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A OSC doesn’t mean that you need to spend less time. Doesn’t change any time constraints. There are pros and cons though. Given the same integration time mono will always give superior results when comparing like for like (ASI1600MM-C vs ASI1600MC-C). Colour has convenience in that you will always have usable data, clouds cannot roll in ruining all your blue exposures requiring another night to be able to process.
Actually it does affect exposure time OSC are routinely a fraction of the QE of mono. That is improving with CMOS sensors used in modern digital cameras like the latest Sony Exmor backside illuminated sensors gapless microlenses and copper wiring.
OSC is a compromise. Every shot counts for sure and that its strength. But equally every shot is way noisier due to the low QE.
I used an STL11 OSC for a while. It was great for the brighter objects but objects that had a lot of dust or were dim showed up way too much noise.
Short exposures won't help there because its simply not recording the faint data in first place, 500 x 0 is still 0.
OSC are great for making every shot count (filtered imaging means you miss getting one of the items needed for a colour photo due to cloud etc).
They are great for bright objects but you won't be able to go as deep as same total exposure of a mono filtered image. They are also relatively poor at narrowband imaging.
Greg.
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