市面上流行的应该是俄国的好,例如IntesMicro的马卡、马牛镜。如果能淘到二手的,价钱也不贵。以下链接是我们这里一位同好用六寸IntesMicro马卡在大年初一夜里的观测记录:
http://www.singastro.org/viewtopic.php?t=3080&start=0
“brief report from me:
- absolutely no dew for the whole night (don't even need dewshield)
- sky was not the best mersing can offer, but when the clouds cleared up, the view was pretty good
- highlights of the evening is orion region (m43,m42,m78,barnard33,rosette,witchhead,ngc1975,m1,flame), sombrero, m81, m83 galaxies, and eta carinae region
- our first time catching a glimpse of the horsehead nebula
- comparing my m603 to my previous C8s, the view is more pleasing due to better contrast and better optics (in and out focus of the airy disk pattern is almost identical), this makes up the 2" aperture difference.
- did a lot of eyepiece comparison on my f/10 scope:
-- 40mm XL vs 40mm XW vs 40mm MK70: the view is almost the same, XW slightly better in contrast
-- 21mm XL vs 20mm XW vs 22mm Pan: i can't see much difference, will keep my Pano
-- 11mm Nagler vs 14mm XL vs 14mm XW: i think it's a tie. has better widefield view on the Nagler, but the XL/XW is slightly better in contrast.”
当中提到6寸的M603有超越C8的表现。 |