https://www.cloudynights.com/topic/919397-sky-watcher-hac125-new-mini-rasa/ hac
125mm f2規格
hac 是指Honders Advanced Catadioptric Minigraph Optical Tube
1) You can only use 1.25” guide cameras with it. You are not able to use popular cooled cameras such as the 533 or 2600.
2) Focus is done via a helical in the middle of the corrector. There is no way to automate it and your hand blocks light when focusing.
3) You’re very limited on filters as they can only be 1.25” as they have to thread onto the front of the guide camera.
The telescope uses a very interesting optical design. I do hope the technology used in this telescope will be applied to others in the future. I would consider this a proof of concept for our ability to produce interesting reflecting type optical designs.
So while the HAC125 is very interesting it is quite limited in the modern era of imaging. I would see people getting this and being done with it a week later. But I do hope we see some of the tech used on future telescopes.
