Just putting up these old results from 1997 so I know where to find them.
Complex Power Iterations
All posts by Greg
White Vision
If you play white noise through a pair of headphones – then after a while, with a little practice, you can hear any tune you choose in full detail – it is quite astonishing.
So I wondered if you could do the same with vision. Here is a random array of dots. By staring at the image can you pull out a picture/shape of your choice?
Star Xterminated Pillars of Creation
When I downloaded Russ Croman’s “Star XTerminator” for a free trial – one of the first images I tested it on was the JWST image of the Pillars of Creation. So I have no idea why it took me several months before trying it out on the original Hubble image. Yer ‘tiz.
Sirius – The Brightest Star in the Sky
Out of all my bright, single star images, I think this one is my favourite. Sirius – the brightest star in the sky. Two-frame (vertical) mosaic with camera in landscape mode. 3 x Sky90 refractors and 3 x M26C (non-Trius) OSC CCD cameras. Each frame is 90-minutes of 2-minute subs (so that’s actually 270-minutes of actual exposure time per frame).
In Remembrance of Tony Allen
Just received some very sad news that my high-speed videographer friend Tony Allen passed away last week.
We had a fantastic day in Tony’s studio in Oxford (quite a few years ago now) taking high-speed flash (stills) shots of water-filled balloons being shot by an air pistol. The high-speed flash was triggered by the sound of the pistol firing and we used the open-flash technique to capture the shot.
On a couple of the shots when I looked at the capture on the camera screen it looked like we had the flash trigger timing wrong as the balloon was still intact. But then a closer look at the image gave the stunning result shown above. You can see the pellet to the left of the balloon is still (remarkably) contained within the intact balloon. I like to say we got the flash synchronisation spot-on for this shot – but it was in fact pure fluke.
That was a great day Tony that I shall always remember fondly.
Star Reduced Pleiades
The star reduction does a great job in bringing out the nebulosity in the Pleiades region.
The Full Extent of the California Nebula
There is a LOT more to the California nebula than you usually see in the posted images. This is 24 x 20-minute subs taken with the Canon 200mm prime lenses, ASI 2600MC Pro OSC CMOS cameras, and the Optolong L-Enhance filters. Notice the long “nose” which is usually absent on images of this one. I wonder how much more I can get out of this one by getting more subs?
3D View of DNA – EPOD for 20th January 2023
Got yesterday’s EPOD.
YOU REALLY DO NEED TO READ THIS!
At Last!!! It is Now “Out There”!!! The Solid Golden Angle
Well good old Wolfram Research came through and they have published my Solid Golden Angle in their Notebook Archives. So at least it is now “out there” with a name associated with the discovery.
https://notebookarchive.org/the-golden-solid-angle–2022-12-dtu824g/