3.0 • Records. Save a metering session, with roll, frame, notes, and the aperture and shutter you actually used. Shot black-and-white negatives can be grouped by development. • Equipment presets. Save a camera, lens, and film, and apply the EI, format, and usual filter in one tap. Aperture priority, shutter priority, and exact B times are included. • Zone map. The frozen frame is shown by zone, along with how much of the picture falls on each. • Print preview. See how the picture might print from your placement and the suggested development. • Live zone map. In normal metering, the viewfinder shows where each part of the frame falls. • Calibrate against a meter, measure a filter factor, and hear the exposure read aloud. • Filter and bellows controls are on the viewfinder. • Leave a Zone session and pick it up again.

What’s New in 2.2 • Extended highlight capture — when highlights would clip, MeterGlass briefly darkens the exposure so bright areas stay measurable (shown as E2 / E4) • Film types for Zone mode — black & white negative, color negative, and slide, each with matching latitude and preview • Metering grid — 9- or 16-cell overlay for average metering; tap a cell to use it as the reference • Spot angle options — choose 1°, 1.5°, or 3° • Clearer out-of-range readings — values beyond the sensor scale show as ≥ or ≤ • More accurate spot vs average alignment and smoother Zone freeze Thank you for using MeterGlass.

MeterGlass 2.1 • Dark mode: follow the system or switch manually — easier on the eyes in low light, and even more instrument-like • Live histogram in the viewfinder, with red warnings for blown highlights and crushed shadows • TimerGlass integration: send long-exposure shutter times to TimerGlass for reciprocity correction and timing, or open MeterGlass from TimerGlass with your film's ISO • Settings reorganized into clearer groups • Fixes: AE-L now unlocks when switching metering modes; focal length display on frozen Zone frames

MeterGlass 2.0 — built for film and large format photography • Film format system: 135, 645, 6x6, 6x7, 6x12, 6x17, 4x5, 8x10 — masked framing, in-mask metering, equivalent focal length, portrait/landscape framing • Filter factor & bellows extension compensation: yellow/orange/red/ND filters and close-up bellows draw, folded into suggested exposures automatically • Zone System log: generate a shareable metering card with your frame, readings, zone placement and development suggestions • Metering engine rebuilt: BT.709 linearization and uniform tone mapping for markedly better stop-to-stop accuracy • Spot metering tightened to a ~1.5° acceptance angle, shown live • New languages: Traditional Chinese, Japanese, German, French • Refined interface: compact viewfinder, larger readouts, ISO confirmation reminder, haptic feedback

MeterGlass is a professional light meter for film and digital photographers. • Average and spot metering: wide-angle averaging or a ~1.5° reflected spot — pinch to zoom in to ~1°, with a live acceptance-angle readout. • Zone System: sample multiple points to see scene contrast, shadow/highlight placement, and N± development suggestions. • Metering calibration: align it to a meter you trust or a gray card for dependable readings. • Full exposure info: EV, aperture/shutter pairs, exposure compensation, illuminance (lux), and color temperature. • Instrument-style UI: compact viewfinder with large, clear readouts, AE-L exposure lock, and single-shot or continuous metering.

MeterGlass 1.1 focuses on a refined Adams Zone System workflow, improved spot metering behavior, and a cleaner professional interface. Added black-and-white preview in Zone System mode Zone mode now supports freezing the scene before capturing shadow, highlight, and reference readings Improved multi-point Zone System workflow with placement, fall zones, contrast range, and N+/N- development suggestions Spot metering now holds the selected reading after tapping a point Improved viewfinder frame, exposure scale, and reading label visuals Fixed stability and localization issues