M17
發表於 :
2010-08-09, 19:36由 benben88
Hi all,
Photo for sharing , details:
Tak E180 ED, P2 + V4 filter , ST2000XM (self guide), L 120s X18, R 120s X2 , G 120sX2 , B120s X3 (RGB 2x2 binning).
Taken on 1 Aug at Yuen Long.
Ben
Re: M17
發表於 :
2010-08-09, 21:02由 社長
恭喜Ben把Epsilon調好了，是手動或電子輔助調焦的? 我去年也感受到Epsilon的高速，但就是發現不容易處理光軸及調焦問題，最後放售了。
奇怪若用上了V4便不再需要用P2了，有何緣故要疊加?
Re: M17
發表於 :
2010-08-09, 21:10由 Nebulas
社長 寫:恭喜Ben把Epsilon調好了，是手動或電子輔助調焦的? 我去年也感受到Epsilon的高速，但就是發現不容易處理光軸及調焦問題，最後放售了。
奇怪若用上了V4便不再需要用P2了，有何緣故要疊加?
好作品，
特别在Film时代，F<3能看得出Epsilon很卖力的。
Re: M17
發表於 :
2010-08-09, 23:14由 benben88
社長 寫:恭喜Ben把Epsilon調好了，是手動或電子輔助調焦的? 我去年也感受到Epsilon的高速，但就是發現不容易處理光軸及調焦問題，最後放售了。
奇怪若用上了V4便不再需要用P2了，有何緣故要疊加?
Manual focus with Bahtinov mask. Just try to see the result of the combination of the filters , don try , we never know the result
Re: M17
發表於 :
2010-08-09, 23:20由 社長
V4 stacking with a P2 filter is still a V4 filter, may be you lose a few percent transmission at Ha
One thing worth trying is stacking V4 filter with deep red filter that cut off below 650nm, then you got a not-too-narrow band Hydrogen Alpha filter.
http://www.sciencecenter.net/hutech/haimage-v4.htm
Re: M17
發表於 :
2010-08-09, 23:35由 benben88
社長 寫:V4 stacking with a P2 filter is still a V4 filter, may be you lose a few percent transmission at Ha
One thing worth trying is stacking V4 filter with deep red filter that cut off below 650nm, then you got a not-too-narrow band Hydrogen Alpha filter.
http://www.sciencecenter.net/hutech/haimage-v4.htm
But also cut more unwanted light pollution as both filters are not 100% cut .... there is always trade off in our life.
Re: M17
發表於 :
2010-08-09, 23:44由 社長
ok....
so do you really see some difference?
