After editing photos for most of the morning, I decided to head out and do a little geocaching. My first find was a puzzle cache in the Experimental Farm that I had solved a while ago but hadn’t gotten around to finding. While there, I heard rumblings of thunder in the clouds to the north and the rain started just as I made it back to the car. (more…)
Archive for August 2016
I’m still playing with the 500mm lens I wrote about a few days ago and took these from my balcony this evening:
And with a bit of luck, I was able to capture Saturn, too:
Saturn required a bit of processing to remove the sensor noise and clean things up a bit. But, I’m still very impressed that you can make out the planet and the gaps of the rings around it.
I’m thinking about buying a Tamron SP 500mm lens from a friend, so he’s let me borrow it for a few days to try it out. It’s a manual focus lens and appears to be a fixed aperture (or I need to RTFM), so shutter speed and ISO speed are the things you play with to get the right exposure.
I set up my tripod on the balcony and aimed it at the moon. Other than cropping and some light processing using Lightroom Mobile on my iPhone, these are pretty impressive.
One of the appealing things about the lens is that it’s roughly the same length as my 18-200mm at its shortest length. The lens is more like a little telescope than a traditional telephoto lens because it has a configuration of glass and mirrors that’s used in compound telescopes, aka a catadioptric lens.
The bokeh (the blur of things outside the in-focus range) is pretty cool. Instead of the traditional “dots” you end up with “rings”.