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Sensors Sensitivity Comparisons

Dima Sensor Sensitivity : DxoMark-ISO / mm²

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

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

Dima OSC Sensor Sensitivity : DxoMark-ISO / mm²
i-lens-cameraImx-PixelTypSizeMpHighWidtDiagDxoSSiso/mm²QEMaxIR+
Pntax Q.Q100781,55BSI1/2,3124,606,157,701866,5730sYes
can120nik3401,85BSI1/1,7125,707,509,402606,1915/60
Pentax Mx-11,85BSI1/1,7125,707,509,402084,9530s
Sams.NXmini1832,40BSI1"208,8013,215,95354,6180240sYes
Sony A7 III5,96BSIFF2424,035,943,237304,33Bulb
Sony A66002713,88FSIapsC2415,623,528,214974,08Bulb
Nikon D75004,20FSIapsC2015,623,528,214834,05Bulb
Pentax K-10944,80FSIFF3624,035,943,232803,81Bulb
Nikon D72003,90FSIapsC2415,623,528,213333,64Bulb
NikD600-7501285,96FSIFF2424,035,943,229533,43Bulb
PntaxK5(2(s))0714,78FSIapsC1615,723,628,412023,2550Bulb
Pentax K3(II)
3,90FSIapsC2415,623,528,211613,17Bulb
Eos 60(0)dCan4,28MosapsC1815,022,527,08032,38Bulb
Nikon D2HLbc9,55MosapsC415,523,728,33520,96Bulb
Mamiya ZDDals9,00CcdMF2236,048,060,02450,14
UnitµmTypinchMpmmmmmmDxoSSiso/mm²%sec.ease
Click on Headers to Sort, reload page to unsort.
Thanks to Stuart Langridge Et Al. : kryogenix.org/code/browser/sorttable

Big Pixel's Myth,
Litho.+Etching Accuracy increase 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, Average 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

Sony Starvis Sensitivity : mV / µm² in 1 sec at f/5,6

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 : mV / µm²
Astro/CameraImx-PixelTypSizeMpHighWidtDiagmVtyp*DigitmV/µm²QE
Asi290m HCG2902,90BSI1/2,82,13,205,606,4612008561
Asi224g HCG2243,75FSI1/3"1,33,604,806,1023505013
Asi290g HCG2902,90BSI1/2,82,13,205,606,4613004637
Asi183mono1832,40BSI1"208,8013,215,9388
404284
Asi178mono1782,40BSI1/1,86,45,007,408,923803958
Pentax Q10*0781,55BSI1/2,3124,606,157,701437,19923574
PG250, 2522523,45FSI1/1,83,25,337,128,9011462888?
PntaxQ7.Qs1?2261,85BSI1/1,7125,707,509,402802454
Pentax Q ?1171,55BSI1/2,3124,606,157,70976,19922428
Asi183NXmini1832,40BSI1"208,8013,215,91874,2465240680
Asi185green1853,75FSI1/1,92,34,607,308,5811202389
Asi178green1782,40BSI1/1,86,45,007,408,924252214
Ptx Q7 Mx1 ?1441,85BSI1/1,7125,707,509,401202,18691969
Asi174 PG2491745,86FSI1/1,22,37,1011,313,41000874?
UnitµmTypinchMpmmmmmmmVtypmVmV/µm²%
Click on Headers to Sort, 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-Q10-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-Astro-IR.html

Sony SNR1s : how little Light for 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 simplier to multiply 2 times the SNR1s value
by the pixel Pitch in micrometer, the result is stored in the /m column.
Sony security sensors page w/ SNR1s values

D* is Pixel Detectivity = Binning-Factor * Q.E * Pixel-Area m / 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 table : how little Light for Signal = Noise
imxsbTpMpx"SizePtchsnr1s/mC/m*bitFpsD*bin
183???20,41,0002,40mBI1202903,0
183???20,41,0002,40CBI1202902,7
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
482lqj02,01/1,25,800,072,35QBI100902x2
482lqj102,01/1,25,800,072,35QBI100902x2
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, reload page to unsort.
Thanks to Stuart Langridge Et Al. : kryogenix.org/code/browser/sorttable

Some useful things to notice :
- imx485 and imx515, despite different pixel Pitch but similar specifications, do
share identical per m 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 convertion 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 convertion 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 2010-21

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