The focal length of an optical system is a measure of how strongly the system converges or diverges light.
Without getting into an in-depth physics discussion, the focal length of a lens is an optical property of the lens.
The exact definition is:Focal length measures the distance, in millimeters, between the “nodal point” of the lens and the camera’s sensor.
FlexClip is an easy yet powerful video maker that helps you create videos for any purposes. Here are some of its key features:
* Millions of stock media choices (video clips, photos, and music).
* A clean and easy-to-use storyboard to combine multiple photos and clips.
* Flexible video editing tools: trim, split, text, voice over, music, custom watermark, etc.
* HD video export: 480P, 720P, 1080P.
Aider enables developers to interactively generate, modify, and test code by leveraging both cloud-hosted and local LLMs directly from the terminal or within an IDE. Key capabilities include comprehensive codebase mapping, support for over 100 programming languages, automated git commit messages, voice-to-code interactions, and built-in linting and testing workflows. Installation is straightforward via pip or uv, and while the tool itself has no licensing cost, actual usage costs stem from the underlying LLM APIs, which are billed separately by providers like OpenAI or Anthropic.
Key Features
Cloud & Local LLM Support Connect to most major LLM providers out of the box, or run models locally for privacy and cost control aider.chat.
Codebase Mapping Automatically indexes all project files so that even large repositories can be edited contextually aider.chat.
100+ Language Support Works with Python, JavaScript, Rust, Ruby, Go, C++, PHP, HTML, CSS, and dozens more aider.chat.
Git Integration Generates sensible commit messages and automates diffs/undo operations through familiar git tooling aider.chat.
Voice-to-Code Speak commands to Aider to request features, tests, or fixes without typing aider.chat.
Images & Web Pages Attach screenshots, diagrams, or documentation URLs to provide visual context for edits aider.chat.
Linting & Testing Runs lint and test suites automatically after each change, and can fix issues it detects
Andrei Tarkovsky (1932-1986) firmly positioned himself as the finest Soviet director of the post-War period.
Ingmar Bergman went so far as to say, “Tarkovsky for me is the greatest [director], the one who invented a new language, true to the nature of film, as it captures life as a reflection, life as a dream.”
And Akira Kurosawa acknowledged his influence too, adding, “I love all of Tarkovsky’s films. I love his personality and all his works. Every cut from his films is a marvelous image in itself.”
