|
主題: C8HD reducer 為何出現 4.3 ? VARIABLE FOCAL REDUCER 作者: peter 於 2018-09-27 21:28:05 http://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=31141.0
Celestron 8-inch EdgeHD at f/4.3 好怪阿 https://www.cloudynights.com/topic/564353-celestron-edge-hd-8-07x-focal-reducer-question/ https://www.celestron.com/products/reducer-lens-7x-edgehd-800 一般 reducer 0.7 傳統 C8 有 0.63 主題: 回覆： C8HD reducer 不是 0.7 嗎? 為何出現 4.3 ? 作者: peter 於 2018-09-28 05:36:19 可變 reducer ?
VARIABLE MODULAR FOCAL REDUCER http://www.astro-video.com/125-variable-focal-reducer-all-systems.html 主題: 回覆： C8HD reducer 為何出現 4.3 ? VARIABLE FOCAL REDUCER 作者: peter 於 2020-12-16 13:29:10 Optec NextGEN Maxfield 0.33x C14 3910 mm 焦距 高焦比(f/11) 減到 f/3.6 https://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=25209.435 主題: 回覆： C8HD reducer 為何出現 4.3 ? VARIABLE FOCAL REDUCER 作者: peter 於 2020-12-16 13:33:04 https://www.optecinc.com/astronomy/catalog/nextgen/17403.htm
C11 + NGM 0.33X MAXfield https://www.astroshop.eu/flatteners-correctors-reducers/optec-reducer-nextgen-maxfield-0-33x-sct/p,50520 https://www.highpointscientific.com/optec-nextgen-maxfield-sct-telecompressor-reducer-17403 |