THE TRUTH ABOUT POLARISING FILTERS ON YOUR DRONE - circular polarizing filters on your mavic drone
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- Опубликовано: 21 авг 2024
- What do circular polarising (CPL) filters do on your drone and are they worth using? Despite what some other people may say, I believe there are niche situations where polarizing filters can make a huge difference. I test them out with my mavic mini, mini 2 and mavic air 2 over the coarse of 2 months.
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Thanks for watching and I hope to see you in the next one!
I went on a trip yesterday in fact and used the polarising filters over the ocean, I could see right through the water, it was as expected, but when I did a 360 Photo rather than expecting a transition in the sky I ended up with quite a disaster of dark and light skies, so lesson learnt that 360 photo's must not use a polarising filter but video or photos at 90 degrees as you mentioned are fantastic and as the sun was slightly on the coastal side of the coastline it made for some of the best video I have ever taken flying up and down the coast as it was 90 degrees from the sun, what I found was for best results simply point the dot directly at the angle of the sun so if it is at 11 O'clock point it there come back adjust the polarising filter for 1 O'clock and fly the other direction, this will give consistent sky colour and ocean glare penetration or simply place it directly straight up at the 12 O'clock and it will be adequate too. none the less I was able to see blue's and green's in the ocean and the rocks up to 10 metres deep.
Sorry I carry on so much, I use to use only ND filters and still do primarily for the 180 rule ie: 4K30 then shutter at 60 and if I need more like really bright day and the ND32 doesnt cut it I then increase to 4K60 and 120 shutter and that is with no clouds and mid summer so I might just buy a ND64 and ND64 with polarising to add to my collection.
None the less it's trial and error to see what you want from it, sometimes clouds in reflection are a good thing like a muddy river.
Anyway you explained it clearly for most to understand, I know how it works but looking for other solutions and suggestions as well, and you re-enforce what I understood from before.
Thanks for this info! I will pin. I am sure people will find this useful.
Great point with the 360 degree photo I didn't think of that, but it would be great to demonstrate the difference.
Keep us updated on how you get on. They are really fun play with 😊
Thank you, this was very useful. One correction from a physics major. Rotating the filter does not turn it off. It changes which polarity of light is being removed. Light is an electromagnetic wave where a change in the electric field drives magnetic field changes amd then the magnetic field change drives the electric field. Conservation of energy allows it to travel accors the universe. These two fields are at 90 degrees from each other and if you could look at it end-on you would see it shaped like a capital letter L. One direction electic and the other magnetic. The angle you would see the L at is completely random when it comes from the sun, no light wave oriented to the others. When sunlight hits water the light reflacted is all at the same angle, hence it is called polarized. This is why the normal position in outdoor photography is the same. The sun is up and the water down. If the light source moves to the side or down or the reflective surface moves to the side or up you need to rotate the filter to get the new angle of glare. One fun thing to do is look through two filters at the same time. If you rotate them relative to each other, it will change from a regular polarization effect (when both capital L's are alligned) and completely opaque when they are opposite. The whole thing reminds me of the child's PlayDo extruder pushing out an L shape that twists as it comes out.
I just though of an example. If the sun is on the horizon and you are shooting a glass skyscraper you could rotate the filter 90 degrees to reduce glare.
Thanks Thomas. That is great info. will try that out!
When i was researching ND/PL filters back in the summer for my mini i found the information out there was hit and miss. This is by far the clearest, easiest to understand explanation i have come across, which i feel is very important to understand, especially if you are observing the 180-degree shutter rule. Thanks Paul.
Thanks Daniel! Glad you found it useful!
This is the best video on polarising filters bar none! Your photography experience shone through 😆🙃
Q. When you get the chance, can you show the effect over snow and an expanse of ice?
I get very little time to film it where I live because it's often too foggy on the few days each year when I get the white stuff.
Thanks Lindsay!
It took me a second read to get that pun 😂🤣
I wish you had said this 2 days ago! I have just shot a snow tutorial and didn't even think to compare that!
The snow here is now gone, but when it returns I shall make one. Even if it is in a year or two 🤔
I've watched a few vids on ND filters and polarised filters and now I understand thanks to the way you explain things. Cheers Paul. ATB Pete
Thanks for the feed back Pete, knew it wouldn't be my most popular video, but felt it important to cover.
This is the best explanation and demonstration of these filters I have found so far! Thank you. And being in NZ I really liked you awesome photo at Wanaka!
Haha, thanks David. I had never heard of until I saw it. Absolutely loved New Zealand!
Thank you for sharing this, your demonstration offers a good way to understand this subject. thank you.
Thanks Dante!
Nice one there.. although it's two years ago. but still current info. Make sure you use a cleaning soft tissue to clean and or wipe the glass .Guess it's not anti scratch though.
Brilliantly clear video! Really great comparison
Thanks Alex!
Brilliant. I've ordered the freewell CPL for my mavic mini. 👍🏽
Nice one! You'll love it!
Great explanation and examples thanks. So I wondered is it worth buying a pack of Freewell ND and a pack of NDPL. Or is it better and cheaper to buy just the NDPL pack and “switch off “ the PL element when not needed by rotating outer ring by 90 degrees ? Or does Thomas’ physics comment above mean that it’s never really “off” when turned at 90 degrees?
Very interesting Paul. Thank you. Jim
thanks Jim!
Great video Paul! The links seem to both go to the air 2?
Sorry, thanks for letting me know, I have updated the link so it should be correct now!
being a 2.8,ND filters are necessary to get the setting right for motion blur on a bright day
You should use freewell ... much more natural colors
Absolutely
Thanks for the explanation…very informative! Are all ND/PL filter operations the same? Ex: marks lined up = max polarization…90 deg off = no polarization. I have Skyreat ND/PL filters and want to make sure I’m using them properly. Thanks!
I am not sure. I would test the reflection on some glass to make sure and go from there...
🙂 Interesting video 👍
Im heading over to the Cook Islands for a holiday soon. Im taking my Mini 3 Pro with me and was considering getting a polarizing filter. Given that most of the footage I'll take will have lovely blue, clear water in it, do you think it would be worth getting one to use while there?
It would certainly be a good time to experiment with it.
I personally would prioritize the ND filters, but if you can get ND polarizing filters I would certainly go for that.
I use mine nearly everytime I fly.
@@paul-thys So what sort of situation would I use a ND filter and can I just leave it on there permanently? The set I've found has ND8/PL, ND16/PL, ND32/PL. Does the ND filter reduce overexposure?
Nice! Keep it coming
Thanks! Will do!
Hi , Informative video mate . after watching some videos , most detailed ones about polarising filters are not for drones but normal cameras , one guy said not to be used at night as they stop a bit of light . ( equivalent of reduction of ND 2) I see you have the hybrid filters .
I’d like to know if the hybrid filters are ok at night , Or is there any time when polarising filter is a bad idea . I’m in two minds whether to get the free well all day pack or sunny day pack with hybrid filters as I understand .
Any advice I’d be grateful for . I live in UK so you know the weather we have . Apart from recent heatwaves it’s rare we see the sun ! Thanks
At night I would take the filter off as you will not need to reduce the shutter speed.
CPL will reduce reflection in water and glass, so if you want to maximise the reflection around a glass skyscraper or over a lake the CPL filter may not be the best idea. Also when shooting at 90 degrees from the sun in a blues sky it will make the sky look slightly darker.
What is the purpose of using ND for short exposure photos?
It's for long exposures on photos and to lower the shutter speed on video.
You can use it for short exposure photos. If you want to use the maximum aperture of your lens, in a bright sunlight day, and you want motion blur of moving objects (like cars), you need a ND filter, because the amount of light if too high. A good example: a person portrait with blurred background and cars passing behind the subject (if you want the cars with motion blur, you need a ND filter)
Sir, is nd+cpl filter decrease any quality compared to nd filter only?(Talking about freewell)
Not that I have noticed.
Great 👌
Thanks man!
So it means that ND 16 PL with CPL off will be the same as ND 16?
Or there is more difference?
So why freewell sells kit with both ND and NDPL together when you can just use the NDPL with CPL off ?
I need to know if i should go for the full kit or can i just get ND 8/16/32/64 PL and turn the CPL on / off ?
I'm very confused and not even one youtuber talks about it ...
Yes it is an ND and a CPL filter so you can get a ND CPL and use it instead of an ND. That is what I do.
@@paul-thys
Thank you, helped me a lot, anyways i already bought 2 packs of skyreat, ND and NDCPL :)
Hello, tell me, in the variable PL there is no parasitic glare due to the fact that it consists of two glasses? Compared to a submarine without a slewing ring?
Can I turn off the polarization of ND/PL filter? If so is the colour off then when turned off?
It depends on the orientation of the light, so will change depending on the light source. So it can't be turned off, but the effect can nullified at the right angle.
The marker is there to show how far it has turned and the on/off effect will change depending on angle of the light. So the only way to see where it needs to be will be to look through and adjust it on the ground before sending up the drone.
@@paul-thys Thank .. I was hoping to turn the filter away from the recommended marking to turn off the PL so that I could use it as a normal ND if needed when doing a Panama etc..
@@michael_hahnell You can, you just won't know the orientation of the light so won't now when it is 'off' unless you turn it whilst looking though the camera.
Are they the stepping stones at box hill? looks so similar
They are indeed!
@@paul-thys Nice! I thought so, great place for some shots
@@vRxUniQueZ Yes, Box hill is beautiful!
Nice...👍.
Thanks again Barney! 😊
Which brand is better? Sunnylife or Startrc filter?
The Startrc filters can come with CPL filters too, but in terms of quality I don't really notice a difference?