The Author – Bart Busschots
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Jan
29
Tips for Photographing Stars With Basic Equipment
Filed Under Science & Astronomy, Photography on January 29, 2012 | 9 Comments
Hard-core astrophotography is very difficult, and requires quite a lot of quite expensive equipment, but, you can do surprisingly much with surprisingly little if you don’t set your expectations unrealistically high. The big problem with the night sky is that it moves. Well, strictly speaking it’s the earth that’s moving rather than the sky, but the point is, stars don’t appear to stand still. Normally when you have a subject that’s dim, you use a tripod and just leave the shutter open for as long as it takes, but since everything astronomical is always on the move, that doesn’t work! The way the pros get around this is with expensive mounts that track the movements of the heavens, opening up the possibility of long exposures. With that problem over-come the pros then run into a whole new set of problems with how noise builds up in sensors over long exposures, so they end up needing some quite advanced techniques and a lot of software and skill as well as the fancy hardware.
I don’t have any of the fancy gear, nor any of the fancy software, nor indeed, the skills needed to get good results out of the equipment I don’t have! But, I can still get a descent shot of a star field, and all I need is three things:
- A camera that will allow manual control of the aperture, shutter speed, ISO and white balance, exposure times of up to 30 seconds, and manual focusing or some form of focus lock
- a tripod
- A remote shutter release (or, as a work-around, a delayed shutter release mode)
I did also mention that you need realistic expectations, basically, what we’re aiming for here is shots of large sections of the sky. Think a nice shot of a constellation. If you have visions of detailed views of spiral galaxies in your head – get them out now – that’s for the pros with their fancy kit!
Jan
4
It’s not the Flip-flopping, it’s the Dishonesty!
Filed Under Polemics & Politics on January 4, 2012 | Leave a Comment
It’s primary time in the US, and Mitt Romney is running again, so of course you can’t drown out the chorus of pundits denigrating him for being a ‘flip-flopper’. It would appear that in the mind of much of the popular press on the west side of the Altlantic, keeping an open mind is an unforgivable crime!
Before you all think I’ve gone mad, I am NOT saying Mitt Romney is great, I’m saying the problem with him is not THAT he changes his mind, but his dishonesty about his many reversals. A good leader will be guided by his core principles, and reality. His principles should not change, but reality does, inevitably, and eternally. As reality evolves, the best avenues to peruse your principles have to evolve as well. If you want to live in a well run country you should applaud political leaders who have the courage to re-evaluate their plans and proposals as situations evolve.
Jan
3
Why Did Steve Choose Walter Isaacson?
Filed Under Computers & Tech on January 3, 2012 | 1 Comment
I finished the Steve Jobs biography by Walter Isaacson quite some time ago, but I didn’t bother to blog a review because I didn’t think I had anything to contribute to the discussion that hadn’t already been more eloquently argued by others. But, when listening to John Gruber and Dan Benjamin discuss the book on the Talk Show podcast a few weeks back, they raised a question that piqued my interest, why did Steve choose Walter Isaacson to be his authorised biographer? You have to remember that this biography did not get written because the author was really interested in Steve Jobs and begged and pleaded for cooperation, if anything, the inverse is true. In the introduction to the biography Isaacson explains that it was Steve who asked him to do the book, and that he repeatedly turned Steve down before finally giving in (to the inevitable?). Isaacson specifically mentions that Steve had cited his love of his biography of Albert Einstein as one of his reasons for wanting him as his biographer, so I figured I’d give that a read too, and see if it helped me to understand Steve’s decision to head-hunt Isaacson.