Testing the startracker

After shooting the comet last night, I did a quick test of the iOptron startracker by pointing at Orion and taking both tracked and untracked frames at 70mm focal length. The exposure was 30s at f/4, ISO 3200.

Orion

As was already clear from the comet image, it does what it says on the box and tracks the stars! I didn’t spend very long getting an accurate alignment to the pole (in the dark and cold my motivation for fiddly tasks is reduced), but out to 200mm focal length and 1 minute exposures it seems rough alignment is good enough. The lower panels show a close-up of the Orion Nebula – it’s not the Hubble Space Telescope but I’m actually pretty amazed at the amount of color you can see with such a quick effort.

Comet Lovejoy

Comet Lovejoy

First clear day this week, so I drove part-way up Flagstaff Mountain to see if the comet was visible. That close to Boulder the sky is still not all that dark, but a quick frame at 70mm in the general direction of Orion and the Pleiades quickly located it. I could just about see it with the naked eye once I knew where to look. This is a slight crop from the best frame, shot at 200mm (f/4, 60s, ISO 1600) using the iOptron Skytracker. Going any deeper led to diminishing returns. There’s not much by way of a tail to see, but the bright green color is pretty cool!

Thanksgiving in Prague

A couple of great days in Prague, whose old city, castle and restaurants proved to be a delight. We stayed at the Unitas hotel, which was excellent and surprisingly inexpensive. I went light photographically with the Sony RX100 II and that did not disappoint either; I continue to be impressed by the dynamic range you can pull out of the raw files (see for example the cathedral interior below). My sole gripe continues to be the lack of a viewfinder (get the mark three version for that reason alone) but in the absence of sun composing on the LCD wasn’t as painful as normal.

Charles Bridge at night, Prague

Charles Bridge, Prague

Street performers in Prague

Street performers in the main square

Prague at night

Where the gulls go to roost

St Vitus Cathedral Prague

St Vitus cathedral

prague_elevator

The Escher-like interior of the town hall tower

Onion Creek hike, Moab

If you’ve hiked the popular (and excellent) Fisher Towers trail, off Highway 128 near Moab, you may have wondered where the canyons that descend steeply to the right of the trail go. The answer is that they’re tributaries of Onion Creek, which can be explored along with its side canyons for the better part of a day. Onion Creek is definitely one of the lesser-known hikes in the Moab area (hiking on a lovely Sunday in November, we saw no other hikers), but it has plenty going for it – some interesting narrow sections, solitude, and great views of the towering walls of the Fisher Towers. Dogs are allowed too, unlike on most of the more popular Moab hikes.

The hike starts from the Onion Creek road, which is clearly signed off Highway 128 a short distance south (toward Moab) of the Fisher Towers turn off. To make things easy, zero your odometer on leaving the pavement; it’s 3.0-3.2 miles from the turn off to the point where the hike starts. When we did this hike the dirt road was in great shape, but be aware that it fords the creek multiple times. In November this was no problem at all for my small SUV, and perfectly fine for a compact car, but things might be different if there had been heavy rain or runoff recently. You might want to pick a different hike if you drive a treasured BMW. The hike starts where the Narrows of Onion Creek begin, just before the road climbs quite steeply above the creek on the left-hand-side. Parking is quite limited – there’s space for maybe 3 or 4 vehicles and no marked trail head.

onion_creek_main1280

Hiking the Onion Creek Narrows, in the main canyon

The first mile of the hike follows Onion Creek through the narrows. This is not one of Utah’s jaw dropping canyons, but it’s pleasant and scenic hiking up along the stream. In November the water was only a few inches deep, and the creek eminently leap-able, so it was easy hiking throughout the narrows. The road parallels the creek – at one point crossing it on a small bridge high above – but apart from a few ATVs we heard little traffic. At the end of the narrows the road descends again to the water, and for a really short hike you could be picked up there.

onion_creek_narrows1280

Short section of narrows in the second side canyon

To extend the hike you can either continue up canyon (we didn’t try that), or start investigating the side canyons that lead off to the left toward the Fisher Towers. The side canyons are to be found immediately before the road crossing, and are obvious on the ground. The first can be explored for only a short distance before it dead ends in a substantial pour off that is well beyond the ability of non-climbers to ascend. The second is more inviting. There’s one obstacle a moderate distance in which requires a bit of scrambling (we found a rope here, though it wasn’t essential), but once that’s surmounted the canyon can be hiked for quite some distance upstream. Various side-side-canyons appear, and you can take your pick which way to go. We took another left at the first of these junctions, and proceeded on past a couple more before reaching a spot where more substantial scrambling would have been needed. Retracing our steps from there, we were back at the car after maybe three hours of hiking. But there were plenty more branches we didn’t explore, and it would be easy to spend a half day or more seeing it all.

onion_creek_tributary1280

Looking toward the Fisher towers from the canyons off Onion Creek

Highly recommended!

Lake District

A flying visit – literally – to the Lake District for a weekend exploring the backroads near Keswick and west of Ambleside. This was my first visit to England’s most celebrated national park in something like 30 years, and it was far more beautiful than I remembered. You need a hardy complexion to hike in the Lakes this late in the season, but the intermittent rain, wind and sunny spells made for fun driving and photography. I’d highly recommend the drive over Wrynose and Hardknot passes, which is truly spectacular

Striking out with the Orionids

The Orionid meteor shower last night was predicted to yield 20 or more meteors per hour. That was probably right – I must have seen about that many from the not-so-dark shore of the Boulder reservoir – but they were all way too faint to make an interesting image. I made the best of it with a vertical stitch of trailed stars. Going more than 90 degrees above the horizon makes for some weird looking effects even with a spherical projection!

Boulder reservoir stars