Dear David,David 寫: I have no experience with this scope, and so you may need to wait for other user's opinion. My guess (may be wrong) is that the difference is not really that noticeable visually unless one really looks carefully for the difference. May be the effect on photography with larger CMOS is more significant. i.e. hardly any effect on planetary imaging with much smaller CMOS.
With C8 or 8" ACF, other factors may be more important in order to give a good image: good atmospheric seeing (i.e. how turbulent the atmosphere is) and whether you have collimated your scope accurately before use. My guess is that whether the scope is ACF or not is not that crucial. So if one already has C8, it is not worth switching to 8"ACF.
However, since you are just starting your hobby, I am sure that you won't be disappointed with either C8 or 8"ACF. It is just the matter of cost.
I have both LXD75 and also HEQ5Pro. You are welcome to contact me if you want to try them.
Right I think either scope will not disappoint me. As u mentioned I am at the point of staring my hobby, I need to spend more time on selecting the right equipment. I need to find an all rounded scope for both nice visual viewing & photography, Perhaps as cheap as possible ! Well, good equipments are usually not cheap! I am trying to strike a balance here. BTW, I would like to see ur mounts and I will contact u for the arrangement, but it is not urgent.
Regards,
Willis