> ## Content Index > Fetch the complete content index at: https://www.unknowndivide.com/llms.txt > Use this file to discover other available public pages before exploring further. # Sekonic L-308X-U Flashmate: The Light Meter Worth Buying - URL: https://www.unknowndivide.com/sekonic-l-308x-u-flashmate-light-meter/ - Published: 2022-12-31T15:00:00.000Z - Updated: 2026-11-07T07:12:38.000Z - Description: A handheld light meter is the most useful accessory a film photographer can buy, and the Sekonic L-308X-U is the compact one many people choose. Here is how it works and how to use it. - Author: unknowndivide staff - Tags: Tech, Culture *Unknowndivide may earn a commission from purchases made through links in this post.* Old film cameras are wonderful, but their built in meters are often dead, inaccurate or missing entirely. A handheld light meter solves that. The Sekonic L-308X-U Flashmate is small enough for a jacket pocket, runs on one AA battery and measures both ambient light and flash. It is the meter many film photographers buy first and keep for years. ## What the Sekonic L-308X-U is The [L-308X-U Flashmate](https://sekonic.com/sekonic-l-308x-u-flashmate-light-meter/?ref=unknowndivide.com) is the current version of a long running Sekonic design. It reads incident light through a sliding white dome called a lumisphere, and reflected light through a lens with a 40 degree angle of view. Sekonic lists a metering range of EV 0 to 19.9 at ISO 100, ISO settings from 3 to 8000, and flash readings from f/1.0 to f/90.9\. A backlit LCD switches on automatically in dim light. It has three modes. Photo mode gives shutter priority or aperture priority readings for still cameras. Cine mode works in frame rates and shutter angles for film cameras. HD Cine mode suits video shooters using shutter speeds. For most film photographers, Photo mode is all you need. ## Incident vs reflected metering Camera meters measure reflected light, the light bouncing off your subject. That can be fooled by bright or dark scenes: snow reads as too bright, a black coat as too dark. Incident metering measures the light falling on the subject instead. You stand where your subject is, point the dome back toward the camera, and take a reading. Because it ignores the subject's tone, it gives consistent exposure for portraits, still life and street work in even light. The L-308X-U does both. Use the dome for people and controlled scenes, and switch to reflected mode for distant landscapes or subjects you cannot walk up to. ## Flash metering The Flashmate name comes from its flash abilities. Plug a sync cord into the PC terminal and fire the flash from the meter, or use cordless mode and trigger the flash yourself. The meter reads the burst and tells you the aperture to use. For studio portraits or small home setups with speedlights, this removes a lot of guesswork, especially with film where you cannot check a screen. ## Using it with film cameras - **Set the ISO** to match your film, or to the rated speed you plan to push or pull. - **Choose shutter priority** if you need a fast speed for handheld shots, or aperture priority for depth of field. - **Meter for the shadows** with colour negative film, which handles overexposure better than underexposure. - **Meter carefully** with slide film, which has little latitude in either direction. Write exposure notes in a pocket notebook as you shoot. A small [Moleskine Classic](https://www.unknowndivide.com/moleskine-classic-notebook-hard-cover/) and a firm pencil like the [Blackwing 602](https://www.unknowndivide.com/blackwing-602-pencil/) make a simple field log, and comparing notes with negatives is the fastest way to improve. ## Handheld meter vs phone apps Phone light meter apps are free and surprisingly decent, so why carry a dedicated meter? Speed and reliability. The L-308X-U powers on instantly, works one handed, and gives incident readings that phone apps cannot match without accessories. It does not drain your phone battery, it works in rain and cold, and its readings are consistent from day to day. For casual snapshots an app can be enough, but once you care about exposure across a whole roll, a real meter pays for itself in fewer wasted frames. It is also small enough that you stop thinking about it, which matters on long walks with an old camera. ## Who the L-308X-U suits It suits anyone shooting older mechanical cameras, medium format bodies without meters, or large format setups. It is also handy for hybrid shooters who use film and video. Photographers who want spot metering for precise zone style work may prefer a spot meter, but for everyday shooting the L-308X-U covers almost every need in a tiny body. Light meters reward slow, careful work. Pausing to read the light is a habit that improves every frame, much as a slow listen to [Truth](https://www.unknowndivide.com/drifting-in-silence-truth/) rewards attention. Keep a spare AA battery in the case, and calibrate against a camera you trust if readings seem off. ## Where to buy **Shop the Sekonic L-308X-U** [L-308X-U Flashmate at Sekonic](https://sekonic.com/sekonic-l-308x-u-flashmate-light-meter/?ref=unknowndivide.com) [Sekonic L-308X-U Flashmate Light Meter](https://www.amazon.com/dp/B079YWCZNC?tag=unknowndivi02-20&ref=unknowndivide.com) The full range of meters, including spot and cine models for when you outgrow this one, is on the [Sekonic site](https://sekonic.com/?ref=unknowndivide.com). For more film stocks, cameras and darkroom guides, explore the [Leica and film photography hub](https://www.unknowndivide.com/leica-and-film-photography/).