M17

[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

[Lewis]

[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?

[Nebulas]

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。

[benben88]

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

[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

[benben88]

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.

[社長]

ok....

so do you really see some difference?