IMHO you don’t need an 80mm scope to significantly upgrade what a SeeStar S50 could do. Just go look at some of the best Astro photos from people with 50 mm refractors and you’ll see what is possible.
An 80mm option would be wonderful, but I think the cost increase would not be worth it unless they improved a few key things that could also be done on the S50:
1) A larger sensor, such as the IMX533 11.3x11.3mm 9 megapixel chip or the newer ~7x7mm square sensor Sony recently released. Images would cover a much larger field of view and be much more than 2 megapixels. Also, this essentially increases total light gathering power by the ratio of the area of the sensor in a similar way that lowering the F-ratio does.
2) To use a larger sensor, you probably need the optics to be closer to a true achromatic with a reducer/field flattener. So possibly improved fundamental optical glass.
3) Supporting an equitorial mode or at least a mode where the scope can be tilted away from the target by a modest angle to greatly reduce field rotation (semi equitorial). This is being done now by creative individuals but just needs to be officially software supported with hardware that is robust to this mode of operation.
4) Improved processing that automates even more of what experienced deep sky astrophotographers do with their sophisticated imaging toolchain (Imagine the equivalent of BlurXterminator and NoiseXterminator being built in). With the right “BlurX” like functionality, it can make up for some defects in the optics. This may require an enhanced processing chip or utilizing the cell phone/tablet computing power.
I think much of this can be done in a similar form factor (compact size) and possibly with a modest increase in cost (still well under $1000 perhaps).
These would make the S50 a truly powerful tool that would seriously compete with what the average person can do with a custom rig.
Edited by smiller, 07 January 2024 - 02:24 PM.