Astrophotography from the CITY: 7 Tips to Image Under EXTREME Light Pollution!

[@Talalpro_1]

Bortle 9 is scared now

[@GalacticHunter]

😂 It better be!

[@jimmison]

I just wanted to make some corrections with the DSLR noise topic. If you have an ISO invariant sensor, shooting at different ISO values will not effect noise levels. Most cameras actually have a higher sensor noise at low ISO values. The main advantage of shooting at a low ISO is higher dynamic range which prevents bright stars from blowing out.

[@TheNarrowbandChannel]

Noise goes down as you switch to Higher ISO. but Dynamic range will also go down. So from light polluted sky where you need a lot more dynamic range. Darker sky I use a Higher ISO or Gain.

[@GalacticHunter]

Oh wow thanks James, had no idea about this!

[@astrodad656]

03:58 ...noise. Love the "noisey" edit. Slick.

[@pierrechticumulus6241]

Une vidéo que j'attendais ! Merci à vous deux pour ces conseils judicieux. Bonjour de France et bon ciel à vous !

[@GalacticHunter]

Merci beaucoup Pierre !

[@ChrisM541]

02:31 I'd suggest the primary reason for not willing/able(!) to go monochrome is the very significant extra cost of going monochrome + filters +++'hidden extras'

[@Sirhaian]

This was very informative, thank you!

[@MoggioMTB]

I have low level, crap equipment; pretty dark skies and cold temperatures but still learnt some useful things from this video. Good stuff.

[@Wheeljack678]

Great video. My experiences with the L-Pro is the complete opposite of yours. I live in a suburban bortle 5-6, surrounded by streetlights and I image with long lenses / telescopes and DSLR. I bought the clip-in version of the filter and the images I got back with the filter was a huge, huge improvement over shooting un-filtered. Practically no gradients and a much cleaner and prettier result. I have two of them - One for my full frame DSLR and one for my crop-sensor ha-modded DSLR. Great point about dithering. I didn't really realize just how important that is until I had a near-perfect 4-hour session on Markarian's Chain completely ruined by walking noise.Paranoid as that made me, I now dither after every frame, but as you said; that is probably a waste of time. When the nights become dark enough to do AP again, I'll increase the interval to every 3 frames and see how that goes.

[@GalacticHunter]

Interesting, the L-Pro definitely is a popular filter and lots of people love it so it probably is a good investment. We only tried it for a couple nights, maybe we should try it again and do an actual comparison

[@jrags35]

Why do you keep watching the Galactic Hunters ? Straight up unbiased advice like this. These are two people that love the hobby and truly wish to help others. Thank you both for all the tips and the support even with the Galactic Hunter course, can’t wait for the new season to start up!!!

[@GalacticHunter]

Thank you so much for all your kind words 🥰

[@fazergazer]

Very nice! I would call these tips “pearls” in fact!

[@GalacticHunter]

Haha, maybe I should rename the title to "7 Pearls to Image Under EXTREME Light Pollution!" 😅

[@TheNarrowbandChannel]

I am glad you brought up the SO common misconception that it takes longer to capture in image with Mono. Really you will get twice as much detail using a mono camera in the same amount of integration time.

[@lukomatico]

Hey guys! Great video, absolutely full of tips! :-) I hope your skies are clear and you are getting some imaging time!

[@tacomaastro7462]

side note for dark frames with a Nikon DSLR... Cover the view finder when taking dark frames, any direct light on the view finder will show up in your exposures. Great tips... Clear skies

[@billvinson7859]

I loved your Thor and Valkyrie costumes. Good info for your video.

[@ajitsharma04]

TBH...only one person can explain this since these videos are explanatory. I don't want to come out wrong but I think if he explains the details and she does other work, that would be a great collab. Love your videos.

[@leonardoleite1085]

Great video! Great tips! Thanks!

[@seanmolony-redstickastro238]

Well done y'all. I live in a bortle 9+ city and switched to Narrowband 4 years ago and never looked back. I'm using QSI690 & QSI683 monochrome cameras with 3nm Astrodon Filters. All my images are shot at 27x1200. I'm currently testing the newer color cmos cameras with various LP filters and although harder than Narrowband I'm beginning to get decent images. Although I'll never stop Narrowband. Great video. Sean

[@gooe9561]

I image from Bortle 9. I bought an L-extreme and a triad quad band. I recommend imaging with no filter. Both filters had odd things about them that I did not like. With enough integration you can get good images from heavily light polluted areas. But from Bortle 9, in reality, to get great looking images you're going to be looking at dozens or even hundreds of hours of integration. With my monochrome camera I can get amazing images from home, but only in narrowband. I have yet to invest the huge amount of time in broadband targets at home. I do have access to a darker site, Bortle 4-5, and use that for my broadband targets.

[@jrags35]

I am in Bortle 4-5 sky, and use both a 294mc and 533mc pros, on a 8 inch newt and 72mm refactor, when the moon is out or, my neighbors choose to leave the flood lights on all night I use the L-extreme and have have very good results.

[@gooe9561]

@@jrags35 Glad it works for you. I noticed bloating around stars and a hue balance that I don't care for.

[@spookydonkey2195]

I’ve always shot with a filter from my bortle 8 yard but you’ve inspired me to try the short exp technique this summer. I was spoiled by a trip to dark sky last fall, this gives me motivation to hit the yard. 👍

[@GalacticHunter]

Best of luck!

[@avt_astro206]

Great Tips!! Im Bortle 8!🌌

[@stay_at_home_astronaut]

Whew! $1,075 for the Radian Triad Ultra filter? That is pretty expensive.

[@chrisv.6951]

Anywhere there is light, there is life !

[@NoahsAstrophotography]

Great video guys! Really well done! The intro is so true unfortunately 😢 Its really sad thinking about the negitive effects of light pollution, wish it could be different.

[@GalacticHunter]

Thanks Noah! Yep light pollution is terrible and getting worse and worse. We're thankful to live on the West Coast where there are still a lot of unpolluted land

[@MDezanGlasovic]

Its coming from ny search, glad found this

[@jameswebb8162]

It’s a real shame Vegas lights are so aggressive! At least you have the desert to embark on your deep sky adventures. Amazing video!!

[@jesuschrist2284]

I used 1600 iso and it was very green. Will try much lower ty for this

[@BackyardObservatory]

Las Vegas: Bortle 9? I'll show you Bortle 9000!

[@firefrogs2464]

Hi, i have a Canon EOS 2000D that has a maximum ISO of 6400, the noise is a bit too much and i wanted to set it to 3200 or even 1600. My question was if it will affect the final result of the image, will i get the same nebula/galaxy details with a lower iso?

[@firefrogs2464]

I shot without a tracker so maximum 1" of exposure

[@Mohdaman13]

In low light pollution 1600 is the way to go, while in high lp you should go lower. Just raise the exposure and stack several images, you will get the same signal but with much less noise and gradient!

[@rohitnair2360]

Great video!! What's the retro synth-wave song playing in the background?

[@GalacticHunter]

Thanks, and woops, I keep forgetting to add the song names to the description, added now. It's "Dissonance" by "De Lorra"

[@Morningstar007k]

In India we use led's as street light how to block the light of leds ? 🤔🤔🤔 Like if I try to capture a minimum of 30 second exposure at 100 iso at 1.8 or even 2.8 all came out a OVER EXPOSED WHITE MESS 😭

[@gooe9561]

I wanted to add, I have to use bias frames with my ASI2600MM in order to get my flats to work properly. Also, I take 30 flats and 30 darks.

[@GalacticHunter]

That would be Dark Flats, similar to bias frames but not quite the same since the exposure time matches the exposure time of the flats

[@Mistr_A]

OSC astronomical camera with the L-Pro works extremely well

[@FisTheDucc]

im in bortle 4-5 but i still watching this;D The reason why ur target looks not that good as without a filter is because filters doesnt bring anything on a galaxy because they are shining in all wavelenghts

[@denodan]

Even in normal photography black and white is still superior, can be sharper and better contrast over colour, for a colour camera in light pollution if not using a mono an L extreme is the one to get for Nebula. I do EAA on my Qhy 163c and use the L extreme filter and a massive difference

[@boarini2003]

I'm visual only and I live in Las Vegas. The light pollution is horrible but dark skies are close by. I hope that Astrophotographers will care as much about light pollution even though they can get around it. It will be sad if we lose our reasons to look up in wonder.

[@onewhostudies6856]

i have an idea: kzbin.info/www/bejne/oKOkXmSZfMSqp5Y

[@talhaoz2640]

Dang I learned alot!

[@jayerjavec]

...I agree with the problem of light pollution. Did no one notice something far more disturbing in so many ways? Starlink.

[@barrymak421]

Shooting from bortle 8/9 you will be taking so many subs that stacking will wipe any sat trails. Dark sight yes it's more of an issue simply because you have a smaller number of subs with long duration.

[@02emma1]

Fantastic video ...but I'm confused. I live for Bortle 8 in UK. I want to shoot broad band galaxy such as M51 with asi533 osc but not sure to get use duo band filter or not? Any suggestions please.?

[@peterschmitz4308]

Hi from Texas, Paul. I'm in a Bortle 5 and M51 comes out much better without my L-enhance duo band filter with the ASI533MC pro. I'm only using the duo band for emission nebula. All my galaxies I shoot without a filter.

[@02emma1]

@@peterschmitz4308 thanks Peter. Clear skies!

[@404_pagenotfound7]

Just my 2 cents. From my experience i would recommend using shorter exposures and stack more frames if 1) you are living in a city and 2) you are using a cmos camera, and 3) your pc is capable of handling giant data set. Seeing is usually pretty bad in cities because of the temperature difference etc. You can take many frames and stack only the best of them, and the result will be better than stacking everything. Jon Rista from CN also posted a test he did with the asi1600mm which showed that the difference is minimum between more frames and longer exposures (well, before over exposing of course ;)

[@s5hanom979]

How short should the exposure be?

[@404_pagenotfound7]

@@s5hanom979 that’ll depend on your setup. There has to be enough useful photons, but not too long because you want to get enough frames and toss out bad ones (kinda like lucky imaging). I’ve done 5-60 seconds but just by guessing it i think anything above 1 second should work

[@s5hanom979]

@@404_pagenotfound7 oh ok I mostly take like 5-10s but never stacked images I will try it when there are no clouds

[@ndzick718]

I've been yelling at clouds for about a year now, and this video is everything that I needed to see back then before getting started outside of Cleveland, Ohio (Bortle 7). Are broadband targets even an option for a mono camera? Thank you both for all of your great videos and information.

[@Sarimae23]

My biggest problem ? The ligtpollution in the focus of the Objective :-/

[@techworld8961]

Which telescope do you use?

[@rufigamerz916]

18mm to 55mm basic Lens is good for astrophotography

[@johnadastra1754]

Yes, L-Pro sucks out too much of the nice colors in OSC leaving more of a dullish mono-chrome look. CLS-CCD filters do a better job of just rejecting the light pollution. :>).

[@jean-francoistafanelli2401]

je ne peux rien vous donner l'article est en anglais , tafanelli jean

[@gilgemash]

What's a "bortle"? From a curious Londoner 😷🌈

[@GalacticHunter]

It's the scale used to measure light pollution, Bortle 9 is the worse (city, lights everywhere), Bortle 1 is the darkest/best (desert, sea...)

[@gilgemash]

@@GalacticHunter aha.... Thank you. I should let the local powers, city council, in London, know about this. They have no respect for curious Earthlings on London streets, who are struggling astronomers, skywatchers. They pump it all up, to Bortle 9 or more than that...i would say. High pressure streetlamps and I say nothing of the awful vehicular high intensity beams and even side lights. Blinding. I feel it adds up to bortle 18 at least. Thanks for heads-up on a bortle. And for sharing your video/s. Lovely. Love to you all 🙏 from London 😷 🌈

[@oupwo7468]

You sound French! I am from France

[@arnaudmalleval9276]

Ou sous titré en français ça serait cool aussi !!

[@oupwo7468]

@@arnaudmalleval9276 je confirme !

[@GalacticHunter]

Oui je suis Français 🥖

[@oupwo7468]

@@GalacticHunter Énorme ! Ça me donne encore plus envie de regarder.

[@kevanhubbard9673]

Looks a dreadful place to stargaze! I'd say that you would be restricted to the Moon,planets,brighter double stars and obviously the Sun during the day.I'd move! it's amazing that those in power tell us not to leave of TV's on standby to stop wasting electricity but allow whoever owns those places in Las Vegas to pour all that muck out into the sky.I've never had the dubious pleasure of visiting Las Vegas but I have been to Singapore and Hong Kong which I think are two of the most light polluted cities on our planet.i did a bit of first magnitude star gazing with my monocular, Canopus, Alpha Centarui,Acrux,etc with my monocular from Canning Park, Singapore but then a laser light show started and I gave up!

[@billvinson7859]

Or was it Lady Thor?

[@DrNat1]

🤔

[@onewhostudies6856]

1:31 WTF BELGIUM!?!?!? WTG AUSTRIA!!!

[@RajashreeMalakar-x9g]

I have mobile

[@viniguez487]

DITHER OR DIE!!!

[@bamsemh1]

Title says astrophotography. Video shows 10 minutes street photography 🤦‍♂️

[@bennybooboobear3940]

??... astrophotography is still astrophotography... what’re you on

[@bamsemh1]

@@bennybooboobear3940 read again. Video shows streets! Not astrophotography! 🤦‍♂️

[@wilcojuffer5940]

Astrophotography from the CITY: so I do not know in what city you live but here where I live thear are a lot of streets

[@bennybooboobear3940]

@@wilcojuffer5940 LOLLL