@djl@mastodon.mit.edu

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Parent @mattblaze@federate.social Open

@mattblaze@federate.social

I'm in a place with pretty reliable power (underground distribution), and I've double checked my flashlights, charged up my USB power packs, filled up some water containers, and downloaded a bunch of

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David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

@djl@mastodon.mit.edu · Jan 23, 2026

@mattblaze@federate.social "place with pretty reliable power" I take it your place doesn't look like my neigbor's place... https://pbase.com/davidjl/image/176048428

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Parent @mattblaze@federate.social Open

@mattblaze@federate.social

Severe G4-level geomagnetic and S4 solar storms in progress, so don't let any ejected coronal masses hit you if you go outside today. https://www.swpc.noaa.gov/

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David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

@djl@mastodon.mit.edu · Jan 20, 2026

@mattblaze@federate.social It's a pity Elon isn't on Mars today.

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Root @mattblaze@federate.social Open

@mattblaze@federate.social

Photo nerditry: The highest resolution current commercially available 35mm "full frame" cameras pack about 60 million pixels into the sensor, which means each photosite is a bit smaller than 4 µm. Wit

Ancestor 2 @mattblaze@federate.social Open

@mattblaze@federate.social

So maximizing sharpness becomes a fairly complex tradeoff. Assuming a sharp lens and perfect technique, steady tripod, etc, stopping down increases depth-of-field. But, past about f/8, it also reduces

Parent @mattblaze@federate.social Open

@mattblaze@federate.social

In any case, if you're shooting at apertures smaller than f/8, even with a really sharp lens, you're likely leaving pixels on the table.

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David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

David in Tokyo

@djl@mastodon.mit.edu

Retired translator hiding out under a rock in Tokyo, Japan. Interests includes photography, jazz guitar, juggling, Materials Science, Go, Japanese literature, Comp.Sci., and AI. Programming experience in Fortran, Lisp, BCPL, C, C++, Python, and assembler on IBM, CDC, DEC, and Intel architectures.

mastodon.mit.edu

@djl@mastodon.mit.edu · Nov 28, 2025

@mattblaze@federate.social I'm a fan of Cosina, the Japanese company that makes (made?) the Zeiss Loxia lenses and still makes the Voigtlander Nokton and APO lenses. A recent lens of theirs is the Nokton 75/1.5. A really sweet lens that has an aperture that goes to f/32. Now as an f/64 school fan, that seems one stop short. But f/32 on a 60MP FF sensor is seriously ugly.

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David in Tokyo

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