AshigrainBlack-and-white negative · Black & white
Ilford Delta 100
Ilford's fine-grain 100 speed for pictorial work.
Ilford Delta 100 printed on Kodak 2302: fine grain and crisp detail. Original vs Ashigrain.
At a glance
- Exposure index
- 100
- Introduced
- 1992
- In production
- Process
- ILFORD ID-11 (stock)
About the film
Ilford 100 Delta Professional is a medium-speed, fine-grain panchromatic black-and-white negative rated ISO 100/21°. Ilford dates it to 1992: the company's own timeline says 100 Delta joined the range that year, after its first Delta film, which was built on core-shell crystal technology.
The same timeline later lists improved Delta Professional films. By September 2002 the film was sold as Delta 100 Professional, in a sheet published by Ilford Imaging UK at Town Lane, Mobberley. Ilford's timeline says a management buy-out in 2005 formed HARMAN technology Limited, which trades as Ilford Photo in Mobberley, Cheshire. HARMAN technology publishes the current sheet, dated November 2018, and recommends the film for pictorial and fine-art photography. It comes in 135 on acetate base, in 120 on clear acetate and as sheet film on polyester, the roll and sheet films with an anti-halation backing that clears in development.
Sources for this history
- ILFORD PHOTO History, HARMAN technology Limited
- ILFORD DELTA 100 PROFESSIONAL fact sheet (September 2002), ILFORD Imaging UK Limited
- ILFORD DELTA 100 PROFESSIONAL technical information (November 2018), HARMAN technology Limited
The look
Ilford Delta 100 Professional is a medium-speed ISO 100 panchromatic black-and-white negative with fine grain, made for pictorial and fine-art photography. It prints on Kodak B&W Print Film 2302 by default, or on a colour print film for a near-neutral image with the print's own tint.
Best for
- Fine-art landscapes
- Portraits in soft light
- Still life and detailed studies
Compare camera films
FilmSpeedGrain, RMS σD · lower means finer grainYears made
Ansco Color Negative 843Ansco Color Negative 843−2⅔ stops vs Ilford Delta 100 · grain finerEI 16−2⅔ stops.0041951
Gevacolor Negative T 6.51Gevacolor Negative T 6.51−2⅔ stops vs Ilford Delta 100 · grain the sameEI 16−2⅔ stops.0071951
Technicolor Process IITechnicolor Process II−2⅔ stops vs Ilford Delta 100 · grain coarserEI 16−2⅔ stops.0191922
Trucolor (two-colour)Trucolor (two-colour)−2⅔ stops vs Ilford Delta 100 · grain coarserEI 16−2⅔ stops.0191945
Kodak Kodachrome 25Kodak Kodachrome 25−2 stops vs Ilford Delta 100 · grain coarserEI 25−2 stops.0141974
Agfacolor Typ 432Agfacolor Typ 432−1⅔ stops vs Ilford Delta 100 · grain the sameEI 32−1⅔ stops.0071962
Kodak Aerochrome III 1443Kodak Aerochrome III 1443−1⅓ stops vs Ilford Delta 100 · grain coarserEI 40−1⅓ stops.0292001
Kodak Vision3 50DKodak Vision3 50DMade since 2011, in production · −1 stop vs Ilford Delta 100 · grain finerEI 50−1 stop.0042011–
Fujifilm Velvia 50Fujifilm Velvia 50Made since 2007, in production · −1 stop vs Ilford Delta 100 · grain coarserEI 50−1 stop.0112007–
Agfa Agfacolor Ultra 50Agfa Agfacolor Ultra 50−1 stop vs Ilford Delta 100 · grain finerEI 50−1 stop.0041995
Agfa Agfachrome RSX II 50Agfa Agfachrome RSX II 50−1 stop vs Ilford Delta 100 · grain coarserEI 50−1 stop.0111998
Fujifilm Fujichrome 64T Type IIFujifilm Fujichrome 64T Type II−⅔ stop vs Ilford Delta 100 · grain coarserEI 64−⅔ stop.0132002
Kodak Kodachrome 64Kodak Kodachrome 64Made 1974–2009 · −⅔ stop vs Ilford Delta 100 · grain coarserEI 64−⅔ stop.0161974–2009
Ilford Ortho PlusIlford Ortho PlusMade since 1997, in production · −⅓ stop vs Ilford Delta 100 · grain coarserEI 80−⅓ stop.0131997–
Kodak Ektar 100Kodak Ektar 100Made since 2008, in production · same speed vs Ilford Delta 100 · grain finerEI 100same speed.0052008–
Kodak Ektachrome 100DKodak Ektachrome 100DMade since 2018, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0132018–
Lucky Super GBR 100Lucky Super GBR 100same speed vs Ilford Delta 100 · grain finerEI 100same speed.0052001
Ferrania Solaris FG Plus 100Ferrania Solaris FG Plus 100same speed vs Ilford Delta 100 · grain finerEI 100same speed.0052002
Fujifilm Astia 100FFujifilm Astia 100FMade 2003–2012 · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0112003–12
Fujifilm Velvia 100Fujifilm Velvia 100Made since 2003, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0112003–
Kodak Ektachrome E100SKodak Ektachrome E100Ssame speed vs Ilford Delta 100 · grain coarserEI 100same speed.0151996
Agfa Agfacolor Optima II 100Agfa Agfacolor Optima II 100same speed vs Ilford Delta 100 · grain finerEI 100same speed.0051998
Agfa Agfachrome RSX II 100Agfa Agfachrome RSX II 100same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0111998
Kodak Ektachrome E100VSKodak Ektachrome E100VSsame speed vs Ilford Delta 100 · grain coarserEI 100same speed.0171998
Fujifilm Provia 100FFujifilm Provia 100FMade since 2000, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0102000–
Kodak Ektachrome 100 Plus (EPP)Kodak Ektachrome 100 Plus (EPP)same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0181988
Fujifilm FP-100CFujifilm FP-100CMade 1992–2016 · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0221992–2016
Lomography Redscale XR 50-200Lomography Redscale XR 50-200same speed vs Ilford Delta 100 · grain finerEI 100same speed.0052025
Fomapan R 100Fomapan R 100Made since 1980, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0211980–
Kodak T-Max 100Kodak T-Max 100Made since 1986, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0081986–
Agfa Agfapan APX 100Agfa Agfapan APX 100same speed vs Ilford Delta 100 · grain the sameEI 100same speed.0071998
Fomapan 100 ClassicFomapan 100 ClassicMade since 2016, in production · same speed vs Ilford Delta 100 · grain coarserEI 100same speed.0122016–
Eastman Color Negative 5247Eastman Color Negative 5247+⅓ stop vs Ilford Delta 100 · grain finerEI 125+⅓ stop.0051983
Kodak Technical PanKodak Technical Pan+⅓ stop vs Ilford Delta 100 · grain coarserEI 125+⅓ stop.0081977
Kodak Portra 160Kodak Portra 160Made since 2011, in production · +⅔ stop vs Ilford Delta 100 · grain finerEI 160+⅔ stop.0062011–
Agfa Agfacolor Portrait XPS 160Agfa Agfacolor Portrait XPS 160+⅔ stop vs Ilford Delta 100 · grain finerEI 160+⅔ stop.0061995
Kodak Vision3 200TKodak Vision3 200TMade since 2010, in production · +1 stop vs Ilford Delta 100 · grain finerEI 200+1 stop.0062010–
Kodak Verita 200DKodak Verita 200DMade since 2026, in production · +1 stop vs Ilford Delta 100 · grain finerEI 200+1 stop.0062026–
Kodak Gold 200Kodak Gold 200Made since 2007, in production · +1 stop vs Ilford Delta 100 · grain coarserEI 200+1 stop.0082007–
Lucky Super GBR 200Lucky Super GBR 200+1 stop vs Ilford Delta 100 · grain the sameEI 200+1 stop.0072001
Ferrania Solaris FG Plus 200Ferrania Solaris FG Plus 200+1 stop vs Ilford Delta 100 · grain finerEI 200+1 stop.0052002
Kodak Ektachrome E200Kodak Ektachrome E200+1 stop vs Ilford Delta 100 · grain coarserEI 200+1 stop.0181997
Agfa Agfachrome RSX II 200Agfa Agfachrome RSX II 200+1 stop vs Ilford Delta 100 · grain coarserEI 200+1 stop.0141998
Kodak Kodachrome 200Kodak Kodachrome 200+1 stop vs Ilford Delta 100 · grain coarserEI 200+1 stop.0271986
Harman Phoenix 200Harman Phoenix 200+1 stop vs Ilford Delta 100 · grain the sameEI 200+1 stop.0072023
Kodak Tri-X Reversal 7266Kodak Tri-X Reversal 7266Made since 2003, in production · +1 stop vs Ilford Delta 100 · grain coarserEI 200+1 stop.0242003–
Kodak Vision3 250DKodak Vision3 250DMade since 2009, in production · +1⅓ stops vs Ilford Delta 100 · grain finerEI 250+1⅓ stops.0062009–
Fujifilm Eterna 250Fujifilm Eterna 250+1⅓ stops vs Ilford Delta 100 · grain finerEI 250+1⅓ stops.0052006
Fujifilm Eterna 250DFujifilm Eterna 250DMade 2005–2013 · +1⅓ stops vs Ilford Delta 100 · grain finerEI 250+1⅓ stops.0052005–13
Kodak Vision 250DKodak Vision 250DMade 1997–2005 · +1⅓ stops vs Ilford Delta 100 · grain the sameEI 250+1⅓ stops.0071997–2005
Kodak Aerocolor IV 2460Kodak Aerocolor IV 2460Made since 2009, in production · +1⅓ stops vs Ilford Delta 100 · grain coarserEI 250+1⅓ stops.0132009–
Eastman Double-X 5222Eastman Double-X 5222Made since 1960, in production · +1⅓ stops vs Ilford Delta 100 · grain coarserEI 250+1⅓ stops.0131960–
Kodak Portra 400Kodak Portra 400Made since 2010, in production · +2 stops vs Ilford Delta 100 · grain the sameEI 400+2 stops.0072010–
Fujifilm Provia 400FFujifilm Provia 400F+2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0172000
Ferrania Solaris FG Plus 400Ferrania Solaris FG Plus 400+2 stops vs Ilford Delta 100 · grain finerEI 400+2 stops.0062004
Fujifilm Pro 400HFujifilm Pro 400HMade 2004–2021 · +2 stops vs Ilford Delta 100 · grain finerEI 400+2 stops.0052004–21
Kodak Ektachrome 400XKodak Ektachrome 400X+2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0371992
Fujifilm Superia X-TRA 400Fujifilm Superia X-TRA 400+2 stops vs Ilford Delta 100 · grain finerEI 400+2 stops.0052006
LomoChrome Color '92 Sun-kissedLomoChrome Color '92 Sun-kissed+2 stops vs Ilford Delta 100 · grain finerEI 400+2 stops.0052024
Kodak Tri-X 400Kodak Tri-X 400Made since 1954, in production · +2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0171954–
Kodak T-Max 400Kodak T-Max 400Made since 2007, in production · +2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0102007–
Ilford HP5 PlusIlford HP5 PlusMade since 1989, in production · +2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0161989–
Ilford Delta 400Ilford Delta 400Made since 2002, in production · +2 stops vs Ilford Delta 100 · grain coarserEI 400+2 stops.0102002–
Kodak Vision3 500TKodak Vision3 500TMade since 2007, in production · +2⅓ stops vs Ilford Delta 100 · grain the sameEI 500+2⅓ stops.0072007–
Fujifilm Eterna Vivid 500Fujifilm Eterna Vivid 500Made 2009–2013 · +2⅓ stops vs Ilford Delta 100 · grain finerEI 500+2⅓ stops.0052009–13
Kodak Vision2 500TKodak Vision2 500T+2⅓ stops vs Ilford Delta 100 · grain coarserEI 500+2⅓ stops.0092009
Fujicolor Reala 500DFujicolor Reala 500D+2⅓ stops vs Ilford Delta 100 · grain finerEI 500+2⅓ stops.0052001
Kodak Vision2 Expression 500TKodak Vision2 Expression 500T+2⅓ stops vs Ilford Delta 100 · grain coarserEI 500+2⅓ stops.0092003
Fujifilm Eterna 500Fujifilm Eterna 500Made 2004–2013 · +2⅓ stops vs Ilford Delta 100 · grain finerEI 500+2⅓ stops.0052004–13
Anscochrome D/500Anscochrome D/500+2⅓ stops vs Ilford Delta 100 · grain coarserEI 500+2⅓ stops.0381967
Eastman EXR 500TEastman EXR 500TMade 1989–1995 · +2⅓ stops vs Ilford Delta 100 · grain coarserEI 500+2⅓ stops.0081989–95
Kodak Portra 800Kodak Portra 800Made since 2000, in production · +3 stops vs Ilford Delta 100 · grain coarserEI 800+3 stops.0092000–
Ferrania Solaris FG Plus 800Ferrania Solaris FG Plus 800+3 stops vs Ilford Delta 100 · grain the sameEI 800+3 stops.0072004
Kodak Vision 800TKodak Vision 800T+3 stops vs Ilford Delta 100 · grain coarserEI 800+3 stops.0101998
Konica Centuria Super 1600Konica Centuria Super 1600+4 stops vs Ilford Delta 100 · grain the sameEI 1600+4 stops.0072002
Kodak Ektachrome P1600Kodak Ektachrome P1600+4 stops vs Ilford Delta 100 · grain coarserEI 1600+4 stops.0501999
Kodak T-Max P3200Kodak T-Max P3200Made since 1988, in production · +5 stops vs Ilford Delta 100 · grain coarserEI 3200+5 stops.0181988–
Ilford Delta 3200Ilford Delta 3200Made since 1998, in production · +5 stops vs Ilford Delta 100 · grain coarserEI 3200+5 stops.0191998–
Science & sources
A medium-speed panchromatic black-and-white negative rated at ISO 100. Its curve and spectral sensitivity are digitised from Ilford's 2002 sheet, cross-checked against the 2018 edition; the spectral shape is relative, read from a spectrogram made with 2850 K tungsten light. Ilford prints no MTF or granularity, so its sharpness and grain are proxied from Kodak T-Max 100. It prints on Kodak B&W Print Film 2302 by default.
Response curves and the evidence behind the model
Compare manufacturer data with Ashigrain’s response on the same axes. These curves show how the model is calibrated to its sources; they do not establish a match to photographed film.
Characteristic response
RMS granularity
Density variation (σD). Where the datasheet gives a single grain value, the response away from that point is an approximation.
| Channel | Density | Datasheet-based σD | Model σD |
|---|---|---|---|
| N | 0.3 | 0.004187 | 0.004071 |
| N | 0.6 | 0.005927 | 0.005764 |
| N | 1 | 0.007652 | 0.00744 |
| N | 1.5 | 0.009372 | 0.009113 |
Model limits
These images show the film model in use. Spectral response, lighting and viewing conditions include approximations. Halation, bloom, grain size, weave and flicker are not fully measured for each film. The look of real film also depends on development and print timing.
- Custom lighting spectra, camera metering and the spectral reflectance inferred from fixed-white-balance footage are assumptions used by the model, not measurements of this film.
- The source gives a daylight ISO speed but no colour balance. Daylight calibration and spectrally neutral silver density are assumptions.
- The characteristic curve uses a relative log exposure axis with no lux-second scale and no marked normal exposure; its normal-exposure point is assumed.
- The spectral sensitivity is the envelope of a wedge spectrogram made with 2850 K tungsten light, used relative to its own printed scale. The spectrogram-to-sensitivity conversion is not printed, and the 2850 K light is not divided out.
- Neither edition prints an MTF or granularity. Both are proxied from Kodak T-Max 100, the tabular-grain Kodak black-and-white negative of the same speed, so the sharpness and granularity shown are that film's, not measurements of Delta 100.
- No push curves are published; push and pull use a generic model.
- The sheet's reciprocity power law is applied above 1 s. The sheet gives no upper limit to its validity.
- The anti-halation backing is described only for roll and sheet film, not 135, so halation is off by default. Its strength, radius and bloom are not measured.
- Characteristic response outside the published exposure range is an extrapolation, not measured film data.
- In the print branch it prints on Kodak B&W Print Film 2302 by default. Black-and-white print timing is modelled.
Reciprocity: modelled from 1/10000 s to 100 s, following the datasheet's corrections for long and short exposures. Exposure time stops at the ends of that range.
Film guide: assumptions and practical choices
Sources
- Exposure index: ILFORD DELTA 100 PROFESSIONAL fact sheet, September 2002, p. 1
- Characteristic curves: ILFORD DELTA 100 PROFESSIONAL fact sheet, September 2002, p. 4
- Process: ILFORD DELTA 100 PROFESSIONAL fact sheet, September 2002, p. 4