
jtra
u/jtra

Příběh focení a něco k postupu zpracování mám ve videu tady: https://youtu.be/4jfz5Rcbt7Y
This one is of importance to anyone without huge VRAM (like all of r/LocalLLaMA):
We need mixture-of-experts where experts have some assigned area of knowledge. So when you are programming you turn off experts for history and geography unless you would need them for the task and when you are doing historic role play, you turn off the ones for programming languages. How it can be done? In training you let only one or few experts active in learning phase while working with specific type of data (history books, programming books). That way you will be sure it is the specific expert that learns this type of data.
This one is for anybody working on untrusted data that may contain prompt injec
Ahoj. Focení Měsíce je téma, které mě baví dlouhodobě. Sepsal jsem tady návod, jak ho fotit (v češtině): https://jtra.cz/stuff/essays/moon-landscape/index.cz.html
Zítra ten úplněk bude spíš menší, ale to zas tak nevadí. Mám tu i srovnání superúplňku s mikroúplňkem ve videu. Rozdíl to není velký, spíš jde o kvalitu vzduchu: https://youtu.be/x2MYjgnJtjw
Hello. I have taken some shots of Orion for a deepscape (so Orion was quite low in the sky). I used a tracker, 60MP FF camera (Sony A7RV) and Sigma 135/1.8 lens. Stars look fine on 60MP FF sensor, some exposures show slightly elongated stars, but acceptable. My main star sequence is 179x 30s tracked exposures. The exposures correspond to altitude in center of image from 15.5° to 29°.
I need to align the images as over time the view was shifting a bit due to imperfect Polar axis alignment (about 300px, 0.5° over 1h44m). I have experience with aligning stars in Sequator which works well for me though I often just align image in Sequator and merge aligned images in my own program so I am prima


![A castle, the Moon, a reflection and a duckling. What more could I ask for? [174mm] [FF]](https://jtra.cz/foto/20250807-mesic-s-bezdezem/preview/20250807204256_00662.medium.jpg)


![České středohoří - Czech Republic [100mm][FF]](https://jtra.cz/foto/20201018-trtin-a-lipska-hora/preview/20201018080320_.medium.jpg)