Dr. Jeffrey Kavanaugh πŸ‡¨πŸ‡¦'s Avatar

Dr. Jeffrey Kavanaugh πŸ‡¨πŸ‡¦

@jlkavanaugh.bsky.social

Glaciologist and Earth system scientist at the University of Alberta. Luthier, photographer, baker, and coffee maker. Two-wheeled travel enthusiast and dog companion. He/him.

6,741 Followers  |  1,347 Following  |  2,835 Posts  |  Joined: 04.07.2023  |  1.7821

Latest posts by jlkavanaugh.bsky.social on Bluesky

Great-looking truck.

Caveat emptor: β€œThe five-digit odometer shows 211k miles, although the Carfax report lists a reading in excess of 946k miles in an October 2008 entry.”

05.08.2025 00:30 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

At long last, I’ll now be able to use all of my large-format lenses on both my Toyo 45AII field camera and my Horseman L45 monorail, without swapping lensboards.

I bought this Horseman when film cameras were at rock-bottom value; I think I paid $200 for it.

04.08.2025 18:46 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Rear view of lensboard adapter, with Toyo Field lensboard in place. Prior to the modifications, the Toyo board didn’t quite fit given the tighter radius of the its raised light trap.

Rear view of lensboard adapter, with Toyo Field lensboard in place. Prior to the modifications, the Toyo board didn’t quite fit given the tighter radius of the its raised light trap.

Front view of lensboard adapter, with Toyo Field lensboard in place. Prior to the modifications, the Toyo board didn’t quite fit given the tighter radius of the its raised light trap.

Front view of lensboard adapter, with Toyo Field lensboard in place. Prior to the modifications, the Toyo board didn’t quite fit given the tighter radius of the its raised light trap.

The lensboard adapter mods are done, at least for now; at some point I’ll pick up some Testors model paint and blacken the filed areas.

04.08.2025 18:14 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I considered sending the adapter back, of course, but decided on this course of action instead. It’ll work perfectly well, at a much lower cost than the alternatives.

Plus, as they say: a bird in the hand, yada yada yada.

04.08.2025 17:53 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
(Description in main post.)

(Description in main post.)

I’m in the workshop, taking a bastard file to a beautifully machined Toyo Field-to-Horseman lensboard adapter.

Unfortunately, the radius used for the adapter’s opening was too large to accommodate the raised light trap cast into the back of the Toyo lensboards.

04.08.2025 17:53 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 1

Yes, yes it is!

03.08.2025 02:25 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

If the pirogi shop isn’t selling t-shirts, they’re missing a golden opportunity.

03.08.2025 01:38 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

It’s worth noting that absolutely love riding in the rain - though preferably in more appropriate gear, rather than kevlar-lined riding jeans and a leather+mesh jacket.

02.08.2025 22:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Water was running curb-deep on the roads, and I arrived home to a river running down the lane behind my house.

I was very glad to find my basement sump pump merrily doing its job.

02.08.2025 22:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Well, that cracking thunderstorm was a refreshing way to wrap up today’s motorcycle ride.

I wish I owned an Insta360 (or similar) camera so all y’all could see just how hard the rain was throwing down - it was like being the target of an infinite bucket brigade.

02.08.2025 22:44 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

De Anza College is awesome! I took a couple of courses there a loooooong time ago during my undergrad days.

02.08.2025 05:39 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Yes!

01.08.2025 14:36 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
Sing a Song of Song by Kenny Garrett on AppleΒ Music Song Β· 1997 Β· Duration 7:22

I don’t know how a song can so perfectly capture the promise of a sunny August morning, but Kenny Garrett’s β€œSing a Song of Song” nails it.

01.08.2025 14:35 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Congratulations!

01.08.2025 04:40 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

(Pileated)

01.08.2025 04:30 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

😍😍😍

01.08.2025 03:27 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Frame counter (top left) and shutter speed dials (top right: high speeds; front dial: low speeds) on a 1952 Leica iiif.

Frame counter (top left) and shutter speed dials (top right: high speeds; front dial: low speeds) on a 1952 Leica iiif.

My preferred mode dials:

01.08.2025 03:23 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Honestly, it must be done.

31.07.2025 22:04 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Here I'm checking the composition one last time on the ground glass of my Toyo 45AII field camera in preparation for taking an image. Before  inserting the film holder (seen here in my left hand), I'll check and re-check that all of the various knobs on the camera and tripod's ballhead tight. Failing to do so means that the camera will invariably shift as the film holder is squeezed into place, wrecking the careful composition.

This shot, taken from the north margin of Bow Glacier, included some of the Bow Glacier ice, The Onion (out of frame to the left; its low, broad peak is popular with day-hikers and non-technical hut-stayers), St. Nicholas Peak (visible here in the distance), and - of course - the dramatic clouds.

During this trip, I shot on Ilford's FP4+ (ISO 125) and HP5+ (ISO 400) panchromatic black-and-white sheet films, depending on lighting, wind conditions, and overall scene contrast. 

For most of the images, I shot through a Hoya Orange (G) filter to increase contrast in the clouds and ice (though at a penalty of 1-2/3 stops of light). I used f-stops ranging between f/22 and f/45, generally with shutter speeds of 1/60 to 1/15 s. 

I brought two Rodenstock lenses on the trip, a 90mm f/6.8 Grandagon-N and a 210mm f/5.6 Grandagon-N; these are roughly equivalent to 30mm and 70 mm lenses for 35mm (or digital full-frame) cameras. Here I'm using the 210mm lens. For this particular scene, it would've been nice to also have my 150 mm f/5.6 Nikkor-W for an alternative composition, but I'd made a last minute-decision to leave it behind to reduce total weight and bulk.

Photo credit: Paul Ribi (Yamnuska Mountain Adventures, Canmore)

Here I'm checking the composition one last time on the ground glass of my Toyo 45AII field camera in preparation for taking an image. Before inserting the film holder (seen here in my left hand), I'll check and re-check that all of the various knobs on the camera and tripod's ballhead tight. Failing to do so means that the camera will invariably shift as the film holder is squeezed into place, wrecking the careful composition. This shot, taken from the north margin of Bow Glacier, included some of the Bow Glacier ice, The Onion (out of frame to the left; its low, broad peak is popular with day-hikers and non-technical hut-stayers), St. Nicholas Peak (visible here in the distance), and - of course - the dramatic clouds. During this trip, I shot on Ilford's FP4+ (ISO 125) and HP5+ (ISO 400) panchromatic black-and-white sheet films, depending on lighting, wind conditions, and overall scene contrast. For most of the images, I shot through a Hoya Orange (G) filter to increase contrast in the clouds and ice (though at a penalty of 1-2/3 stops of light). I used f-stops ranging between f/22 and f/45, generally with shutter speeds of 1/60 to 1/15 s. I brought two Rodenstock lenses on the trip, a 90mm f/6.8 Grandagon-N and a 210mm f/5.6 Grandagon-N; these are roughly equivalent to 30mm and 70 mm lenses for 35mm (or digital full-frame) cameras. Here I'm using the 210mm lens. For this particular scene, it would've been nice to also have my 150 mm f/5.6 Nikkor-W for an alternative composition, but I'd made a last minute-decision to leave it behind to reduce total weight and bulk. Photo credit: Paul Ribi (Yamnuska Mountain Adventures, Canmore)

I was able to bring my LF camera up onto the Wapta Icefield and Bow Glacier for my recent fieldwork.

It's been nearly 20 years since I've exposed any 4x5" sheets of film - far too long! I can't wait to develop and print the small number of images I was able to capture.

(Add'l info in alt text.)

31.07.2025 22:02 β€” πŸ‘ 16    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
A classic San Francisco building with a mural painted on one side. The mural is stylized as a one-way traffic sign, pointed vertically upward with the word β€œSKY”.

A classic San Francisco building with a mural painted on one side. The mural is stylized as a one-way traffic sign, pointed vertically upward with the word β€œSKY”.

The same classic San Francisco building, showing a mural painted on a different side. The mural is stylized as a one-way traffic sign, pointed vertically downward with the word β€œGROUND”.

The same classic San Francisco building, showing a mural painted on a different side. The mural is stylized as a one-way traffic sign, pointed vertically downward with the word β€œGROUND”.

Nah; it’s a great part of The City, and great even for short breaks from talks.

A couple of decades ago, a nearby building (at corner of 3rd and Mission) had these murals painted on them; now the faces on which they were painted butt up against buildings (The Regis on one side, MOAD on the other).

31.07.2025 16:19 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Great name, too (fwiw).

31.07.2025 15:53 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks for making every morning that much better, Mark. Congratulations on your retirement!

31.07.2025 14:26 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Like everyone else in Edmonton, I’m listening to Mark Connolly wrap up his final regular appearance with CBC Edmonton AM.

I’ve been fortunate enough to join Mark and the rest of the amazing Edmonton AM crew a few times to talk about icy things. Each time was a real pleasure, and always good fun.

31.07.2025 14:26 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

When I saw Ryan’s post+photos, my first thought was β€œDrew would know what/where these are.”

My second thought was β€œthat glacier is definitely not in the Rockies.” πŸ˜‚

31.07.2025 13:11 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I hope the piano fits down there!

31.07.2025 02:15 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Oh, cool! There was definitely meaning for the birds here - but what, exactly? (Rhetorical.)

31.07.2025 01:48 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

There’s a yellow-billed species (Pica nuttallii) in California’s central valley, but here in Edmonton we get the black-billed one.

We also get a rare grey (or β€œghost”) variant of Pica hudsonia here - they’re quite striking!

(I’ll see whether I can find a photo, and will post if successful.)

31.07.2025 01:25 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I’d be much better served at this point to spend more time on the bass - it’s been too long since I’ve played it regularly.

31.07.2025 01:12 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Ah - that simplifies things! Beautiful shot of a beautiful bird.

31.07.2025 01:11 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
The Ray Brower of this corvid β€œStand By Me” adaptation.

The Ray Brower of this corvid β€œStand By Me” adaptation.

The deceased bird, which by this time had been slowly decomposing for a couple of weeks in this spot.

31.07.2025 01:10 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

@jlkavanaugh is following 20 prominent accounts