A short but steep 2.2 mile loop in San Pedro Valley Park. From the parking lot go behind the toilet block and turn right to find the start of Montara Mountain Trail. After 1.2 miles winding slowly up you reach the junction with Brooks Creek Trail at a bench with views to the Pacific. Take Brooks Creek Trail down 1 mile to the parking lot, passing another bench with a view of the waterfall on the way down.
I have a 58mm ND5 filter that I bought to photograph the 2017 solar eclipse. It worked pretty well for that with my Sony RX100 V, but now I want to use it with an RX10 IV (which has the advantage of a 600mm equivalent zoom). The RX10 accepts 72mm filters and I want to try and photograph an ISS transit which is happening sooner than I can get hold of an adapter.
I figured someone must have done this before, but I can't find a file anywhere. It's a reasonably straightforward part - as the filter is smaller than the thread on the camera I just need a small cylinder which has a 72mm thread on the outside and 58mm on the inside. A step up adapter would be slightly more complicated to accommodate the larger filter size.
This makes a simple 10mm tall adapter and you would just need to change the thread sizes to make it work for pretty much any combination of camera and filter (most filter sizes use a 0.75mm pitch as shown above). The vignetting is pretty extreme with the smaller filter and the size of the adapter. For this application I don't care, I'm only using the center of the image. If it's a problem for your application then it might be worth reducing the height of the adapter, at the expense of making it harder to detach from the camera.
Here is the adapter STL file on thingiverse.
After all that, I missed the transit by a couple of seconds. I thought the clock on my phone would be accurate enough but turns out it's 5 seconds off. So memo to self for next time - shoot over a longer window, or just take a video.
If the atmosphere was the United States here's how it would break down:
Thor, Iowa is Hydrogen. Thor is the birthplace of John K. Hanson, founder of Winnebago. 179 people.
Florence, South Dakota is Krypton. 371 people.
Gainesville, Florida is Carbon Dioxide. It's ranked by the National Coalition for the Homeless as the 5th meanest city. 132,567 people.
All that adds up to around 1% of the atmosphere, mostly Argon.
If you're not listed then you are Nitrogen. Close to 80% at 254,334,562 people.
The Echo Clock has one job, and it's not great at it.
I made an animation of maximum temperature anomalies by decade from the 1850s to the 2010s.
Some surfing dolphins.
New Year's resolution: hike more again.
This is a combined hike of Back Ranch Meadows and Turtleback Point loop at China Camp State Park (around 2.7 miles total). Have never been to China Camp before, it's a beautiful park forty minutes north of San Francisco with plenty of interesting looking trails so will be back again soon.
(Hikes was my first blog, now folded into ITHCWY. Here's an old post about the blog. Since the last update I've ditched My Tracks because it got terrible and switched to Gaia GPS. I also moved from BlogEngine.net to my own custom blogging platform which is mostly better but hasn't worked well for my hike posts. I had to manually upload any KML files and also manually scrape out the coordinates for the start of the hike. Today I've automated this for my post by email system - I just need to attach a KML file to the email and it gets automatically uploaded to the blog and the start point is used to link to Google Maps, geocode the post and include an embedded map. Pretty cool. Hopefully this will inspire me to hike more and post more hikes as well.)
It turns out I'm not great at getting a monthly newsletter out. Starting with the January 2019 newsletter I've put in place a new system - I'm storing summaries of new articles when I write them and also collecting a few links that might be of interest to ITHCWY readers. These should be sent out automatically on the first of the month so I should only skip the newsletter if nothing happened. Apologies in advance if there are any teething issues with the new format.
Sent to Speaker Pelosi today:
As an American, constituent and supporter I am writing to ask you to investigate President Trump for high crimes and misdemeanors and to pass articles of impeachment in the House.
You have said that impeachment must to be bipartisan. That would certainly need to be the end result in order for the effort to succeed. It does not make sense as a precondition for starting the process, especially if as you also said impeachment should not be started or avoided for a political reason.
You have also said that impeachment must wait for the completion of the Special Counsel investigation. Any crimes revealed by the investigation would be icing on the cake. By imposing this condition you are making the case that obstruction of justice by the President is normal, that violations of campaign finance law are minor and that using the office for personal enrichment is only to be expected. The President deserves to be tried in the Senate for these charges. The future of our democracy depends on us not accepting this behavior.
Disagreements on policy and personality should be resolved by the electorate. High crimes and misdemeanors are your job. Please do it.