Meade NG70折射式望远镜，想加个Barlow?
给儿子买了一个Meade NG70折射式望远镜，参数如下：Brand:Meade Usage:For the Beginner Weight Complete:4 lbs Finderscope:Red Dot Finder Lens Coating:multi-coated GPS:No GoTo:No Good for Astrophotography:No Telescopes Series:NG-Series Telescopes Optical Design:Refractor Aperture:70mm Focal Length:700mm Focal Ratio:f/10 Mount Design:Single Fork Arm Battery Included:No Eyepiece 1:SP9.7mm Eyepiece 2:SP26mm Highest Useful Magnification:140x Limiting Magnitude:11.7 Resolution:1.65 Resolving Power:1.65 Star Diagonal:1.25 Inches
各们DX我是不是可以加一个Barlow镜，不知值不值？
若加的话，是应该加2X的还是3X的，是加Meade的还是其它品牌呢？
在http://www.telescopes.com/telesc ... /8197+8200+8216.cfm查到一个：
Meade Eyepiece and Barlow Lens Telescope Accessory Kit Item MEAD317 List Price: $29.95
Our Price: $29.95
[*]Accessory kit for Meade telescopes[*]1 17.5mm MA eyepiece included[*]1 #126 2x Barlow lens also included[*]Enhance telescopes power for clear, contrasting images[*]Allows higher magnification and more light transmission不知道合适不？好像好多刀哟...
[ 本帖最后由 registor 于 2008-3-30 23:10 编辑 ] 买个国产普通的2X就足够了，大约人民币一百左右
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