For every serious photographer — medium format, large format, technical cameras, 135, mirrorless and film, all welcome. 36 tools · 1500+ lenses · global map.
Three elements — a biconvex lens, the optical axis, a focal point. A Gaussian image-formation diagram: the geometry quietly underneath every photograph.
FEATURES · DATA · SUBSCRIPTIONS UNCHANGEDMainstream feeds compress photos to 8-bit JPG and lose gamut and shadow detail. Optaxis preserves HEIC 10-bit, Display P3 wide gamut, and 80 MB originals end-to-end — the depth your GFX, Hasselblad, or large-format scans actually captured.
Standalone calculator apps have no community; mainstream community apps have no pro calculations — planning, calculating, and sharing means hopping between 4–5 apps. Optaxis puts Scheimpflug, shift, DOF, astro, reciprocity, and darkroom — 36 tools — alongside the gallery and community.
On generic feeds your ALPA, shift, or 4×5 work disappears beneath phone street shots. Optaxis filters, rankings, and verifications all revolve around medium format, large format, technical cameras, 135, mirrorless, and film — like-minded photographers gather naturally.
A lens library that lines up Rodenstock HR, Schneider, Angenieux, Zeiss Supreme & Aatma, Cooke, Fuji GFX, Hasselblad XCD & V, Leica M / S / SL, Canon TS-E, and Laowa Shift — image circle, sensor coverage, weight, and max aperture compared side by side.
Mainstream socials strip EXIF and have nowhere for film metadata. Optaxis posts and share cards keep lens, back, stock, roll, holder, push/pull, metering, and developer recipe — plus six official brand verifications (ALPA · Cinema Lens · Leica · Hasselblad · Fujifilm · Large Format Film) and a Master badge program.
The tools page now opens with today's light laid out on a timeline — sunrise, golden hour, blue hour, the Milky Way window — each node linking straight to the tool that moment calls for.
The negative lab now works a whole roll at a time — 36 frames de-masked in one pass, then fine-tuned frame by frame on the contact sheet.
Search now has a knowledge section: tutorials and Q&A are searched together, results open as knowledge cards, and you can drop one straight into a chat.
Now 1500+ lenses and 680+ bodies — Panasonic's full M43 line, Minolta α i, Pentax K-5, Hasselblad C, plus Minox and SL66 filled in.
From Scheimpflug to astro planning, film dev to EI calibration — the full technical and film workflow. All 36 tools free right now (19 tools sign-in-free), with no paywall of any kind; even when a membership arrives, only 7 tools need a membership, and Points you earn by shooting, joining challenges and inviting friends unlock them — not a cent required.
680+ bodies in the catalog, grouped by format and mount. Community filters, rankings, and verifications all revolve around the gear you actually shoot.
Rodenstock HR · Schneider Apo Digitar · Angenieux Optimo · Zeiss Supreme & Aatma · Cooke S7/i · Fujifilm GFX · Hasselblad XCD & V-System · Leica M / S / SL · Canon TS-E · Laowa Shift · vintage large format — compared side by side.
Gallery · Map · Shooting log · Articles & news · Equipment database · Verifications · Astro & light pollution — seven modules connecting like-minded photographers worldwide.
Masonry feed · HEIC 10-bit lossless up to 80 MB / photo · filter by lens, body, or back · gear leaderboards · daily inspiration · like / bookmark / comment.
Nearby photographers and their kit · spot check-ins / bookmarks · curated routes · scheduled shoots · live spot weather · city clusters.
Gear · exposure · weather · notes · stock / roll / holder / metering / reciprocity / push-pull · cloud sync · CSV export · share cards with App Store QR.
Themed contests · community voting · in-depth articles on Scheimpflug, shift stitching, lens selection · real-time industry news.
1500+ lenses · 680+ bodies · 38 backs · 37 stocks · 250+ accessories · back vs back, body vs body, lens vs lens — sensor, megapixels, print size, image circle, weight side by side.
Six brand verifications — ALPA · Cinema Lens · Leica · Hasselblad · Fujifilm · Large Format Film — plus a Master badge program shown beside qualifying names.
88 constellations + 120 DSOs in AR · 5-D observability rating · moon phase & texture · NPF star trail rule · Milky Way visibility · global light pollution (VIIRS · Bortle).
Free to download. All 36 tools free right now, 19 tools sign-in-free. Even when a membership arrives, only 7 tools need a membership — and Points unlock them. No paywall.
Ignore the "Redeem" field on TestFlight's home screen — our beta is joined through the link itself. We do not issue redeem or invite codes.
Optaxis is distributed directly from this site and is not yet listed in the Chinese app stores. Some phones block any installer that has not been through their own store check — this is about the distribution channel, not the app.