Archive for July, 2015

Today’s Earth Science Picture of the Day (EPOD) is the large DSS2 data mosaic I put together of the Tulip nebula region in Cygnus.

DSS2 data was downloaded (red and blue channels) and Noel Carboni’s actions were used to create an artificial green channel.  The RGB data was then further processed in Photoshop CS3 before the individual frames were stitched together using Registar.

This is EPOD number 69 – thank you Jim for continuing to publish my work 🙂

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Taken at 8:25 p.m. on 26/07/2015 this image shows a double rainbow over the New Forest Observatories – and more.

This morning I pushed up the contrast and saturation of the image to take a better, closer look at the rainbows.  I was surprised to see a bunch of blue/violet mini-bows on the inner edge of the primary bow.  Knowing nothing about rainbows I looked this up.  Found out this is what is called a SUPERNUMERARY rainbow.  Live and learn 🙂 🙂


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Last night, for the first time since I put it together, I have been able to use the 2 x Canon 200mm lenses (and M26C Trius cameras) as intended.

The whole idea with this rig was to get two horizontal frames for a very large FOV mosaic, so that the overall frame would be almost square.  The other reason for going for 2-framers with the 200mm lenses is that time-wise I would be able to do the equivalent of a single (200mm) frame with a 4-framer using the Sky 90s, and as there are 3 Sky 90s then it would almost take the same time as well – so pointless doing a single frame with a single camera on the 200mm lens.  Not so pointless with 2 lenses, but I didn’t have 2 when I was working this all out months ago.

Carrying on.  I had 3 hours of imaging time from 11:00 p.m. until 2:00 a.m. when the Crescent would transit so I managed to grab 10 x 15-minute subs on the left hand frame and 12 x 15-minute subs on the right hand frame.  A single frame measures 398 x 267 arc minutes.  Not enough time spent on this for a high quality image but at least it shows that the general principle works as expected.  Now all I need is some longer nights, some clear Moonless skies – and this kit will ROCK 🙂


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I have just assembled this DNA model that comes from Cochrane’s of Oxford.  It is extremely well thought out and the instructions for assembly are quite excellent given the complexity of the thing being put together.  When I first saw this kit I thought that it was a little expensive for what was being offered – I now think it is very good value for money indeed!

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The Licence Agreement between Laserscribe Ltd. and Parker Technology was formally terminated on 01/07/2015.

If you wish to purchase custom built high speed electronic flash equipment contact Prof. Greg Parker at Parker Technology.

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