Nikon 1" FSI sensors were Not Better than Sony 1/1.7" BSI sensors, and far behind Sony 1" BSI ones. Nikon ended with a good 1" BSI in its 1J5, but
this was 2 years too late. The Best 1/2.3" BSI sensor is inside the Pentax Q-10 ! Its performances are at the level of the Nikon 1v2 with a 4x
larger sensor, but 14 MPix FSI. The Q10 is slightly better than the Mx1 with a 1/1.7" BSI sensor. A 1" sensor is ~4x larger but a 1/1.7 is only
~1.5x the Aera of a 1/2.3" sensor.
Small Sensors averaged Dimensions : Diagonal mm - Width*Height - Area² Clic Image, Ctrl+ to Enlarge
Drawbacks of Pentax Q-Q10, despite its 1/2.3" Fabulous imx078 BSI sensor ~ Drawbacks in yellow could certainly be Fixed by a FirmWare Hack/Update ... Please read : Pentax-Q10 FirmWare-v1.03-Disassembly ~ Bulb + Manual Mode limited to 30 sec. Exposure w/ Pentax Q4K Adapter ~ ISO 1600 => Amp-Glow at the Bottom-Left of the frame + Random LENR = 2-4 min. Long Exposures at ISO 800-400 to avoid Amp-Glow and LENR ... Please read : Samsung NX-mini Top-Astro+IR ~ No way to set the LENR, Long Exposure Noise Reduction, fully ON or OFF ~ Camera Temperature Not Recorded in EXIF Data for Exposure > ~10 sec. ~ IR Remote Control doesn't work with Bulb, nor Intervalometer – Multi-Exposure Mode outputs a JPEG file, not a RAW file – No Wired Remote Control Port on Pentax Q, Q10, Q7, Qs1 – 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 mm – 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 pentaxforums.com/frms/136pentaxQ/212387-astroQclub-13.html#post3274556 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 : https://photonstophotos.net Clic Image, Ctrl+ to Enlarge
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. – Q-for-K optional Adapter open the Q & Q10 to the whole 'K' Lens System – Q-Q10 have a 1Ah Battery, it lasts 1 summer night w/o Live-View abuse. – the Q-10 is a CostLess camera : I bought mine for €170 in spring 2014 – the IR-Cut filter of the Q-Q10 is Easy to Remove : Pentax-Q10-Astro-IR www.dpreview.com/galleries/tags/pentax-q10
How to Hold a 1"25 Astro Filter inside the Pentax Q for K Adapter – first, you need ~10 cm of Steel Piano Wire, diameter 1 mm – bend it to get a ~29.5 mm external diameter Ring – over-bend the 2 ends of the Ring to avoid tearing the felt – place your clean Filter separated from its mount ring in the housing... the housing surrounded by 6 screws at the bottom of the Pentax Q4K Adapter – secure the Filter in place with your HomeMade Ring taking care of black felt – that's it, you're now ready to use your Pentax Q or Q10 for AstroPhotography
A standard 1"25 Baader SkyGlow Filter, removed from its mount ring Q4K Adapter + M42 T2 Ring - a 29.5mm Wire-Ring keeps the Filter in place F11, Clic Image to Enlarge
