Reason for ASI174MM vs ASI178MM-Cool

levente

What is the advantage of the ASI 174MM over the 178MM-Cool? They are in the same price range, whilst the 178MM-Cool is cooled, has smaller pixel size and is back-illuminated. All I can think as an advantege of the 174 MM is the larger sensor size. What about sensitivity, noise etc?

So the question is: what is the reason for choosing the ASI 174MM over the 178MM-Cool?

Thanks,

Levente

Sam@ZWO

the sensitivity is very close with each other

but 178 has less noise, lower read noise than 174

so for DSO imaging, 178cool is better