Focusing stars can be quite the chore with the Canon EF-S 18-55mm, especially if you don’t know what a focused star looks like! Do you know what a focused star looks like? Come on! Let’s take a gander!
Focus On The Stellar Spheres
When I first started aiming my camera at the night sky, I didn’t exactly know what a focused star looked like. I mean, I thought I knew, but nope. Wrong. The camera’s viewfinder is not the best tool to use, when it comes to focusing stars. Why? Because it’s too dim. Most stars will not shine through the viewfinder, but I previously explored this topic, so read about it—here.
If you have been straining your eyes, chances are, you’re not achieving a katana sharp focus.
First things first: let’s take a quick look at a properly focused star image.
Do you recognize this asterisk? I’ll just tell you, okay? I’m running out of time and I just rolled out of bed. Yeah. What was I saying? Right—it’s the Big Dipper. A finely focused masterpiece. Look at those stellar points of light! I’m amazed at myself. Just kidding. Kind of.
Now…let’s take a look at a slightly unfocused image, shall we?
Whoa…what happened? You notice the difference, right? This is what happens when you try to eyeball the focus.
Feel free to read more about the technicalities of focusing—here.
But, you know what? I bet we could do better…or…worse. I’ll let you decide.
Ummm, well, obviously something went wrong. Horribly wrong. Did Helen Keller focus this image? I bet she did, didn’t she? Don’t hate me. Please.
I can’t think of anything clever to write.
See? Now you have no excuses! You know exactly what a focused image looks like. Don’t try to eyeball the viewfinder! Truth be told—it’s not always necessary to achieve a pin-point focus. Bloated stars show more color, so, in a strange way, a slightly unfocused image might be visually viable, depending on the context of the situation.
How To Achieve Proper Focus
Don’t try to eyeball the focus, okay? Here’s what you should do:
Locate a bright star (or planet)
Turn on camera’s live-view
Center bright star (or planet) within the LCD screen
Magnify image 5x—focus
Magnify image 10x—focus.
** Canon EF-S 18-55mm Lens Specs **
Focal Length: 18-55mm
Aperture: Maximum f/3.5-f/5.6
Angle of View: 74° 20′ – 27° 50′
Filter Thread: 58mm
Price: $199.99 (new)
More Stats Can Be Found—Here
Purchase This Lens—Here