MeadeETX-90PE怎么样？？？

3L链接

to an 80mm ED (Orion) (F7.5) on a full equatorial mount
the Orion 80mm ED has a slight optical superiority in contrast
the Orion is greatly superior in terms of FOV and cool down
the ETX & Orion are equal on detail and near focus
the Orion is slightly superior on deep sky viewing
the ETX is slightly superior on chromatic correction
the Orion is mechanically superior
ETX is superior in terms of portability

这么说目视还是比不上Orion那个级别的80ED～

回复 21# 家猫战斗力


    这结果能接受，，，，，，，，，，，

回复 22# feng1734


   
下面那个

to an APM 102mm triplet achromat (F6) on a full equatorial mount

the ETX is optically superior (contrast, detail, chromaticism, near focus)

the APM is greatly superior in terms of FOV and cool down

the ETX & APM are probably equal on deep sky viewing

the APM is mechanically easier to use

the ETX is superior in terms of portability

似乎说明APM的短焦普消不怎么样（第一条）～

回复 23# 家猫战斗力


    短焦普消看来都做不好，，，，不过我怀疑是三胶合吧，如果是三分离的话，设计上的自由度还是很多的，像差纠正应该可以处理得不错的，，，，

可惜OTA不单卖了，要不买个125还是很实用的