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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 Sensor Sensitivity : DxoMark-ISO / mm²
i-lens-cameraImx-PixelTypSizeMpHighWidtDxoIsoIso/mm²DiagExpoIRcut
Pntax Q.Q100781,55BSI1/2,3124,606,151866,577,7030sYes
can120.nik340 1,85BSI1/1,7125,707,502606,199,4015.60 
Pentax Mx-1 1,85BSI1/1,7125,707,502084,959,4030s 
Sams.NXmini1832,40BSI1"208,8013,25354,6115,9240sYes
Sony A7 III 5,96BSIFF2424,035,937304,3343,2Bulb 
Nikon D7500 4,20FSIapsC2015,623,514834,0528,2Bulb 
Pentax K-10944,80FSIFF3624,035,932803,8143,2Bulb 
Nikon D7200 3,90FSIapsC2415,623,513333,6428,2Bulb 
NikoD600.6101285,96FSIFF2424,035,929533,4343,2Bulb 
PntaxK5(2(s))0714,78FSIapsC1615,723,612023,2528,4Bulb 
Pentax K3(II)
3,90FSIapsC2415,623,511613,1728,2Bulb 
Eos 60(0)dCan4,28MosapsC1815,022,58032,3827,0Bulb 
Nikon D2HLbc9,55MosapsC415,523,73520,9628,3Bulb 
Mamiya ZDDals9,00CcdMF2236,048,02450,1460,0  
Unit µmTypinchMpmmmmDxoIsoIso/mm²mmsec.Easy

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, NikonD600-610 : 2,
Pntax K5(II(s)) : 3, Pentax K3(II) : 2, Eos 60(0)d : 2

In these cases, ISO Mean Value is used

Pentax Q Q10 at the Top of this Comparison with the Sony Exmor R imx078,
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
Followed by 3 fixed-lens cameras with 1/1,7 BSI sensors = just for information.
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.
NX mini is an all purpose Astro- and Landscape-IR Camera. Easy for beginners !

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

Color : 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-PixelTypSizeMpHighWidtmVtyp*DigitmV/µm²Diag
Asi290m HCG2902,90BSI1/2,82,13,205,601200 85616,46
Asi224c HCG2243,75FSI1/3"1,33,604,802350 50136,10
Asi290c HCG2902,90BSI1/2,82,13,205,601300 46376,46
Asi183mono1832,40BSI1"208,8013,2388
404215,9
Asi178mono1782,40BSI1/1,86,45,007,40380 39588,92
Pentax Q10*0781,55BSI1/2,3124,606,151437,199235747,70
PG250, 2522523,45FSI1/1,83,25,337,121146 28888,90
PntaxQ7.Qs1?2261,85BSI1/1,7125,707,50280 24549,40
Pentax Q ?1171,55BSI1/2,3124,606,15976,199224287,70
Asi183.NXmini1832,40BSI1"208,8013,21874,2465240615,9
Asi185c1853,75FSI1/1,92,34,607,301120 23898,58
Asi178color1782,40BSI1/1,86,45,007,40425 22148,92
Ptx Q7 Mx1 ?1441,85BSI1/1,7125,707,501202,186919699,40
Asi174, PG2491745,86FSI1/1,22,37,1011,31000 87413,4
Units µmTypinchMpmmmmmVtypmVmV/µm²mm

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
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
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
~> Sony imx078cqk BSI Exmor Sensor Spec-Sheet to DownLoad :
DownLoad the 2 Sony Specs Pages with *Digit Values zipped to imx078cqk.zip

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

      ©Dima Lootvoet 2010-20

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