Flash Photography Adviser vs FlashFlashApp

The Flash Photography Adviser app automatically proposes balanced settings, and subsequently supports changing these settings to achieve a new equilibrium, for: - Flash Coverage (Zoom), - Flash Output (Power Level), - Flashgun-to-Subject Distance, - Camera ISO, - Camera Aperture, assuming a shutter speed that is at or below the camera's maximum flash sync speed, and where the flashgun-to-subject distance is measured along the path that the light travels from flash to subject. Each such an equilibrium represents a correct exposure in accordance with the guide number rule. The guide number rule is a handy rule of thumb in flash photography; the rule estimates the required flash exposure value without using a light meter. This rule evolves around three concepts: - Incident light (as opposed to reflected light); an advantage for `difficult' subjects (for example bright or dark scenes). - The different lighting conditions that occur when (a) zooming your flashgun, (b) changing the flash-to-subject distance, or (c) changing the flash power - The relatively fixed exposure value for the light from the flashgun under these conditions What the rule does NOT prescribe are the actual flashgun and related camera settings (aperture, ISO, flash power, flash zoom, flash-to-subject distance) that you can use, as long as the combination of manual flashgun and camera settings lead to an equivalent exposure value as specified by the rule. Often, there are many of such equilibria. The Flash Adviser will assist in finding these equilibria by indicating how to achieve balance (the deviation as well as the direction), and indicating when balance is achieved. For this, the app indicates the resulting overall exposure value in stops RELATIVE to the rule for a selected lighting condition. Also, in the balancing process, you can choose to balance to a flash exposure compensation value rather than balancing to the zero value. For instance, you can use this feature for compensating for specific light modifiers (e.g., a shoot-through umbrella, a softbox) or to achieve balance between flash light ambient light. In this convenient app you can define and store your own flashgun(s). The app estimates the required exposure value based on the (zoom-value dependent) guide numbers of the flashgun. These guide number values can often be found in the specifications section in the User Guide of your flashgun, and can be stored in the app when defining your flashgun. The app can also be used as a `training device', where you first guess the required combination of settings for balance, and subsequently check these with the app. Further characteristics: - No in-app purchases - No account, no login - No advertisements

Know your flash settings before you shoot — not after three test frames. FlashFlash is a manual flash calculator built on the Guide Number method. It solves in both directions: POWER CALCULATOR Set your aperture. FlashFlash tells you exactly what power fraction to dial in — 1/4, 1/16, whatever the shot needs. APERTURE RECOMMENDER Set your power level. FlashFlash tells you exactly which f-stop to use. Battery-constrained, locked into a specific power level, planning a shot before you arrive — this is the tab for it. No test shots. No chimping. Enter your settings, read the answer, nail the exposure. WHAT YOU ENTER · Guide Number — type it manually or pick from 100+ built-in presets (Godox, Canon, Nikon, Sony, Profoto, Elinchrom, and more) · ISO · Aperture or power level — depending which tab you're on · Flash-to-subject distance · Flash zoom from 24 mm to 200 mm · Filter compensation for gels, diffusers, and softboxes WHAT YOU GET · The exact power fraction or f-stop, snapped to a real standard setting · Effective GN and Required GN — so you know exactly how much headroom you have · A live scene visualization: your flash, your subject, your light cone, updating in real time · A power bar showing at a glance how hard your flash is working ON CAMERA OR OFF FlashFlash always asks for flash-to-subject distance — not camera-to-subject. Because when your flash is on a stand three feet from your subject and you are eight feet away, those numbers are not the same. And that difference is everything. FULLY OFFLINE No account. No network connection. No subscription. One purchase. Your settings are saved on your device. Works anywhere you shoot.