OSC Narrowband vs. Mono Narrowband (Werner Stumpferl)

OSC Narrowband vs. Mono Narrowband

Here I have made a comparison between an OSC camera (QHY294C) and a Mono camera (QHY294M).
For the OSC I have used a Optolong l-eXtreme Dual Narrowband Filter where I have extracted the Ha-Channel with a total intetration time of round about 5 hours.
On the other side I have used a Mono camera with Antlia 4.5nm Ha-Filter.
First I have compared what signal I get if I use in total the same exposure time, 5h Dual Narrowband vs. 2h Ha (and 2h O3). This is left and middle picture.
Second, I have compared what signal I get if I use the same exposure time for Ha, left and right picture.
In both cases you can see that this Mono camera is more sensitive (better SNR) and has a better resolution over all. Both cameras have a IMX294 Sensor, 4164 x 2795 Pixel with 4.63um size.
The red pixel of the OSC has only 1/4 of the size of the Mono, so the result is no surprise.
I have no comparison in O3 yet, but here should be the results very close together because for blue/green the bayermatrix has 3/4 of the pixelsize instead of 4/4 of the pixelsize with Mono.
If I have enough data for O3, I will share the results too.
From my point of view Mono is undefeated regarding resolution and signal ... but ... OSC is undefeated in price (cheaper camera, only 1 Dual-NB-Filter vs. more expensive camera with min. 2 NB-Filters plus RGB-Filters).

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