rcarol

Actually, the items that I have purchased from them have been quite nice. Certainly not the best quality but not the worst either.

Mojaveflyer Loc: Denver, CO

I haven't seen any discussion of Thousand Oaks Optical. I have three of their solar filters and have had excellent results without losing my eyesight or burning the shutters on my cameras. Not the least expensive but they are trustworthy and provide a good product: https://thousandoaksoptical.com/

Mr Bill 2011 Loc: southern Indiana

I used a SolarLite filter sheet from Thousand Oaks for the 2017 eclipse. I used a Nikon P900 and made a simple slip on filter using the cardboard holder the filter came in and some construction paper; worked perfectly. I plan to use it again in 2024.

Jan2019 Loc: CA, San Fransicso Bay Area

My husband was an amateur astronomer and eclipse chaser. We participated in 9 eclipses, often viewing adjacent to NASA scientists. They all seemed to use mylar film and filters from Thousand Oaks.

dpullum Loc: Tampa Florida

Mr Bill and Jan are right, the plastic filter sheets are low cost and effective. DIY screw on can be made by epoxying the plastic on to a UV screw-on filter. An 8"x8" Thousand Oaks Optical Polymer sheet is $20 Amazon

https://thousandoaksoptical.com/shop/solar-filters/threaded-camera-filters/
58 mm solar polymer [plastic] is $52, not exorbitant price for a quality name.

Interesting: "We do not recommend cleaning the film substrate since it can be scratched or damaged,
however, loose dust can be blown off using up to 15 psi air pressure no closer than 6 inches from
surfaces." Canned air was not recommended when I was cramming [studying] on cleaning sensors.
Understandable since the plastic solar filter is tender... tho the film coating on my glass based filter is surly also tender... grinding with spit and a dusty cloth is not the way to have a good surface preserved~!
https://thousandoaksoptical.com/wp-content/uploads/SOLARLITE-threaded-instructions-2022.pdf

Linguistics: From my year of philosophy-logic in college there are words to avoid that carry unintended judgmental emotional attachments... example: "Cheap" implies poorly made... when "low-cost" is neutral suggesting a bargain. Another is "Chinese Rip-off" implying inferior. Well, many things in USA are like their competition but just different enough from original so as to avoid patent infringement... they are Rip-offs, but can be better than the original, possibly at a lower price.

Canisdirus

I doubt you will have any problems...and if you shoot mirrorless...only your sensor can be damaged (not great but better than your eyes).

Temu is a US Corp. btw...based out of Massachusetts.
Not an international purchase and protected/subject to the US laws and regulations.

rehess Loc: South Bend, Indiana, USA

NASA’s photos are good enough for me; I really can’t improve on photos taken from above the atmosphere. If I do notice this eclipse, I’ll probably do what I did the last time - watching others watching the eclipse.

DaveyDitzer Loc: Western PA

https://www.iso-certification.us/iso-9001-certification/documents-records/list-of-approved-vendors.html

Instead, ISO provides guidelines for organizations to establish their own supplier selection and evaluation

I thought the crux of ISO 9000 is a robust process that brings reproducible results. It's not that products are necessarily good or poor, only that each unit is like the next. You can make dog poo, but each one is like the next.

larryepage Loc: North Texas area

That is correct. And there are multiple standards covering various components of the process. Compliance says nothing about the quality of the product. It does imply that the organization is honest and accurate when it talks about that product.

riderxlx Loc: DFW area Texas

I am going to watch this thread. Curious as to how this solar filter works out so I am anxious to see your test results.
I already have solar filter sheet from Astro-Physics, it is called Baader astrosolar density 5. A4 size sheet.
I plan to make mine since I have screw on filters already.
I got this stuff because it read good about good color filtering.
Keep us posted please.
Bruce.

Real Nikon Lover Loc: Simi Valley, CA

Agree. I have intentionally bought some items from them knowing they are probably Chinese made junk or knockoffs. I was 100% right in my assessment. JUNK. They produced the products (as advertised) and once received discovered that the materials were substandard, skimpy, think, weak, synthetic junk. My fear for the filters is the material is indeed made with glass, proper filter ingredients but skimpy/cheap in those filtering elements (i.e. Nikon/Canon/Sony quality glass science). I would much rather pay more for a known source and not risk burning up a Z9 because I went cheap.

riderxlx Loc: DFW area Texas

Good point Real. My first thought when I read a post like this is and I have seen numerous ones here about cheap or low cost accessories. What gets me is that people spend a lot of money on a camera and then want to go 'cheap' on lenses and other stuff.
I have a D300 S and a Lumix FZ300. Not the big bucks stuff but no way I would take a chance on some cheap shit
that 'could' damage my sensor.
My gut feeling is that dpullums choice to try the Temu filter would be Ok. However I would like to see the test results with it.
Me, I would rather and do, spend a little more on something proven from a reliable source with a history.
Good reply Real.
Bruce.

Patsworld Loc: Idaho

And because you used Temu they now have hacked your phone and have access to all your private information because Temu is a communist China spy application.

Canisdirus

It's a US owned and operated business out of Massachusetts.

rehess Loc: South Bend, Indiana, USA

From Wikipedia: “Temu is owned and operated by the Chinese-based and Cayman Islands registered[8] company PDD Holdings, which also owns Pinduoduo, a popular online commerce platform in China.[9] The platform allows China-based vendors to sell and ship directly to customers without having to rely on intermediate distributors in the destination country”