[Review] Polarized LED Ring Light HDR-70W-MP for Microscopes - Page 1
Forum section: electronics / general

author: sn4k3
author_rank: Frequent Contributor
timestamp: September 17, 2018, 04:56:24 pm
content: First take a look at a inferior product:https://www.eevblog.com/forum/reviews/(product-review)(junk)-microscope-polarizer-78-led-ring-light/msg1391611/#msg1391611Before this i had a normal cheap 144 led ringAt a cost of 220 EUR i take a shot at this, i was sick of glare and had to put board at a angle to able to read references, this of course is a pain with big boards like laptop MB, you had to ajust focus height and whatever.The previous polarizer i post on first was trash, kinda of cheap and use crap plastic. So this time i ask seller if the HDR-70W-MP polarizer was made from glass or plastic, he told me glass, he is right.I received this amazing product today and already test and want to show it to you, if you suffer from same problem is a good investment for your eye.1) The package is normal, not over protected nor the otherwise, if you shake package theres nothing to hear.2) The lens come with a bit of dust, nothing serious, easy to wipe, much better than fingerprints or scrath's.3) It contain two optional lens, without them it work just as other led ring, one len for the scope len and other for the lights, both are made from glass and polarized.4) center len just fit on slot without a snap fit so if you turn it over it will fall, but as soon you screw the ring to scope it will not move or go anywhere.5) Led polarizer is very handy and easy to operate, at first i saw the screws and think: oh no, now if i want to move the ring i must unscrew and screw... Well thats not true, as soon i take out the screw i notice a spring inside, the spring is there to push a metal ball that make a snap fit of ring and able to rotate 360º freely, that also make some friction that mean it will not move alone.6) The screws that hold the led ring to the scope are well made, the tip is made from plastic and not metal, that will prevent you scrath your microscope len plastic, but anyway i use a protector.7) The charger come with a lock adaptor the only downside is they make contact by touch a metal, not the best but for this aplication and current is OK. (24v 500mAh)Results are awesome, quality much better than before, able to remove glare even from liquids and the eye quality seens much better, deeper color.9) No focus issues or blur caused by polarizer len10) The power switch is small and require some pratice to get it on and off quickly11) The Brightness konb is also small but it's at the back still is not that important as i use always at max brightness, no need to change everytime12) LED Ring become warm after some use, that's not a problem, the leds are bright and i was using it at max intensity13) Overall this is a well built product and not chinesse crap, the plastic tip at screws are a good evidence that they are doing this right, it worth every penny for me.It seen that aven tools is reselling this stuff:https://www.digikey.pt/product-detail/en/aven-tools/26200B-222/243-1391-ND/8323729but much higher price of course.When i first saw that led ring i only found it on two aliexpress sellers, after some months i spot that under aven tools, i saw the specs, pictures and its all the same, even the picture they show include same QC sticker inside the ring.I buy my from:https://www.aliexpress.com/item/FYSCOPE-On-Sale-Polarized-LED-Ring-Lights-for-Microscope/32858654328.htmlI left a message to seller for EU Charger and ship as ePacket, he reply saying that's not a problem and everything was sent as i requested so i recommend this guySee the video, comparing my old 144led ring with this new, the polarized led ring starts at 3:50:

author: thm_w
author_rank: Super Contributor
timestamp: September 17, 2018, 07:40:25 pm
content: If you just have the polarizer on the LEDs and not the microscope, does it work well enough?

author: sn4k3
author_rank: Frequent Contributor
timestamp: September 17, 2018, 07:45:59 pm
content: Quote from: thm_w on September 17, 2018, 07:40:25 pmWell i did not test that but i guess it will not do anything, since you need two polarizer to make the effect.However i test without the LED polarizer, you can see on video (3:50), i have attached the led len after installing the ring to scope.So my guess is one without the other will not work / produce the effect.But if you really want to know i can do the test

author: cpposteve
author_rank: Regular Contributor
timestamp: January 05, 2022, 11:05:14 pm
content: just bought one as they where having a 45% sale. fingers crossed it arrives as described

author: damanloox
author_rank: Contributor
timestamp: February 11, 2022, 06:26:04 pm
content: Which one did you get - 120 LED version of 16 LED...?Also - do you think this one is the same:https://www.aliexpress.com/item/1005002961616258.htmlIt's slightly cheaper and looks exactly the same (and has a few reviews)

author: sn4k3
author_rank: Frequent Contributor
timestamp: February 11, 2022, 09:12:07 pm
content: Quote from: damanloox on February 11, 2022, 06:26:04 pmThe 16 LED looks like COB with lens which may produce more light, but you better ask the seller for differences.If so, i would go for 16 leds, as the other 120leds are regular low light LEDs