本帖最后由 edward0102 于 2010-2-11 03:12 编辑
300元！是RMB么？这是哪只啊，有点动心啦，能给个提示不。先谢谢LZ
zhangqicd 发表于 2010-2-10 18:13
ZOOM 7-21mm (MJ-44 款), 大多替 ORION-OEM (也有人說有替星特朗 OEM, 可是官網上找不到), 這顆更便宜才 200 多...
以下是 ORION 給 ZOOM 7-21mm 的說明:
7-21mm Orion Explorer II Zoom Eyepiece
- Zoom eyepieces lets you change magnification power without changing eyepieces
- A twist of Explorer II's housing changes focal length from 21mm to 7mm
- Four-lens eyepiece has fully coated optics and exceptionally long eye relief
- The 1.25" barrel is threaded for filters
Now even the casual telescope user can enjoy the benefits of zoom eyepiece technology. A twist of the affordable 7-21mm Orion Explorer II Zoom Eyepiece housing changes the focal length from 21mm to 7mm, or to any focal length in between. That makes it ideal for locating an object at low magnification, then zooming in at higher magnifications for closer inspection. Without changing eyepieces! Actual magnification range will depend on the focal length of your telescope. It works equally well for astronomical or terrestrial viewing. This four-lens telescope eyepiece boasts fully coated optics and exceptionally long eye relief ranging from 33mm to 16mm. Apparent field of view is 30-deg at 21mm and 43-deg at 7mm. Rubber traction ring ensures a good grip. The 1.25" barrel is threaded for filters. A nice value in a quality zoom eyepiece!
以上我以紅/ 藍標注瞳距及視界說明, 這個在國內廠家/ 商家都沒標注...
以下是 ZOOM 7-21mm 的國內 OEM 製品圖 (注意有那條銀圈, 才是 MJ-44):
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