Oversampling explained like you’ve never heard before.

The astrophotography 5x Planetary Rule is wrong and dumb because of reasons and I'm here in this thrilling expose of the truth they don't want you to know.

Thanks to the show sponsor Bintel! The Binocular & Telescope Shop, Sydney

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[DylanODonnell]

Cyberskunk over on /r/astrophotography discord quite rightly pointed out that for the "critical sampling" 2x2 pixels I showed in my drawing that's actually 2x sampling, not 4x. The "5x-7x F ratio" rules push you to 3-4x oversampling, but if you want to aim for "critical sampling" which is what I believe is best, then you should aim for 2x oversampling in the calculator. Some people swear by the 7x F ratio rule (4x oversampling) .. maybe they have better seeing than me! But somewhere in that 2x - 4x oversampling ballpark is probably fine.

[bradleypout]

Great video, mate! I love living vicariously through your astrophotography adventures. Even though I can't afford all the fancy equipment myself, it's still so much fun and entertaining to watch! Thanks for sharing your passion with the world.

[ahmadhasan]

Dylan, you have explained the one concept I hated approaching and touching because it was soo confusing! Well done!! Do make sure to add something about sampling in the title so those who are looking this up know to go to your video

[TheAntibozo]

Not doing any astrophotography these days; too much tree coverage where i am. I watch your videos just to beef up my knowledge for those nights some time in the future when i get back to the hobby, but also i watch because they are just plain entertaining. 🐿

[NautilusCL]

Thanks for the explanation of the rule! I recently bought a QHY294MM, which is a deep space camera but I tried it with Jupiter just for kicks. I got very good results with my Celestron C6N! The best image of Jupiter so far. Now I want a planetary camera, do you think it is better to stick to mono or use a color camera? Considering I already have the filter wheel and LRGB filters 🤔? Greetings from Chile! (southern sky is the best sky 😎)

[ziggyfrnds]

Always a great day when Dylan uploads! I'm in sydney and the forecast says clouds for the whole week ahead :( Hope you get clear skies in Byron bay mate! Can't wait to see results with your new camera

[AstroQuest]

Thanks for the video Dylan - excellent info. If I ever do planetary, maybe in a few years, I will hav a better understanding of what the Heck is going on. I especially like your week long continous camera experiment - shows how durable it is. Cheers !

[jonservo]

It’s nice to see someone going into more depth on this. There isn’t a whole lot out there on this subject. I’m trying to find a dedicated astrophotography camera for my setup. I have a 90mm f10 refractor, and a 150mm f4 Newtonian astrograph (I got it cheap from someone in my area). I’m trying to get something to start imaging the moon and planets that can also dabble in the deep sky objects and possibly become a guide camera eventually. It’s not easy navigating all the options available, especially since there aren’t a lot of reviews on all the cameras out there. Of course I see zwo everywhere, but these qhy cameras caught my eye recently

[ericknudson]

I’m gonna check out that calculator. I was trying to learn all this a few months ago and got overwhelmed and decided to save it for a week where I had more time. Thanks for making it easy!

[Jdub]

Love the videos and calculator. It would be nice to see some of the newer William Optics refractors on the calculator though. Like the Gran Turismo 81 WIFD. GREAT VIDEOS

[martinsastrophotography]

Great video Dylan. I checked my setup….EdgeHD 11, 2x Barlow, ASI662MC (2.9um pixels)…..7x2.9=F20.3…I am at f/20. Happy days.

[spacetechtips]

I'm trying to get into planetary photography, so this is helpful. Thanks!

[wcoastsands]

The calculator upgrades are super helpful. Thanks!

[Mrpaulgs]

I look forward to your videos and enjoy the content. I have the same scope and I am trying to set up the image train for planetary imaging. What is in your image train? What is the piece that has the green lettering?

[crawfprof]

Thanks for the straight-forward explanation of oversampling Dylan. The new Bintel Setup Calculator is also excellent and incredibly insightful. It cleared up a few questions I had.

[astroskyman]

Excellent explanation, thanks for posting.

[skesinis]

This one was a real eye opener Dylan! Being on a Bortle 9 sky, I can pretty much only use my 5 inch scope just for planetary observations. Looking back at combinations I used in the past, your calculator I was oversampling up to 10x sometimes! 😂 I knew I was magnifying a blurry image, but I didn’t know by how much! On the other hand, this exaggerated magnification, helped me develop a stepper motor focuser using an Arduino, to focus accurately without shaking the scope, and some DIY vibration absorbing pads for the tripod. So, it didn’t all go to waste…

[AstroSoundscape]

This is cool information thanks Dylan, Ive been using the X5 to now so good to see this explained. BTW I think the ASI 432 camera has incorrect pixel size on the Bintel Calculator.
Cheers Ollie.

[aw]

Thank you Dr Dylan. Snowing here in Colorado, no Astro until mod next week….we hope, clear skies

[carvrodrigo]

Nice video sir!! We all were missing your tech adventures videos!