y Grand Eye suggestion 巨 眼 推 介
y 
K 型經緯台, 可負載6寸折反鏡
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GA-4 Guiding eyepiece 由日本VIXEN所設計的GA-4導星目鏡，是目前愛好天文攝影的玩家所必備的一項工具。它在玻璃面蝕刻精密的圖紋，加上暗視野照明裝置的貼心設計，VIXEN GA-4導星裝置系列一直是天文攝影中最令人激賞的。結合十字及圓圈兩種形式的刻畫提供了導星時的便捷，十字的直線刻畫分割線間隔為 5"（31.7mm 用為 8.6"），圓周刻畫的間隔則為10度。GA-4的底座上的旋鈕可以使刻畫旋轉及做XY方向移動，提供「不移動重而不便的導星鏡」就可以使刻度環中心對準導引星的好方法。
GA-4目前有二種規格，分別適用於24.5mm及31.7mm目鏡使用，其導星的容許範圍也不同（請見刻度環容許範圍對照表）。就導星精度而言，24.5mm規格用的GA-4應該是比較好的選擇，價格也比較便宜，也是目前國內最常使用的規格。 |
 GA－4各部位名稱 （１）刻度環 |
Illuminated
Guiding Adapter GA-4 (1-1/4") The Vixen GA-4 illuminated Guiding Adapter projects an illuminated reticle image of concentric guiding circles and cross hairs. It is an indispensable accessory for astrophotography. Some of its features are: 1. A red reticle image of adjustable intensity is projected on the field of view of the eyepiece. The star image stays visible when it is on the reticle. 2. A 3x Barlow lens is built-in for accurate guiding. 3. A lock ring holds the eyepiece in place. The eyepiece-holder rotates to adjust the reticle image focus. 4. The position of the reticle image can be easily adjusted without moving the eyepiece. 5. Uses two LR-44 alkaline batteries (included). Weight: 312 grams / 11 oz |
刻度環容許範圍對照表
| 第一圈 | 第二圈 | 第三圈 | 第四圈 | 第五圈 | 第六圈 | |
| 24.5mm | 800mm | 400mm | 200mm | 100mm | 50mm | 25mm |
| 31.7mm | 464mm | 232mm | 116mm | 58mm | 29mm | 14.5mm |
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Famous for 2 decades, made in Japan, AR EQ mount was
discontinued, we got the last 1 set from the whole world (except Japan) , with 5" reflector,
R.A. motor & polar finder HK$8,600.00
the other set AR mount with R.A. motor & aluminum
tripod, HK$5,300.00 sold
out
Only
Mizar 5" reflector w/6x30 finder OTA in stock HK$2,200.00
一代名機 AR赤道儀
(Mizar代表作,日本製造)
已經停產, 本公司覓得全球(日本除外)最後壹台, 配Mizar 5"反射鏡及赤經馬達,極軸鏡發售,
價格HK$8,600.
另壹台淨AR
赤道儀連極軸鏡, 赤經馬達及鋁腳, 價格HK$5,300.售完
| Mizar
130mm (5") reflector + AR mount + R.A. motor Specification: Telescope: 130mm Newtonian reflector Focal length: 720mm f/5.5 Focuser: rack & pinion with 1.25" eyepiece holder Finder: 6x30 Main mirror: Pyrex with aluminum coating Equatorial mount: 120 teeth worm gear on both R.A. & declination axis Loading: 7kg Accuracy: +/- 10 sec. R.A. drive: Synchronize motor DC4.5~12V Power consumption: 150mA Battery compartment: C size cell x 4 Northern & Southern hemisphere usable 規格: 望遠鏡: 130mm牛頓式反射鏡 焦距: 720mm f/5.5 對焦座: 天梯牙式調控 1.25"目鏡座 尋星鏡: 6x30 主鏡: Pyrex物料鍍鋁 赤道儀: 赤經及赤緯皆120齒鍋牙 負載: 7公斤 精度: +/- 10秒 赤經驅動: 同步馬達 直流4.5~12V 耗電量: 150mA 電池座: C型電池4枚 南北半球均可使用 |
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K
mount 微 動 經 緯 台
