May 5, 2026
newAdded aberration control variable support for lenses with separate soft-focus rings
lensAdded Canon EF 40mm f/2.8, 100mm f/2.8 L Macro IS USM, Minolta Rokkor MD 45mm f/2, Rokkor MD 50mm f/1.4, and Varisoft 85mm f/2.8
May 4, 2026
improvedExpanded Sellmeier coverage for moldable Ohara glasses and Hoya TAFD40
improvedExpanded the glass catalog to 111 verified entries with priority ED and high-index glasses
improvedConducted glass audit across an additional five lens files, improved SD estimates for Nikkor Z 24-70mm f/4 S
lensAdded Panasonic S 35mm f/1.8, S Pro 50mm f/1.4, and Pentax FA 31mm f/1.8 AL Limited
lensAdded Sigma 50mm f/1.4 DG DN Art, Sigma 30mm f/2.8 for DP2 Merrill, and Vivitar Series 1 70-210mm f/2.8-4
May 3, 2026
lensAdded Sony E 24mm f/1.8 ZA, FE 35mm f/1.8 ZA, and FE 55mm f/1.8 ZA
May 2, 2026
lensAdded Sony FE 85mm f/1.4 GM II and FE 135mm f/1.8 GM
May 1, 2026
articleAdded beginner primers on cardinal points (F, H, N) and lens dimensions (EFL, BFD, FFD, hiatus, total track)
lensAdded Sigma 35mm f/1.4 DG DN Art and 85mm f/1.4 DG DN Art
improvedExpanded Sellmeier glass catalog from 65 to 92 entries, covering all Ohara and Schott glasses with 2+ element occurrences — more lenses now use full Sellmeier chromatic dispersion
Apr 30, 2026
improvedExpanded glass catalog to 53 vendor-verified Sellmeier entries (adding 15 Ohara dense-flint, ED, crown, and lanthanum glasses) and corrected 50+ glass misidentifications across 25 lens files — 696 surfaces now use full Sellmeier dispersion, up from 564
lensAdded Canon FD 50mm f/1.2, and lenses for the Nikon 35Ti, Sigma DP2X, and DP3 Merrill compact cameras
Apr 29, 2026
articleAdded From Achromat to APO: Chromatic Correction, Optical Glass, and the Evolution of Color-Corrected Lenses
newAdded cardinal element and first-order distance overlays to lens diagrams
lensAdded Carl Zeiss Jena Tessar 50mm f/3.5, Carl Zeiss Oberkochen Tessar 50mm f/2.8, and Sony FE 90mm f/2.8 Macro G OSS
Apr 28, 2026
improvedImproved chromatic ray tracing with ray-density controls, off-axis color fans, and LCA readouts for clipped marginal rays
newAdded basic tilt and shift controls for supported Nikon perspective-control lenses
lensAdded Fujifilm Fujinon XF 18mm f/2 R and XF 23mm f/1.4 R and Carl Zeiss Olympa-Sonnar 180mm f/2.8 and Pro-Tessar 35mm f/3.2
Apr 27, 2026
lensAdded three Olympus OM lenses: Zuiko Auto-W 21mm f/2, Auto-Macro 50mm f/2, and Auto-Macro 90mm f/2 and Nikon Nikkor-S Auto 50mm f/1.4
Apr 26, 2026
improvedSplit Carl Zeiss into separate Jena and Oberkochen maker pages reflecting the postwar division
improvedAdded maker pages for Konica, Minolta, Pentax, Schneider Kreuznach, Sigma, and Sony
lensAdded three Carl Zeiss lenses: Contarex Planar 55mm f/1.4, Jena Pancolar 50mm f/2, and Planar T* 50mm f/1.4
lensAdded Olympus Zuiko Auto-T 85mm f/2 with floating rear-group focusing
newAdded shareable URLs for selected elements, overlays (glass map, LCA, Petzval), bokeh preview, and analysis tabs
Apr 25, 2026
fixImproves accuracy of Canon RF and EF lens diagrams
newAdded aspheric deviation inspector: compare any aspheric surface to its spherical equivalent with zoom, exaggeration, and click-to-measure Δsag
lensAdded three Nikon Perspective Control lenses: PC NIKKOR 19mm f/4E ED, PC NIKKOR 24mm f/3.5D ED, and PC NIKKOR 45mm f/2.8D ED
Apr 24, 2026
improvedAdded an Olympus maker page with company history
lensAdded three Olympus fast normals: Zuiko 50mm f/1.2, 50mm f/1.4, and 55mm f/1.2
Apr 23, 2026
improvedImproved slider performance — analysis tabs and bokeh now update only after dragging stops
lensAdded Nikon AF-S 24-70mm f/2.8E ED VR, Nikon AF-S 70-200mm f/2.8E FL ED VR, and Nikon AF-S 80-400mm f/4.5-5.6E ED VR
lensAdded Canon RF 24-105mm f/2.8 L, Zeiss Biogon 21mm, and Distagon 35mm
Apr 22, 2026
lensAdded Canon RF f/1.2 primes and Voigtländer Nokton 35mm f/1.2
Apr 21, 2026
articleAdded Pupil Geometry article series covering entrance pupil, exit pupil, telecentricity, and more
improvedImproved element outline rendering, added a 10% boundary-gap clearance margin, and audited production semi-diameters
fixFixed Canon RF 24-105mm f/4 L close-focus behavior
lensAdded Canon RF 24-105mm f/4 L, Nikon Z 40mm f/2, and two Ricoh GR lenses
Apr 20, 2026
lensAdded Canon EF 50mm f/1.0L USM and Canon RF 85mm f/2 Macro IS STM
Apr 19, 2026
lensAdded Fujifilm XF 35mm f/1.4 R and XF 60mm f/2.4 R Macro
Apr 18, 2026
improvedImproved entrance and exit pupil overlay and button readability
lensAdded Leica Elmarit-R 28mm f/2.8 and Leica Elmarit 90mm f/2.8
Apr 17, 2026
newAdded Pupils analysis tab showing entrance and exit pupil position shift across the field
newAdded entrance and exit pupil overlay toggle to the diagram controls
lensAdded Canon RF 24-50mm f/4-6.3 IS STM, Nikon L35AF 35mm f/2.8, Nikon Nikkor Z 24-50mm f/4-6.3, and Nikon Nikkor Z 35mm f/1.2 S
Apr 16, 2026
improvedImproved bokeh, spherical aberration, and coma analysis accuracy and displays
improvedNew logo and social media card
lensAdded Fujifilm XF 16-55mm f/2.8 R LM WR, XF 16-80mm f/2.8 R OIS WR, XF 50-140mm f/2.8 R LM OIS WR, and XF 200mm f/2 R LM OIS WR
Apr 15, 2026
fixFixed semi-diameter shaping and rear-group clearance in the Canon RF 28-70mm F2 L USM
lensAdded Canon RF 28-70mm F2 L USM, Canon RF 28-70mm f/2.8 IS STM, Canon RF 24-240mm f/4-6.3 IS USM, and Canon RF 24-70mm F2.8 L IS USM
Apr 14, 2026
articlePublished the Focusing Architectures series: a landing page, seven primers on focusing strategies, and a full monograph with a hovering table of contents
lensAdded Nikon Z 14-30mm f/4 S, 24-70mm f/4 S, and 24-200mm f/4-6.3 VR
Apr 13, 2026
lensEnabled Nikon AF-S 14-24mm f/2.8G ED and AF-S 16-35mm f/4G ED VR with accurate front group proportions
improvedImproved element rendering for wide-angle retrofocus designs with per-surface semi-diameters
improvedImproved vignetting and distortion accuracy for extreme wide-angle lenses (>40° half-field)
fixCorrected the 200-500mm optical aperture range
lensAdded two Nikon AF-S zooms: 120-300mm f/2.8E FL ED SR VR and 200-500mm f/5.6E ED VR
Apr 12, 2026
fixImproved distortion and spherical aberration accuracy near the edges of the image circle
Apr 11, 2026
lensAdded four new lenses: Canon Serenar 28mm f/3.5, Canon Serenar 35mm f/3.2, Canon Serenar 50mm f/1.8, and Canon Serenar 85mm f/1.5
Apr 10, 2026
newAdded lens library custom filters with typeable min/max ranges and maker selection
lensAdded three lenses: Nikon Nikkor-N Auto 28mm f/2, Voigtländer Nokton 50mm f/1.2 (X-mount), and Nikon 28mm f/2.8 (28Ti)
Apr 9, 2026
lensAdded five Leica lenses: Summilux 28mm f/1.7 ASPH (Q-series), APO-Summicron 43mm f/2 ASPH (Q3 43), ELCAN 50mm f/2, APO-Summicron-M 35mm f/2 ASPH, and Summicron-M 50mm f/2 V5
Apr 8, 2026
improvedImplemented uniform aspect ratio scaling — eliminates lens shape distortion from independent horizontal/vertical zoom
lensCalibrated Voigtländer Ultron 28/2 semi-diameters to Cosina's published cross-section diagram
lensAdded Vivitar Series 1 35–85mm f/2.8 VMC, Fujifilm XF 90mm f/2 R LM WR, and Fujinon XF 56mm F1.2 R
Apr 7, 2026
lensAdded Canon FD 35mm f/2 S.S.C., Nikon AI Nikkor 135mm f/2, Nikon AI Nikkor 135mm f/2.8, and Vivitar Series 1 200mm f/3.0 — four Sonnar-based and retrofocus designs
Apr 1, 2026
lensAdded CANON new FD 50mm f/1.2 and VOIGTLANDER 50mm f/1.2 for X-Mount
Mar 31, 2026
lensAdded Nikon NIKKOR Z 35mm f/1.8 S and NIKKOR-N 5cm f/1.1
Mar 30, 2026
fixCorrected field curvature direction labels and Petzval shift sign
improvedStandardized analysis terminology to parabasal/real-ray and fixed coma axis orientation
lensAdded Nikon NIKKOR Z 14-24mm f/2.8 S and Canon RF 15-35mm f/2.8 L IS USM
Mar 29, 2026
fixFixed article navigation so pages open at the top instead of preserving prior scroll
articleAdded Heliar History article
newAdded zoom and pan controls for infinite-resolution diagram inspection
Mar 28, 2026
newAdded chromatic field curvature chart with per-wavelength R/G/B focus traces
newAdded sagittal coma section with x-intercept fan chart to aberrations drawer
fixFixed center-field curvature baseline to use real traced focus instead of nominal image plane
newAdded real sagittal ray analysis across aberration views
newAdded field curvature and astigmatic difference analysis
Mar 27, 2026
improvedStrengthened SEO metadata, sitemap freshness, and social card data
lensAdded Fujifilm as a maker — XF 80mm f/2.8 Macro OIS WR and XF 50mm f/1.0 R WR
lensAdded Canon standard and telephoto zoom lenses
lensAdded Nikon AF-S Micro NIKKOR 105mm f/2.8G IF-ED
newAdded coma analysis with 2D point-cloud preview to aberrations drawer
newAdded meridional coma field footprint analysis to aberrations drawer
newSeparated distortion analysis into its own dedicated drawer tab
newAdded vignetting and relative illumination analysis tab
newAdded longitudinal spherical aberration profile chart
newIntroduced analysis drawer — slide-out panel for optical aberration analysis
newAdded spherical aberration computation engine with real-ray tracing
improvedMade analysis drawer tab rail scrollable on narrow screens
improvedRelocated analysis button to lower-left corner of lens diagram
fixFixed optical surface overlap in Canon RF lenses
fixFixed geometry validation errors in Nikon AF-S 105mm f/2.8G
fixStabilized spherical aberration real-ray chart rendering
fixFixed distortion calculation to correctly project chief ray to image plane
fixCorrected semi-diameter values across the Nikon Z lens lineup
Mar 26, 2026
newAdded support for variable-aperture zoom lenses (e.g. f/4.5–5.6)
fixFixed glass interpenetration in Nikon Z lenses at close-focus distances