I love your videos, you're not gimmicky or like you're acting. You deliver the information clearly, with as much detail as possible, without a lot of fluff. Please keep this format up!
A good informative video thanks. I will be revisiting this one to note the important details here. Please more information about combining if you will .
Very nice vid - quick, to the point. I live in severe light pollution. My mono camera + LRGB + 7nm narrowband, really struggle. Have the L-Ultimate 3nm dual pass on preorder - it will make for a very interesting comparison using my OSC ( same camera models )
HI , i liked so much your videos , but i have a question i use fast telescopes and i do monochromatic images . in HA alpha the focal length from F5 TO 2.8, what H ALPHA filter is good for 3nm or 5nm or 7nm my heavens is borthle 8? i'd appreciate you help
Would you think a narrow dual band 3nm filter (like the Optolong L-Ultimate) will work in my set-up? (Modified DSLR, 600mm F5.4 telescope, equatorial Goto mount) Any others who have an idea?
Thanks for your very to the point useful tips and explenations! I am currently imaging with a modified dslr and the optolong l-eNhance from a bortle 5 location. In the fall I will have access to a bortle 3 location in the mountains (Norway). I am considering the Zwo 533mc pro and the l-extreme version. Apart from light pollution, will more narrow bandpasses also produce better contrast in low light pollution? My worry is a lot of talk about star halos for the l-extreme variant. Thanks, and clear skies!
Assuming the same in band transmission of the filters. The object will be the same brightness. Eg. with a Ha filter, the HA region will be similar in brightness but in the 3nm everything else will be much fainter due to the narrower band pass. So stars, background sky, etc will all look smaller/fainter. This will increase the contrast. The 3nm will then allow you to image for longer before clipping the stars, etc if you choose to do so.
Can you make a video showing how to calculate the spectral resolution of a given telescope? What parameters do you need to know to calculate what range of the electromagnetic spectrum a lens can capture and differentiate between frequencies? How do you calculate what those frequencies are for various lenses?
For any beginners to narrow band I recommend the SVBONY220 it’s a H-alpha and O-iii dual band filter whith an OD5 for only $125
I love your videos, you're not gimmicky or like you're acting. You deliver the information clearly, with as much detail as possible, without a lot of fluff. Please keep this format up!
I keep procrastinating on creating my own videos while watching great content like this ;-) Thanks!
lol... same!
Here, here! Narrowband imaging is such an amazing approach to astrophotography. So powerful! Thanks for another great vid! Cheers
Agreed! I love narrowband, it really makes imaging from the city much more enjoyable.
A good informative video thanks. I will be revisiting this one to note the important details here. Please more information about combining if you will .
Very helpful.
Thanks
Another Greta lesson. Thank you Rowan.
My pleasure!
Very nice vid - quick, to the point. I live in severe light pollution. My mono camera + LRGB + 7nm narrowband, really struggle. Have the L-Ultimate 3nm dual pass on preorder - it will make for a very interesting comparison using my OSC ( same camera models )
Thanks Roro.. very useful video thanks. Ah AP is such a complicated hobby
It is, but would we have it any other way? I find half the enjoyment is trying to master the difficulty.
@@AstroWithRoRo very true.
Very nice summary! Well done!
Thanks Cuiv!
HI , i liked so much your videos , but i have a question i use fast telescopes and i do monochromatic images . in HA alpha the focal length from F5 TO 2.8, what H ALPHA filter is good for 3nm or 5nm or 7nm my heavens is borthle 8? i'd appreciate you help
Yes more please, narrowband with OSC is the way to go for me in cloudy UK with ;limited imaging time.
Good stuff Rowan, Now to just wait until the stores have these things in stock!
great video
nice explanation! easy to follow.
Glad it was helpful!
Interesting. Just subscribed.
Would you think a narrow dual band 3nm filter (like the Optolong L-Ultimate) will work in my set-up?
(Modified DSLR, 600mm F5.4 telescope, equatorial Goto mount)
Any others who have an idea?
Thanks for your very to the point useful tips and explenations! I am currently imaging with a modified dslr and the optolong l-eNhance from a bortle 5 location. In the fall I will have access to a bortle 3 location in the mountains (Norway). I am considering the Zwo 533mc pro and the l-extreme version. Apart from light pollution, will more narrow bandpasses also produce better contrast in low light pollution? My worry is a lot of talk about star halos for the l-extreme variant. Thanks, and clear skies!
Informative video :)
so can I say, shoot with the same exposure times as I do with the 7nm or would 3nms take a longer time to collect the same number of photons?
Assuming the same in band transmission of the filters. The object will be the same brightness. Eg. with a Ha filter, the HA region will be similar in brightness but in the 3nm everything else will be much fainter due to the narrower band pass. So stars, background sky, etc will all look smaller/fainter. This will increase the contrast. The 3nm will then allow you to image for longer before clipping the stars, etc if you choose to do so.
Can you make a video showing how to calculate the spectral resolution of a given telescope? What parameters do you need to know to calculate what range of the electromagnetic spectrum a lens can capture and differentiate between frequencies? How do you calculate what those frequencies are for various lenses?
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Ant - lee - ah... not Ant - ill - uh