Optolong L-Ultimate filter imagers, share and discuss

Optolong L-Ultimate filter 5 replies109 views
Tareq Abdulla avatar
Hi all,

I am waiting my filter to arrive so i can use it with my color camera.

How do you mount your filter to the camera, by filter wheel or drawer or directly with an adapter or where exactly? My reducer has 2" mount to place the filter.

How do you separate the channels or bands between Ha and OIII?

If you shoot under light pollution sky [Bortle 8/9 mainly], what setting of camera do you use [Gain, offset, exposure,….]

Do you see halo? I am planning to remove stars from any NB filters channel and go with RGB stars instead, so is halo from NB filters any big deal then?
Max Kuster avatar
I mount it with a filter drawer as close as possible to the sensor. I then separate the channels using the dedicated tool in Astropixelprocessor (“Ha/Oiii extraction”). 

No halos so far on my images, shooting with a modified sony a7s and skywatcher 200PDS + baader MPCC coma corrector.
Tareq Abdulla avatar
I mount it with a filter drawer as close as possible to the sensor. I then separate the channels using the dedicated tool in Astropixelprocessor (“Ha/Oiii extraction”). 

No halos so far on my images, shooting with a modified sony a7s and skywatcher 200PDS + baader MPCC coma corrector.

Nice, thank you very much
Tareq Abdulla avatar
The filter was delivered to me yesterday smilesmilesmile
Icharuss avatar
I use this filter with my Askar refractors for EAA.  It's a challenging filter to use as I find I've had to up my game in order to get good captures in EAA timeframes (generally between 45 minutes to 120 minutes).  I prefer it to my L-eNhance - I think it gives better colors and much better response to OIII.
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Carlos Rincón avatar

Hi there, I normally do not separate channels. Instead of this, I use the process Narrow Band Normalization. It is very useful for building an HOO palette (among others). This process “normalizes” the relative intensity between Ha and OIII and allows you to regulate the contribution of each of them in your images.

For further details:

https://youtu.be/lT1fXqR82_M?si=3Nvu53Aap7MX5hva

https://youtu.be/2hSFdjYRkaI?si=-ahRCC9Qe1eunKmn

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