行星目鏡的選擇 - Mono vs Nikon, Radian vs Zeiss....

[社長]

我的好友，德國APM負責人Markus Ludes對目視觀測是很有一手的，也是鑑定各類望遠鏡及目鏡的專家。 viewtopic.php?f=13&t=85 最近代理了日本Nikon的天文目鏡，表現得很興奮，我問他一個問題，就是跟 TMB Supermonocentric 目鏡在月面行星上的表現，當然心底裡是有答案的。

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引述電郵內容如下，也對各同好有一定參考價值：
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yes 8 lenses with many airspaces always sharper the the worldbest planetary design with 3 cemented lenses (這句他開玩笑)

what I find myself : old test Zeiss Ortho against Radian. Zeiss is sharper and has better contrast , no question , if you looking as a real planetary observer for finest details the zeiss is the way to go.
But if you just occassionaly watch the Planets , the Radin offer a more relaxed view due the larger FOV and better eyerelief, so non experienced observers may prefer the Radian

same is as mono and NIKON

btw the old NIKON 7 mm 72° ( spotting scope eyepiece 60x775x) has better contrast less straylight then the new astro eyepiece

so when I observe Planets and I have time and I am relaxed, then I use Monos , but if I have not much time and just want to look to Planets then I use Naglers, Ethos and and others

Markus
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因此，我的目鏡手提箱裡只有Televue Ethos及TMB Supermonocentric，兩個Pentax XO是短暫測試之用。Ethos作輕鬆欣賞深空天體，Supermonocentric專攻行星月面，但要聚精滙神累一點，這是必要的代價。

參考連結：
viewtopic.php?f=5&t=68
viewtopic.php?f=5&t=23

[Nebulas]

Ethos这几天在S&T杂志上见得多，我想13,10，17的看深空很不错，100度视野！对高倍的TMB目镜很是疑惑，外观看起来像XO目镜！

[Nebulas]

笔者觉得Mono较TeleVue费时,可能源自视场小吗？

[社長]

大視場和高出眼點的目鏡看來會舒服的，當眼睛疲勞時便較容易看到更多細節。但看Mono目鏡時會緊張一點，若聚精匯精看，會看出更多細節。

當然以上的情況也會因人而異有程度上的分別。