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The Canon 700D wouldn't come to focus in my XX12GT dob, so I did the usual thing and shortened the struts. Well, actually the struts are still the same length, but I found the connection plate had enough surface area to allow me to drill a second set of attachment holes 35mm lower on the plate thus effectively shortened the focal length when I used those new holes.
Worked a treat and out the backyard in my Brisbane Australia home, I was treated to the best live video feed I've seen from my scope. My other OTA, my old faithful 200p newtonian, has an eFocuser but just hasn't got the fine ratio like the XX12 OTA's dual speed. I need to invest in a new two speed focuser for the 200p.
Anyway, live HD desktop video link below ... as per another post with video link, I waffle a bit so use the Youtube settings cog to set (a) twice normal speed so the video is only 8mins instead of 16; (b) set 720p HD; and (c) go full screen.
I was very happy I took the trouble to do the mod to enable the Canon to reach focus and thus do liveview. Can't wait to do a bit of outreach at my clubs next astro night.
Hope you enjoy the about 320x mag view.
Don't post much on here, but enjoy the reads! Thought I'd make you all envious of Aussie country skies! Live in suburban Brisbane which is red zone, but a couple of months ago I was at a townhouse complex in a "dark green" LP zoned township. Green zzone but surrounding areas were pitch black being in central queensland australia. Amazing what you can do with your scope pointing at dark skies. The link below is to a 16 minute live HD desktop capture so use the YouTube settings cog to (a) speed up to 2x normal speed so its only 8 minutes long; (b) set the highest quality setting of 720p; (c) watch in full screen mode.
All were a single frame iso800 sixty second shot on each galaxy. Zero stacking. Zero post processing ... it's a live desktop capture of the laptops screen. The 16 minutes includes me selecting targets, putting them into the hand control, the mount slewing to those targets, and also the shot time. The red "vignetting" patch is the townhouse complexes security lighting bouncing off the Newts tube (no LP shield) and also cos I used Toasters Expand Grad at 6 where I normally use only 3. But it's EAA not AP so I don't mind those sorts of aberations. Having said its EAA, well normally I shoot an object then spend the next 10 minutes looking up its details on SkySafari and marvelling at its stats and science. You'll glimpse a whole bunch of previous shots in the file list in the video which I'd gone to in the evening. But, I had a few minutes left before packing it in for the evening so grabbed the desktop capture so I could recall those wonderful skies in the future by re-watching the video, so I simply moved from object to object in very quick succession.
Makes one want to retire somewhere with dark skies nearby!
Used were full spectrum modded Canon 650d, HEQ5 Pro with Rowan belt drive, Skywatcher 200p f/5 Newtonian, bootcamped Macbook Pro (2009 model) running Canon EOS Utilities to control the camera lodging S1 fine Jpegs into Astrotoasters monitor folder. ShareX used to capture the desktop video.
Hyperstar Imaging Setup - Celestron 8 SCT, Hyperstar Lens, Starlight Xpress H9C, Starizona Electronic FocusserBy vincentnm
Will show working demonstration in my observatory.
A full hyperstar imaging setup:
1) Celestron 8 OTA (New retail price: £950)
2) Hyperstar V3 lens (New retail price: £990)
3) Starizona micro focusser with electronic control (New retail price: £600)
4) Starlight Xpress H9C one shot colour CCD camera (New retail price: £1700)
Used, but in 100% working condition. New kit will cost upwards of £4240. I am offering at £2000.
Please see astro images taken using this setup.
Collection only please from South London, postcode BR3. Please contact via email so that we can exchange contact numbers and arrange a demo before purchase.
Will show working demonstration in my observatory.
I am considering moving into EAA, and the SX UltraStar C looks very appealling in combination with Paul's Starlight Live software, however ideally I want to keep hardware other than 'of an optical nature' down to a minimum. My scope is controlled entirely from my iPad or iPhone and ideally I would like to control all other elements of an observing session from a single device including image acquisition, was curious as to whether any thought had been put towards connecting iOS devices to imaging hardware. The most obvious initial hurdle that I can see is the lack of USB connectivity, perhaps Wifi miight be a possibility? Of course camera manufacturers would have to build in the necessary Wifi interface (if they have not already done so). I apologise in advance if what I am suggesting is totally impractical, or naive, I am viewing this from a pure layman's perspective.
I suppose this whole topic should ideally be targeted at Apple, however I was curious to see what people think about the concept in general, and how this might be achieved. I suspect as well that apple would come back with a rather flat NO on the grounds that there would be insufficient profit in the concept for them :-)
Let's face it, one of the nice things about EAA is that you don't have to go through hours and hours of data processing afterwards: you already have some really nice screenshots safely saved.
However, on those rare (ahem) cloudy nights, you might as well review the data you collected and see if there's more to be teased out.
I had a good evening of EAA on 2017-04-02, bagging (with Quattro 8 CF, HEQ-5 Pro, and Ultrastar, as usual, until the Hyperstar materialises):
M101 (again) 22 x 1m NGC4631 The Whale (again) 20 x 1m Comet 41P (timelapse on a separate thread) 10 x 1m M3, 10 x 1m Two-thirds of the Leo Triplet (FOV not big enough!) 9 x 1m M104 Sombrero, 15 x 1m plus a tiny bit of the Elephant's Trunk nebula, 5 x 1m (too poor to show) So I've done my best with reprocessing the FITS files, saved by Starlight Live, and done a bit of gentle processing (stretches, backgound levels, contrast enhancement, nothing fancy really) to see how the results might compare with the original screen captures. I'm certainly no processing expert. Some side-by-side comparisons below for your interest (hopefully.)
I think that in all cases the results are a tiny bit better, but really it goes to show just how amazing all the work that goes on behind the scenes in Starlight Live really is!