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Pentax Q10, the most sensitive sensor

Pentax Q, Q-10 for Astro-photography

How could this small CostLess digicam's tiny sensor be so Sensitive ?

Pentax Q, Q10 1/2.3" BSI vs Bigger Cameras, then vs Astro-Cameras

Click Image, Ctrl+ to enlarge more

From the Sony imx183 (SamsNXmini) up to Sony imx078 (PentaxQ, Q10)
both Dima & Sony Calculation methods show a ~43% increase in Sensitivity,
a ~43% increase in Sensitivity is as opening Aperture from f/5 up to ~f/4.2 !
For Q-Q10 Sony Calculations : 3574 and 3354 are averaged to 3464 value.
~> Sensor's main page for Fully Detailed informations : SensorCompare.html
One can see that it's Not its Big Pixels that make the Sensitivity of a Sensor !
It's rather the Precision of 1st the Lithography process 2nd the Etching process,
down to 90nm for its brother imx118, that let Sony maximising their Fill-Factor.

~> Pentax Q7 Full Review :
~> Pentax Q Review :
PhotographyBlog :

~> Sony imx078cqk BSI Exmor Sensor Specification Sheets to DownLoad :
DownLoad the 2 Sony Specs Pages with *Digit Value zipped to
25 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 !
Right-Click, View-Image to enlarge these DSSO pics : Deep Sky Small Objects
Q10-DSSO x3  pentaxforums./forums/136-pentax-q/212387-Astro-Q-club-10
Q10-DSSO x1  pentaxforums./forums/136-pentax-q/212387-Astro-Q-club-11
Q10-DSSO x3  pentaxforums./forums/136-pentax-q/212387-Astro-Q-club-12
Q10-DSSO x2  pentaxforums./forums/136-pentax-q/212387-Astro-Q-club-13
At the end of that P.13, orio posted a nice Clownface-Eskimo-Nebula Ngc2392,
Honesty forces me to say that IR-Cut Removal is Not a plus for that Blue Nebula
Drawbacks of Pentax Q-Q10 despite its 1/2.3" Fabulous imx078 BSI sensor
– Bulb + Manual Mode limited to 30 sec. Exposure w/ Pentax K2Q Adapter
– ISO 1600(+) show slight Amp-Glow in the Bottom-Left corner of the frame
– Multi-Exposure Mode outputs a JPEG file, not a RAW
– IR Remote doesn't work w/ Bulb nor Intervalometer
– No Wired Remote Control Port on Pentax Q, Q10, Q7, Qs1
– No way to set the LENR totally ON or OFF
– IRcut removed, the Auto/Manual-Focus doesn't work w/ 5-15 mm zoom lens
... except for subjects at (very) Short Distances. Ditto to expect from 15-45...
Tiny Pixels are in Love with the Highest Precision from Belt-Driven-Eq-Mount
... I only own an Old Black HEQ5, thus being forced to Trash ~50% of my subs
One, 1 arc-second = 1/1 296 000 of a Circle... IOW 1/3 600 of 1 Degree...
1 degree is ~half your thumb's nail width, your arm held out to the sky...
you'll have to draw 7 200 parallel fine lines on your thumb's nail !
... That is, looking from your arm's full length... Good luck !
Bill Claff's Photo Dynamic Range ranking : Sony 1" BSI, Pentax Q10, Nikon 1"
... FSI, some older Classic APSc cameras, iphone7 :
PDR tiny BSI CMos sensors
Click Image, Ctrl+ to enlarge more
More Advantages to the Pentax Q, Q10 over other 1/2.3" BSI cameras
– Q - Q10 are unique 1/2.3" BSI cam. to support Interchangeable Lenses.
– K-to-Q optional Adapters open the Q & Q10 to the whole K Lens System
– Q-Q10 have a 1000 mAh Battery, it lasts 1 summer night in precise conditions
– the Q-10 is a CostLess camera : I bought mine for €170 in spring 2014
– the IR-Cut filter inside the Q, Q10 is Easy to Remove (read next)

Removing its IR-cut filter to increase IR+Red SNR

How to Remove the IR-Cut filter from the inside of the Pentax Q / Q10
Please, don't begin doing it if you don't feel able to achieve it...
It's Your Own Full Responsability to do it... Or not to...

– 0) Remove the Battery and the Lens on a clean well lit clear surface...
– 1) Lock the IR-Filter-Box on 4 sides with 4 bent paper-pieces...
– 2) Draw 4 Lines at 1.2 mm from 4 sides of the IR-Filter-Box...
... same as the dotted-lines seen on Q10cmosIRcut.png
– 3) Gently Cut the Plastic following the 4 lines...
... it's ~1 mm thick and Easy to cut.
– 4) Separate and remove the Plastic Rectangle you've just cut off...
– 5) Here is the IR-Cut filter, maybe you'll have to Cut a little more plastic to free it...
– 6) the IR-Cut filter & its Bellows will jump out, to store in a clean paper wallet...
... to separate the Filter, Cut its Flat-Wire x2 that Powers the Piezo Element.
The Density of the IR-Cut filter is about ~1.2 Ev.
Careful : No things on sensor !
Click Image, F11 to enlarge
For those who want to replace the original IR-Cut Filter with a Clear Glass or...
another IR-Cut Filter at 680 or 720 nm, here are its exact Dimensions :
- Thickness : 0.6 mm
- Height : 12.6 mm
- Width : 13.1 mm

– 7) let's remount the Lens, the Battery and Power-on the Q...
– 8) record a Custom-White-Balance setting from White Paper sheet...
– 9) shooting a landscape will show Pinkish Foliage...
Saving a Custom-White-Balance setting from Foliages, will show them Whitish.
IR-Cut removed, the Auto/Manual-Focus doesn't work w/ 5-15 mm zoom lens
... except for subjects at (very)Short Distances. Same to expect from 15-45...
unless you thin their Bayonet Mount of 0.2 mm off : PentaxQLandscapeIR.html
Pentax Q10 w/o its IRcut filter, note the x2 Flat-Wire that powers the Piezo.
Click Image, F11 to enlarge
Bravo, you did it ! ;)
Ha-DSSO=IR-Deep-Sky-Small-Objects, will be way easier to shoot now...
IC-5146 Cocoon Nebula, perfect example, will remain invisible on your LCD
after 30 sec. at ISO 1600 w/o IR-cut : find its way among Surrounding Stars !
But, after 60 Exposures Stacked... and a Strong Push... You'll start to see it :
      ©Dima Lootvoet 2010-19

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