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Sensor sensitivity compare, ranking

Dima sensor sensitiv. ranking DxoMark ISO/mm²

Here is a way to compare Sensor Sensitivity through their Dxo-ISO Sports score
by dividing their Dxo-ISO Score by their 2 Dimensions (Area)
That was mine for AstroPhotography purpose.

Dima Sensitivity = DxoMark-ISO-Score / Sensor-Height / Sensor Width (mm)

Dima Sensor Sensitivity Ranking : DxoMark-ISO / mm²
i-lens-cameraImx-PixelTypSizeMpHighWidtDiagDxoSSiso/mm²QEMaxIR+
Pntax Q.Q100781,55BSI1/2,3124,606,157,701866,57 30sYes
can120nik340 1,85BSI1/1,7125,707,509,402606,19 15/60 
Pentax Mx-1 1,85BSI1/1,7125,707,509,402084,95 30s 
Sams.NXmini1832,40BSI1"208,8013,215,95354,6180240sYes
Sony A7 III 5,96BSIFF2424,035,943,237304,33 Bulb 
Sony A66002713,88FSIapsC2415,623,528,214974,08 Bulb 
Nikon D7500 4,20FSIapsC2015,623,528,214834,05 Bulb 
Pentax K-10944,80FSIFF3624,035,943,232803,81 Bulb 
Nikon D7200 3,90FSIapsC2415,623,528,213333,64 Bulb 
NikD600-7501285,96FSIFF2424,035,943,229533,43 Bulb 
PntaxK5(2(s))0714,78FSIapsC1615,723,628,412023,2550Bulb 
Pentax K3(II)
3,90FSIapsC2415,623,528,211613,17 Bulb 
Eos 60(0)dCan4,28MosapsC1815,022,527,08032,38 Bulb 
Nikon D2HLbc9,55MosapsC415,523,728,33520,96 Bulb 
Mamiya ZDDals9,00CcdMF2236,048,060,02450,14   
Unit µmTypinchMpmmmmmmDxoSSiso/mm²%sec.ease
Sort Table by Clicking on Headers, reload page to unsort.
Thanks to Stuart Langridge Et Al. : kryogenix.org/code/browser/sorttable

Big Pixel's Myth,
Litho.+Etching Accuracy boost Sensitivity, BSI beats FSI, CMos beats CCD.
When possible, several values of the Dxo-ISO Score have been taken into account
Of course they have to come from very Similar, if not Same sensors :
Pentax Q-Q10 = 2, Can120-Nik340 = 2, SamsNXmini = 10, NikonD600-750 = 3,
Pntax K5(II(s)) = 3, Pentax K3(II) = 2, Eos 60(0)d = 2, Other = 1.
In these cases, Averaged ISO Score value is used

Pentax Q Q10 at the Top of this Comparison with the Sony Exmor R imx078,
pentaxforums/fora/136pentax-Q/212387-Astro-Qclub-10 3 shades M27
pentaxforums/fora/136pentax-Q/212387-Astro-Qclub-11 Messier-33
pentaxforums/fora/136pentax-Q/212387-Astro-Qclub-12 IC-5146
pentaxforums/fora/136pentax-Q/212387-Astro-Qclub-13 M-51
Which are the Most Sensitive ILC-Camera's sensors : PentaxQ10AstroIR.html
but you'll have to thin their Bayonet Mount 0,2mm off : PentaxQLandscape.html
- Just for information, follow 1/1,7 BSI-sensor fixed-lens cameras -
Fourth, the Samsung NX mini, Exmor R imx183 : SamsungNXminiTopIR.html
NX mini is not as sensitive as the Q, Q10, but way more easy to modify and use.
chassimages/forum/index/topic,236962.100 M51 M16 M20 M27
chassimages/forum/index/topic,236962.150 M1 M42 M65 M66
chassimages/forum/index/topic,236962.200 M-106 Ngc6960
NX mini is an all purpose Astro- and Landscape-IR Camera. Easy for everyone :
dpreview.com/galleries/tags/nx-mini

Starvis Sensitivity Ranking: mV /µm², 1sec, f5,6

 Here is another way to compare sensors Sensitivity from Sony called "Starvis"
You have to multiply the Typical Voltage of 1 Pixel in 1/30 sec. at F/5,6 by 30
then you divide two times that result by the Pixel Pitch value = mV / µm² in 1 sec.
All these are taken from Sony Spec-Sheets in the Color or Green row = mV Typ.

Sony Starvis Criteria = BSI CMos sensors with sensitivity >= 2000 mV / µm²
I just inserted the Pentax Q7 and Q10 sensors and some Datas, the Pixel Pitch :

Starvis-Criteria
Clic Image, Ctrl+ to enlarge more

Starvis Sensitivity = 1 Pixel Typical-Voltage in 1/30s at F/5,6 x 30 / Pixel-Pitch ²

Green : 1 Pixel Typical-Voltage 1/30s F/5,6 x 30 / Pixel-Pitch / Pixel-Pitch µm
Mono : 1 Pixel Typical-Voltage 1/30s F/8 x 60 / Pixel-Pitch / Pixel-Pitch
1/30s F/8,0 = 1/60s F/5,6 : Camera Simulator, Exposure Calculator

- in case of *Digit value present, Multiply ( Typical-Voltage x 30 ) by it, ex.: x 0,1992

Sony Starvis Sensitivity Ranking : mV / µm² in 1 sec at f/5.6
Astro/CameraImx-PixelTypSizeMpHighWidtDiagmVtyp*DigitmV/µm²QE
Asi290m HCG2902,90BSI1/2,82,13,205,606,461200 8561 
Asi224g HCG2243,75FSI1/3"1,33,604,806,102350 5013 
Asi290g HCG2902,90BSI1/2,82,13,205,606,461300 4637 
Asi183mono1832,40BSI1"208,8013,215,9388
404284
Asi178mono1782,40BSI1/1,86,45,007,408,92380 3958 
Pentax Q10*0781,55BSI1/2,3124,606,157,701437,19923574 
PG250, 2522523,45FSI1/1,83,25,337,128,901146 2888?
PntaxQ7.Qs1?2261,85BSI1/1,7125,707,509,40280 2454 
Pentax Q ?1171,55BSI1/2,3124,606,157,70976,19922428 
Asi183NXmini1832,40BSI1"208,8013,215,91874,2465240680
Asi185green1853,75FSI1/1,92,34,607,308,581120 2389 
Asi178green1782,40BSI1/1,86,45,007,408,92425 2214 
Ptx Q7 Mx1 ?1441,85BSI1/1,7125,707,509,401202,18691969 
Asi174 PG2491745,86FSI1/1,22,37,1011,313,41000 874?
Unit µmTypinchMpmmmmmmmVtypmVmV/µm²%
To Sort Table, Click on Headers, reload page to unsort.
Thanks to Stuart Langridge Et Al. : kryogenix.org/code/browser/sorttable/

Big Pixel's Myth,
Lithography+Etching Precision increase Sensitivity, HCG boosts it more.
HCG = High Conversion Gain Mode : ~2 stages Amplification
*Digit (~ADU) : intermediate Value of Sony Calculations in some Spec-Sheets
2 Values of *Digit, because none could be found in the Sony imx078 SpecSheet :
- the 0,1992 Value from his brother the Sony imx117, then the Q10* 3574 mV/µm²
- 0,1869 Mean Value from 7 *Digit values found in Sony Specs, then 3354 mV/µm²
Pentax-Q-10-Astro-IR.html
Sony imx078cqk BSI Exmor Sensor Spec-Sheet to DownLoad :
DownLoad the 2 Sony Specs Pages with *Digit Values zipped to imx078cqk.zip
1 Value of *Digit, because none could be found in the Sony imx144 Spec-Sheet :
- 0,1869 Mean Value from 7 *Digit values found in Sony Specs from ~similar CMos

Few years ago, you'd have to be a Fortunate Professional Researcher to get a
BSI CCD Sensor, with High Energy Waste, and High Dark-Current Level, and No
possibility to get the Signal Cleaned, then Digitized " On Chip " : The Exmor Bonus !

From the Sony imx183 up to the imx078 sensor,
Sensitivity Numbers got from Both Methods, Confirm each other :
Pentax-Q10-IR-Astro.html

SNR1s Ranking: how little Light to Signal = Noise

 Sony SNR1s explanations page
As for the Starvis Sensitivity above, the 1st result is obtained - per pixel - but for
astrophotography, the subject, a deep sky object, activates a certain surface on the
sensor, whatever its pixel size, so we will try to convert this function per unit area.
Here it is a decreasing function : the larger the pixel, the lower the SNR1s value. So
we will first calculate the inverse function 1/y, then divide it 2 times by the size of the
pixel, then invert it again. Which comes simpler to multiply 2 times the SNR1s value
by the pixel Pitch in micrometer, the result is stored in the /µm² column.
Sony security sensors page w/ SNR1s values

D* is Pixel Detectivity = Binning-Factor * Q.E * Pixel-Area µm² / Read-Out Noise
Q.E = Quantum Efficiency - Read-Out Noise value at 30dB gain
Datas from astronomy-imaging-camera.com site manuals and product pages.
Detectivity Calculation from C.Buil 10-2020 astrosurf pages :
ZWO ASI294MM CAMERA EVALUATION

Sony SNR1s Ranking : how little Light for Signal = Noise
imxsbTpMpx"SizePtchsnr1s/µm²C/m*bitFpsD*bin
183???20,41,0002,40  mBI1202903,0 
183???20,41,0002,40  CBI1202902,7 
585aqj108,41/1,22,900,171,43CBI12090  
485lqj08,41/1,22,900,191,60CBI12090  
485lqj108,41/1,22,900,181,51CBI12090  
715aqr108,41/2,81,450,731,53CBI12090  
515aaqn08,41/2,81,450,761,60CBI12061  
415aaqr08,41/2,81,450,521,09,65812090  
415aamr08,41/2,81,450,791,66CBI12090  
334llr08,41/1,82,000,331,32,55912060  
334lqr08,41/1,82,000,592,36CBI12060  
412aack12,31/2,31,551,333,20CBI12060  
226clj12,41/1,71,850,531,81,55812040  
226cqj09,01/1,91,850,953,25CBI12040  
492???10,34/3,04,630,081,74,5801406014,92x2
294cjk10,34/3,04,630,143,00QBI1406012,42x2
178llj06,31/1,82,400,261,50,56514060  
178lqj05,31/1,92,400,462,65CBI14060  
335lln05,01/2,82,000,331,32,55912060  
335lqn05,01/2,82,000,592,36CBI12060  
464lqr04,11/1,82,900,191,60CBI12090  
464lqr104,11/1,82,900,181,51CBI12090  
347lqr04,11/1,82,900,191,60CBI12090  
482lqj02,01/1,25,800,072,35QBI10090 2x2
482lqj102,01/1,25,800,072,35QBI10090 2x2
462lqr02,01/2,82,900,181,51CBI12120  
462lqr102,01/2,82,900,171,43CBI12120  
327lqr02,01/2,82,900,181,51CBI12060  
327lqr102,01/2,82,900,171,43CBI12060  
307lqdr02,01/2,82,900,242,02CBI12060  
385lqr02,01/2,03,750,131,83Cfsi12120  
455???61,22,7003,760,091,23,5801602109,2 
455aqkk61,22,7003,760,152,12CBI1602108,1 
571???26,11,8003,760,091,23,5801604809,9 
571bqrj26,11,8003,760,152,12CBI1604808,7 
533cqkd09,01,0003,760,131,84CBI14064  
Click on Headers to Sort Table, reload page to unsort.
Thanks Stuart Langridge Et Al. https://kryogenix.org/code/browser/sorttable

Some useful things to notice :
- imx485 and imx515, despite different pixel Pitch but similar specifications, do
share identical per µm² of Area SNR1s values, a good verification for this table.

- New imx585 sensor gets the best Area SNR1s value vs old imx226 sensor gets
the worst Area SNR1s value, both RGB sensors, another verification for this table.
The old imx226 Monochrome sensor also shows the worst Area SNR1s value.

- For the Mono. sensors, the conversion factor of the SNR1s value from the RGB
to the Monochrome sensor is displayed instead of the "RGB" tag, column "Col/*".
= 0,580 is the averaged value of these 5 conversion factors from 0,558 to 0,658.

= One can evaluate the imx455-Monochrome's SNR1s value around 0,08 - 0,10
= One can evaluate the imx492's SNR1s value ( 294-Mono.) around 0,08 - 0,09
= One can evaluate the imx571-Monochrome's SNR1s value around 0,08 - 0,10

  © Dima Lootvoet 2010-25

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