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本帖最后由 quantedge 于 2020-2-1 00:10 编辑
KOWA TSN-774,884 的直视正像棱镜一样,KOWA TSN-773,883 的45度正像棱镜一样?
884的直视正像棱镜和883的45度正像棱镜的素质一样吗,两者都上到100倍+200倍+,像质差不多?
Tamiji Homma 测试了883高倍效果,同时与 Swarovski ATX 95 objective module+EMS松本正向系统, 及TMB 92SS比较
“I tested Kowa at high power 270x. It produces excellent star image. I was very surprised.” “I have three copies of Swarovski ATX 95 objective modules. None comes close to the Kowa at high power.” "I would say Kowa TSN-883 is as good as TMB 92SS if your application is 25x-96x range. I tested a few short focal length eyepieces (Ethos SX 3.7mm, Takahashi LE3.6mm, Pentax XO 2.58, Nagler 2.5mm, Vixen 2.4mm, yielding 270x-416x), image still remains very sharp. It shows how well the spotting scope is made. Yes, image is not so bright at the power "
https://www.cloudynights.com/top ... or-astronomy/page-2
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