lbte 发表于 2013-1-22 18:45
本来就是国产的，我觉得成本高不过HEQ5PRO，价格和HEQ5PRO差不多就可以了，HEQ5PRO现在也就5000出头 ...
一个外国网友的评论：
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5615996/Main/5613234
翻译软件粗略翻译和原文:
所以我们有很多很好的出现变化,VX与cg 5…
HC - NexStar相同+(非常重要的兼容性和功能效益)
额外的辅助端口(适合配件像SkySync和SkySense——不需要一个辅助端口扩展器)
更好的alt和az调整(不错的改变,人们在这个领域总是改变位置)
更好的发动机和变速箱(更快也希望降低PE)
较小的电机外壳(适合间隙问题)
机械能够追踪20°经过子午线(好,更少的疏忽的子午线弹)
外部12月电缆(类似于原始但似乎短和路由更好)
相同的平衡轴直径(良好的兼容性与原始cg 5水煤浆)
塑造了11磅配重(适合间隙问题在低纬度)
类似三脚架(有利于稳定)
压电陶瓷(适合成像仪)
RTC(好),应该能够hibernate和回来没有数据输入)
更好的鞍(两个螺栓和宽间距将提供更健壮的夹紧和仍然使用同样在cg 5相吻合)
线程在电力连接器——像CGEM / CGE Pro(好,将消除许多间歇电问题)
我不喜欢…
三脚架腿夹旋钮仍在外面(电缆妨碍潜在)
增加的安培数的要求(不是一个大的交易,但将推动人们到5安培CGEM / CGE Pro交流电源适配器是3倍的价格2.5安培模型)——和我打赌穷人Celestron直流电力电缆将变得更加的问题,除非它已经升级过。
仍然是回答说……
轴承使用在12月轴吗?
12月轴是多么平稳当autoguiding(和数量的反弹)
体育目标和如何平滑转换
因此,总体上有漂亮的改进对视觉的工作和大改进成像仪。为一个额外的100美元(且更加自CG-5s不出售列表)VX看起来像一个明确的赢家。
So it appears we have lots of good changes with the VX mount compared to the CG-5 ...
Same HC - NexStar+ (very important for compatibility and functionality benefits)
Additional AUX port (good for accessories like SkySync and SkySense - no need for an AUX port extender)
Better alt and az adjustments (nice change for folks in the field who are always changing the positions)
Better motors and gearbox (faster slews and hopefully lower PE)
Smaller motor housings (good for clearance issues)
Mechanically able to track 20° past the meridian (good, less inadvertent meridian flips)
External dec cable (similar to original but appears to be shorter and routed better)
Same counterweight shaft diameter (good for compatibility with original CG-5 CWs)
Shaped 11lb counterweight (good for clearance issues at lower latitudes)
Similar tripod (good for stability)
PEC (good for imagers)
RTC (good - should be able to hibernate and come back without data input)
Better saddle (two bolts and wide spacing will provide more robust clamping and still use same dovetails as on CG-5)
Thread on power connector - like CGEM/CGE Pro (good, will eliminate many intermittent electrical issues)
What I didn't like ...
Tripod leg clamp knobs are still on the outside (cable snagging potential)
Increased amperage requirement (not a big deal but will push folks to the 5 amp CGEM/CGE Pro AC power adapter which is 3x the price of the 2.5 amp model) - and I'll bet the very poor Celestron DC power cable will now become even more of an issue unless it's been upgraded too.
Still to be answered ...
Bearings used on the DEC axis?
How smooth the DEC axis is when autoguiding (and amount of backlash)
PE targets and how smooth the transitions are
So in general there are nice improvements for visual work and big improvements for imagers. For an extra $100 (and actually a bit more since CG-5s are not sold at list) the VX looks like a clear winner.
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