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galago commented on Photographer built a medium-format rangefinder   petapixel.com/2025/12/06/... · Posted by u/shinryuu
galago · 11 days ago
This is a viewfinder camera with scale focus. Rangefinders have a complex mechanism to measure distance which would be beyond the scope of this project. In early Leica cameras, the rangefinder and view finder were separate mechanisms on the same camera, and were combined in the Leica M series in the 1950s.
galago · 11 days ago
Oops! Correction: It is a rangefinder but uses lidar to measure the distance rather than parallax.
galago commented on Photographer built a medium-format rangefinder   petapixel.com/2025/12/06/... · Posted by u/shinryuu
galago · 11 days ago
This is a viewfinder camera with scale focus. Rangefinders have a complex mechanism to measure distance which would be beyond the scope of this project. In early Leica cameras, the rangefinder and view finder were separate mechanisms on the same camera, and were combined in the Leica M series in the 1950s.
galago commented on The Really Big One (2015)   newyorker.com/magazine/20... · Posted by u/Tomte
galago · 8 months ago
I was in a second floor bedroom in an old creaky wooden house for the "Spring Break Quake" in Salem, Oregon in 1993. The whole house rocked back and forth and I got out of bed to see if there had been an explosion. Its spooky how people expect things of relatively low probability to just be zero. I turned on a radio and the DJ had interrupted the song to explain that an earthquake had occurred. The Willamette valley has lots of brick buildings that aren't really prepared for what's going to happen.

https://en.wikipedia.org/wiki/1993_Scotts_Mills_earthquake

galago commented on Lynx is the oldest web browser still being maintained    · Posted by u/jahnu
eviks · 9 months ago
You mean unreadable on mobile due to tiny text?
galago · 9 months ago
Should we blame an old timey basic webpage for its lack of complexity or should we blame a modern browser for not accommodating the web in its most simple form?
galago commented on Blackmagic Debuts $30K 3D Camera for Capturing Video for Vision Pro   macrumors.com/2024/12/16/... · Posted by u/tosh
PaulHoule · a year ago
It has nothing on this

https://www.kandaovr.com/Obsidian-Pro

Panoramic photography for VR is on my bucket list although I have a huge list of other projects such as having a reliable camera-to-audience system for stereograms I shoot with another other camera from that company

https://www.kandaovr.com/qoocam-ego

Note there are cheap pano cameras too

https://www.kandaovr.com/qoocam-3

though my Uni has a resource center for that kind of thing and I can probably talk my way into borrowing one of the better ones.

Stereo panos can be absolutely amazing on a consumer VR headset, I've greatly enjoyed crowd scenes from Paris such as in front of the Louvre and an observation deck on the Eiffel tower.

The 3d economy more fundamentally needs some kind of photo-to-3d technology and that is going to take multiple photographs from different angles, a depth camera helps but in one shot it does not give you the pixels that are only visible on the L or the R channel in a stereogram because of obscuration.

I've got a friend who makes 3-d models using a $265 million camera

https://mastodon.social/@UP8/111915448546172624

one thing we've talked about is where to get the missing pixels that aren't in any of the photographs, it's a tougher problem for him as a scientist than it is for me because he can't make stuff up.

galago · a year ago
I have a QoocamEgo and have found it pretty disappointing even at that price point. It takes about 30 seconds to start up, chews through battery quickly, and has poor autofocus. I set focus manually by guessing and then use "sport mode" (1/120second) otherwise it will use low shutter speeds which produce motion blur handheld. Also, even though it will shoot close up items, I've found that the offset is too great for most viewing scenarios. So, I would say composing images that include subjects 3m to infinity is about the best.
galago commented on The Year of McDonald's   thefp.com/p/the-year-of-m... · Posted by u/secondary
paulpauper · a year ago
McDonald's functions as sort of public square, which is missing elsewhere in society, as the employees are to detached or inattentive to care if people are loitering too long. Same for Starbucks.
galago · a year ago
I walked by the Starbucks in my neighborood recently and there were about 30 customers inside sitting at long tables. Every single person was staring at an electronic device. Maybe that's how a public square works nowdays.
galago commented on The theft of a Churchill portrait   thewalrus.ca/churchill-po... · Posted by u/prismatic
yawpitch · a year ago
> A simple image amplified and focused by hand, through delicate rotations of plates of glass, and filtered toward a tiny mirror contained inside a camera that projected the reflection toward a viewing screen. When Karsh opened the shutter for one-tenth of a second, he exposed an eight-by-ten sheet of light-sensitive nitrocellulose Kodak film to the reflection of Winston Churchill, creating a negative that later needed to be developed in darkness.

Karsh used an 8x10” monorail camera… there were no “delicate rotations of plates of glass”, such cameras don’t use helical focusing, instead a lens with fixed optical glass is moved back and forth using linear movements of either or both of the vertical stanchions.

There also is no “tiny mirror” reflecting anything… while (a very few) 8x10” reflex cameras have been built, they require an 8x10” mirror, and in any case this wasn’t a reflex camera at all. Karsh would have set the rough focus by moving the rear stanchion sufficiently far from the front stanchion to get rough focus at that distance from the film plane with the lens he was using, then he would have achieved fine focus by viewing a ground glass plate slightly larger than the negative set in the rear stanchion, light projected directly through the lens onto that ground glass forming an image flipped both vertically and horizontally from reality (Churchill’s head would have been on the bottom and any text on the cigar would have been flipped left to right)… no mirror of any size was involved. Once focus was set a light tight film back was inserted, replacing the ground glass with a sheet of film at the same distance from the optical center of the lens, hence the same focal distance. The lens’s shutter would then have been closed, a dark slide would have lifted to allow light to strike the film, and then the exposure was ready to be taken whenever Karsh (and Winston) were ready (-ish, in the case of Winston).

Lastly all film negatives, sheet or otherwise, had to be developed in the dark… the thing that made nitrocellulose special was that it really needed to be developed and stored away from flame.

galago · a year ago
About a year ago, I had an opportunity to use an 8x10 field camera. This description is correct. I didn't have any film, so I loaded the film holder with paper and developed it under a safelight in the darkroom. This isn't a typical process though and film has very low ISO. I then contact printed through the paper. The resulting image wasn't particularly sharp. It was a fun exercise though, and I'd like to borrow the camera again. Using it is a very slow and formal process. The film is as one would expect, expensive.
galago commented on Ask HN: Any hope for removable, rechargable battery standards?    · Posted by u/candiddevmike
galago · a year ago
I photo/video lights from Neweer that use a Sony standard battery which may or may not be made by Sony. This seems to be because media creators already have these batteries/chargers. So maybe sometimes the market does give people what they want. It has to be enough to influence the puchasing decision.
galago commented on Taking my diabetes treatment into my own hands   martin.janiczek.cz/2024/0... · Posted by u/mjaniczek
supertofu · a year ago
I'm prediabetic with two T2 parents and a T2 grandparent and my primary care doctor is entirely unconcerned about it.

My lowish tech solution to delay (and hopefully prevent!) the onset of T2 is to use a glucose monitor every 2 hours, every day, and create a database of foods with my postprandial blood sugar reaponse at 1.5 and 2 hours. I also keep track of how exercise affects my blood sugar.

Over the last couple years, I have gotten great data on the foods which spike me and the foods which are neutral to my blood glucose.

A lot of foods doctors/the internet tout as "diabetic friendly" (like beans, lentils, corn in any form, brown rice, buckwheat groats, non-granny-smith apples) spike me like crazy. Other foods are totally fine (bananas, snap peas, nuts, steel cut oatmeal, fermented dairy, fish).

Having an autoimmune disorder on top of the prediabetes, I've learned that the only one who cares about my health and longevity is me. My doctors care about my inflammatory markers and nothing else.

galago · a year ago
I was diagnosed with T2 last year, and started a CGM (Freestyle Libre 3) like you did. I started off with lists of foods I could eat, but the monitor let me see actual data on what was happening. Its not very accurate, but the absolute numbers don't matter as much as seeing the actual trend effect on my own body. I never let it go over 150, ever. I can eat some legumes in moderation, but your specific body may be different. I initially took Metformin, but discontinued. My last A1C was 5.1 and and endocrinologist I was consulting with put in his notes that my diabetes is "remission." So, if you're prediabetic, keep at what you're doing. I eat very little meat, btw, so while that might work for some people, its not strictly necessary.
galago commented on In Colorado, an ambitious new highway policy is not building them   nytimes.com/2024/05/31/he... · Posted by u/lxm
akira2501 · 2 years ago
Yes, I'm aware of how one would do it, I am questioning whether that was actually done in this case or not. Further, I would question, what other places outside of your commute have you measured air pollution?

They offered it as a data point. I think it's fine form to question it.

galago · 2 years ago
The EPA Air Quality Index isn't everything, but it is a standard value displayed in a phone weather app. I'll notice in times and places when I suspect its bad. If you live outside a city in place without forest fires or other environmental issues you might not notice its there. Some people with respiratory issues monitor this stuff constantly.

u/galago

KarmaCake day695February 24, 2013View Original