TheSkySearchers

Juno16 wrote: ↑Wed Oct 13, 2021 10:58 pm Hi Chris,

You are shooting OSC and there sure are some options.

I get marginal results when I shoot broadband even with a lp filter (I use a IDAS LPS D-1 as it works well with Na vapor lighting).

With my Optolong L-eNhance, I get pretty decent results (to me anyway) even with a very bright moon.

A recent image of the Heart nebula imaged over two partial nights with a 95% and 90% illuminated moon.

I have heard that the Optolong L-eXtreme is even better, but I am happy with the results from the L-eNhance.

Juno16 wrote: ↑Wed Oct 13, 2021 10:58 pm Hi Chris,

You are shooting OSC and there sure are some options.

I get marginal results when I shoot broadband even with a lp filter (I use a IDAS LPS D-1 as it works well with Na vapor lighting).

With my Optolong L-eNhance, I get pretty decent results (to me anyway) even with a very bright moon.

A recent image of the Heart nebula imaged over two partial nights with a 95% and 90% illuminated moon.

I have heard that the Optolong L-eXtreme is even better, but I am happy with the results from the L-eNhance.

chris_g wrote: ↑Thu Oct 14, 2021 1:42 am
Opt has all three charts on one page, making it easy to do the comparison

https://optcorp.com/products/optolong-l ... ter-2-inch

I looked at the L-Enhance and the L-Extreme, the L-Extreme actually block the blue and orange wave lengths where as the L-Enhance blocks just the orange. I remember now why I chose the L-Pro over the L-Enhance as it lets in more color in the higher end of the visual frequency range, orange and red, I do like color. I believe the L-Extreme would most likely block the Seven Sisters and their reflection nebula as they transmit primarily blue.

After reviewing those charts again, I think I would go with the L-Enhanced for imaging DSO with a bright moon in the sky. It's amazing what I've learned these past few months and I know I've only just begun to scratch the surface, thank you. Now I also understand what APT means by NB Time as it starts at astro-twilight end. Narrow band filters are blocking the moon's light was well...

Right now, I think I am going to try an imaging run in full moonlight on the Seven Sisters using the L-Pro with the same exposure and number of images as I did last time and see how it turns out, those were taken with no moon in the sky. Experimentation!!!

Juno16 wrote: ↑Thu Oct 14, 2021 2:04 am

chris_g wrote: ↑Thu Oct 14, 2021 1:42 am
Opt has all three charts on one page, making it easy to do the comparison

https://optcorp.com/products/optolong-l ... ter-2-inch

I looked at the L-Enhance and the L-Extreme, the L-Extreme actually block the blue and orange wave lengths where as the L-Enhance blocks just the orange. I remember now why I chose the L-Pro over the L-Enhance as it lets in more color in the higher end of the visual frequency range, orange and red, I do like color. I believe the L-Extreme would most likely block the Seven Sisters and their reflection nebula as they transmit primarily blue.

After reviewing those charts again, I think I would go with the L-Enhanced for imaging DSO with a bright moon in the sky. It's amazing what I've learned these past few months and I know I've only just begun to scratch the surface, thank you. Now I also understand what APT means by NB Time as it starts at astro-twilight end. Narrow band filters are blocking the moon's light was well...

Right now, I think I am going to try an imaging run in full moonlight on the Seven Sisters using the L-Pro with the same exposure and number of images as I did last time and see how it turns out, those were taken with no moon in the sky. Experimentation!!!

Chris, you might have mentioned this before, but is your Canon astro modified?

Juno16 wrote: ↑Thu Oct 14, 2021 2:46 am Ok. Good to know.

I didn’t think of asking you about mods when I was talking about the L-eNhance and L-eXtreme. Both filters probably wouldn’t be a good choice without a Ha modded or full spectrum sensor.

Star Dad wrote: ↑Thu Oct 14, 2021 6:47 pm I'm amazed that you get such good images with a near full moon, Juno. I will have to try doing some nebulae next full moon. <chuckle> Inevitably, full moon = clear skies and new moon = total clouds. Of course lately its just been clouds. My one nights use of the L-enhance filter showed me its possibilities but I used it when the moon was not yet up over the horizon.

Check the charts on the L-Enhanced and L-Extreme, every wave length is blocked except for a very narrow band, would also block the vast majority of the moon's reflected light from the Sun up in the yellow and orange, unlike my L-Pro. APT has a time allotment in the app called Narrow Band time. It starts at astro twilight end whether the moon is up or not. Makes sense.

Star Dad wrote: ↑Fri Oct 15, 2021 1:32 pm

Check the charts on the L-Enhanced and L-Extreme, every wave length is blocked except for a very narrow band, would also block the vast majority of the moon's reflected light from the Sun up in the yellow and orange, unlike my L-Pro. APT has a time allotment in the app called Narrow Band time. It starts at astro twilight end whether the moon is up or not. Makes sense.

Are you referring to this app: https://play.google.com/store/apps/deta ... n_US&gl=US

To image or observe a faint deep sky objects is needed to use the darkest time of the night. This is the time between the evening astro twilight end, the morning astro twilight beginning and when the Moon is below the horizon. In APT that time is named DSD Time - Deep Sky Darkness Time. If the imaging is through narrow band filters, the Moon is less significant factor and important is the time between the astro twilights. This time is named NB Time - Narrow Band Time.