Thursday, 13 January 2011

Correction corrected

This is becoming tedious.
Just the facts for the final explanation of the image.
Focal length 11mm. Exposure 60 seconds.

Conclusion: star trails caused by camera slipping 2 to 3 degrees.

The correction in the previous post is itself wrong. No deep zoom just a light zoom. So the over long trails must be a result of the camera/tripod slipping slowly during the exposure creating star trails approximately 10 times longer than they should be. The only other theoretically possible way to get longer trails would be if the exposure was commensurately longer. It wasn't.

So that is it. I may start proper blogging at some point. Would be advisable to not hold your breath in anticipation though. The events chronicled in these three brief posts should give any reader passing by a clue to my competence.

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Tuesday, 21 December 2010

Correction

Damn but I'm an idiot. The photograph in last weeks entry is not what I thought it was but is simply star trails. I was fooled because I believed I was taking a fairly wide field of view. At the zoom setting I thought I was on and exposure time star trails would be tiny at most 1/10 th the size of the "meteors".

However I was skeptical of the photograph particularly the absence of any stubby star trails. So I am forced to the conclusion that I must have accidentally zoomed right in to an area of very few moons and captured a load of star trails. The exposure time is certainly correct. The zoom control is adjacent to the shutter button. QED.

Not for nothing do I call myself Nogbert online.

Tuesday, 14 December 2010

Geminids Photograph





Taken with a bridge type camera at 4:16 UT 14th December 2010 from Devon, England.
Exposure time one minute.
The field of view is very approx. 10 degrees.

I saw four with the naked eye and was frankly surprised at how many more are visible fading into the background noise. Before fiddling around with the photograph the four naked eye meteors and a few very small trailed ones were visible against an inky black noise free sky. Even more severe processing reveals the presence of many more faint trails. You can get a sense of this from the above picture.

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Wednesday, 14 April 2010

Hello world

Old Noggers created this blog in September 08, reckon its about time the lazy bastard posted something. Expect next post in 2012, just before the much anticipated end of the world.