Orion Nebula


Nikon D90, 105mm

The nebula in Orion's sword.

Clouds willing, I'll try it tonight with a bigger lens.

Update:
Funny thing about stars and big lenses... there's this thing called the '500 rule', which is a rough rule of thumb that says the maximum exposure length you'll be able to get without showing star 'trails' is 500/focal_length (on a 35mm camera). So, that 105mm lens is good for about 5". But my big ol 300mm is only good for about 1.5". And that's not enough time to get much light so the nebula just comes out like a little fuzzy star. On the other hand, a little 50mm is good for 10 seconds (much more if it's a fast 50mm). But 50mm isn't going to get much detail in small objects.

Hmmm... more research needed.

2 thoughts on “Orion Nebula

    1. cleek Post author

      ooh. that looks nice.

      ever since we moved out to the woods, Mrs has been telling me i can get a telescope. but i haven’t been able to figure them out enough to make a decision.

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