2024年11月3日 · Run OSC_Extract_HAOIII script for photos from each filter (Ha/OIII and SII/OIII filters) separately. You'll need separate folder structures for each filter with your Bias, Dark, …

Here is the narrowband data for NGC1491. This is Ha, OIII and SII data taken through 3nm Astrodon filters. Here you can see that you really do get different structure and detail coming …

2024年12月4日 · Best way is use a very narrow HA/Oiii dual band filter (Altair is 4nm, Player One is 3.75, I think), and a narrow Oiii/Sii dual band filter (I like the Altair for both). Then use …

2024年10月31日 · Just tried expressions for three channels: Ha/Sii/Oiii. Worked quite well producing the output similar to Foraxx Utility but not as red. However, I tried to process same …

2012年1月5日 · If the SII image is relatively weak and Ha is not saturated, as often happens, one can improve the rendition significantly by altering the expressions to remove the saturation …

最常用的窄带滤镜（narrow bandpass filter--NB filter）是Ha（656.3nm），SII（671.6nm），OIII（500.7nm&496nm）,这是根据星云的发射线而设计 …

The technique described below accomplishes these goals by creating a novel synthetic green channel ("sG"), by using data from Ha and OIII. I refer to the final color composite as …

2023年8月10日 · The simplest combination is R=Ha, G=Oiii, B=Oiii. But you can use different blends. For example, R=Ha, G=0.3*Ha+0.7*Oiii,B=Oiii will make the Ha orange instead of red.

The Antlia ALP-T Dualband 3nm Ha&OIII Filter is a dual narrowband filter, which lets the red H-alpha (656.3nm) and the blue-green OIII (500.7nm) lines through and is primarily engineered …

The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolates the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical …