkyPortal WiFi module (third generation - out of warranty, but works fine with SkyPortal/SkySafari/CPWI Boxed. £80 (this retails at £159). SkySync GPS £120 (retails at £175). Reason for sale, not necessary with CPWI and computer locati
  3. Gary Hawkins is a prolific live streamer and enjoys the weather to permit this. Another enthusiast is Doug from Emerald Hills Skies. His channel can be found at Emerald Hills Skies - YouTube Doug brilliantly organised the Zoom Messier Marathon that I mentioned earlier. Gary (like me) participated, also Roel (from Belgium) and Robert from UK (both SGL members) joined the fun. If you subscribe to Doug's YouTube Channel I am sure that you will hear of future live on-line events. It would be good to get a few more UK/European participants involved. I agree with Brown Dwarf, this ambitiou
  4. Unfortunately, as the weather in the UK is so unpredictable, announcing a live broadcast session is fraught with challenges. More likely than not the event might be cancelled due to cloud, hence leaving a good many potential viewers disappointed. It is far more likely that you will find ad-hoc streams from UK observers being posted on YouTube that are published after the event. However, some of our pals in the USA tend to enjoy better weather (such as in California) and hence enjoy far greater live broadcast opportunity. There are also some dedicated channels for this purpose. I think it w
  5. Much depends on camera and what purpose. Your principle cameras are high resolution, larger sensor and data hungry, which can be an issue. However, if you are capturing frames for later stacking and post processing 15M Active USB should be fine. The process might be a tad slow, but within USB tolerance. However, try live stacking extremely short duration exposures at fast frame rates, such as those possible at f/2 on HyperStar or RASA. Then output data to a 4K UHD display as I do. Like anything technical, there are limits and USB is no exception. It is not easy to predict where any partic
  6. Your first challenge will be aligning your scope and finding these planets in the narrow FOV of an ASI224mc and then tracking, them (unless you align during dark when you can see stars). A solar system alignment is possible using the Sun, but take care to use an appropriate filter. I have recently witnessed somebody capturing the bright core of M81 at a fairly bright dawn to complete a Messier Marathon. Jupiter and Saturn ought to be easier. But I suspect all that you might capture is a white disc of reflected sunlight. If any camera will succeed, the fast frame ASI224 is perhaps tje mo
  7. As I said, I could clearly see the four primary stars of the Trapezium on my 4K UHD screen, but in reducing the file from 18Mb to fit SGL they have, sadly, become lost. Roel has done a far better job as in his posted image he has succeeded as I can clearly see the four stars AND the beautiful nebulosity. No disrespect, but the other images in this thread clearly show the Trapezium and the core, but no nebulosity. They look more like the faint fuzzies you see in visual astronomy. Roel and Martin jpintly get my prize for what I think is one of the hardest challenges in EEAA. Capture Trapezi
  8. Before you think about cameras, think holistically about what you want to do... The specified optimum length of standard USB3 cable is merely 3 metres. The specified optimum length of standard USB2 cable is merely 5 metres. You might succeed over 12 metres with 'Active' cables if they have their own separate power supply. However, be prepared for failure. I wasted a tonne of money on cables that didn't work over a similar 12M distance. Your best bet might be to put a mini-computer at the scope running all your software; which is then controlled by a laptop indoors using
  9. There is nothing exception about an easy target like M42. However, most when chasing the nebulosity completely blow out the core. What I did here was reduce exposures to 8 seconds and increase Gain (108s total, Gain 400) using 8" Evolution (no wedge or guiding) with x6.3 FR and ASI294mc. With modern CMOS cameras, you have greater exposure/gain combinations and lesser exposure length, but longer total integration time is the knack. My image has lost a little detail in cropping and reducing resolution to fit SGL image limits. But on my 4K UHD graphics display the Trapezium is clearly defined. A
  10. Be ready for grief with long USB cables. The maximum recommended lengths are surprisingly short. I wasted ££££'s on active USB cables and powered hubs and still failed. Your better route is to put a mini computer at yoir scope running all your software. Then connect that to a laptop indoors using cat6 cable or WiFi. Then control the scope side computer from the laptop over Windows Remote Desktop (or similar). Cat6 will work up to 100M, whilst WiFi range will depends on your home network (I use BT Whole Home MESH extenders). But both are more reliable than USB beyond 3 to 5 metres.
  11. The problem with buying any low budget small sensor camera for EAA is you might find it challenging to get objects on screen due to the camera's narrow FOV. Much depends on mount, GoTo and tracking accuracy, but embracing small sensors is the hardest of entry routes and a recipe for frustrations if inexperienced. I suffered much frustration as a novice, and eventually I went completely the other way and bought Hyperstar to maximise my FOV, but I am not suggesting anything so radical. However lower focal ratios do assist. Frankly, I think the best camera for a novice is either an ASI294
  12. Further to my post above that offers a solution to rear end clearance on Alt- Az, but only for non-cooled cameras, I have discovered that the 105mm back focus behind the Celestron x6.3 FR is only sacrosanct in Refractors and Reflectors. An SCT achieves focus by moving the mirror and the extent of adjustment is far greater. However, a Crayford Focuser introduces unnecessary challenges with an SCT. My optical train is now OTA > FR > Celestron 2" dielectric diagonal > Camera. The diagonal has a light path of 137mm, far greater than 105mm. But I can achieve perfect focus. Runn
  13. If you use a x6.3 Focal Reducer you typically require 105mm back focus (distance between FR and camera sensor). I read earlier today that one of the Click Lock diagonals has a 112mm light path, hence too long. Most 2" diagonals are far too long. You need to check your light path. I achieve 105mm as follows and am resigned to having to embrace a different optical train if I want to pursue visual. OTA > FR > T-Adapter > Baader Varilock (or other spacers) > camera. EDIT Think I might have misunderstood. If you are referring to a click lock replacing the visual
  14. I might be throwing a spanner in the works, but are we talking about an 6" Alt-Az or is it mounted on a GEM? Ignore this post if the latter. Back focus required is 105mm after the focal reducer. I achieve that by; OTA > FR > T-Adapter > Baader Varilock > Camera. I can just achieve rear end clearance going to the Zenith on my 8" Evolution provided I am using a (short) non-cooled camera. Won't rear end clearance be a problem with a 6SE Alt-Az if you try to add a Crayford Focuser? There is a little flexibility in the 105mm, but you need to be close. I simply use my re
  15. My experience with Orion Optics UK is recent (August 2020). OOUK performed a complete service of my Celestron Evolution OTA including realignment of my corrector plate and secondary mirror holder, refurbishment of mirrors etc. What really impressed me is that without extra charge they replaced my Bob's Knobs (ghastly devices) with Allen bolts and lined my loose dust cover with felt to make it more secure. I was delighted with the results, service, speed and price. Whilst at the factory, I was shown models their own range and how they do stuff. Really impressed, indeed envious.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.