NikonGear'23

Gear Talk => Lens Talk => Topic started by: Dr Klaus Schmitt on October 12, 2019, 10:32:40

Title: On Chinese ZWB1, ZWB2, ZWB3 lens filter problems
Post by: Dr Klaus Schmitt on October 12, 2019, 10:32:40

Bought a few of those cheap Chinese Filters for reflected UV photography, to see if the rumor about their not so good Quality Control (QC) is true..

(http://forum.mflenses.com/userpix/201910/455_82mm_ZWB2_P1770504_c_1.jpg) (http://forum.mflenses.com/userpix/201910/big_455_82mm_ZWB2_P1770504_c_1.jpg)

(http://forum.mflenses.com/userpix/201910/455_52mm_ZWB2_P1770493a_c_1.jpg) (http://forum.mflenses.com/userpix/201910/big_455_52mm_ZWB2_P1770493a_c_1.jpg)

Well, those two out of eight filters had prominent glass striae ("streaks" commonly called)!

Read more about it here: https://photographyoftheinvisibleworld.blogspot.com/2019/10/on-chinese-zwb1-zwb2-zwb3-filter.html (https://photographyoftheinvisibleworld.blogspot.com/2019/10/on-chinese-zwb1-zwb2-zwb3-filter.html)

Title: Re: On Chinese ZWB1, ZWB2, ZWB3 lens filter problems
Post by: Akira on October 12, 2019, 12:35:27

Wow, you could use them only for the light sources then...

Title: Re: On Chinese ZWB1, ZWB2, ZWB3 lens filter problems
Post by: Dr Klaus Schmitt on October 12, 2019, 22:09:36

Quote from: Akira on October 12, 2019, 12:35:27

Wow, you could use them only for the light sources then...

Even better, I get them replaced... ;-)

Title: Re: On Chinese ZWB1, ZWB2, ZWB3 lens filter problems
Post by: Akira on October 13, 2019, 01:31:09

Quote from: Dr Klaus Schmitt on October 12, 2019, 22:09:36

Even better, I get them replaced... ;-)

Hope you will get the proper replacements!  They seem to be equivalents of Hoya U-3X0 series.

Title: Re: On Chinese ZWB1, ZWB2, ZWB3 lens filter problems
Post by: arthurking83 on October 13, 2019, 07:13:22

Quote from: Dr Klaus Schmitt on October 12, 2019, 10:32:40

.....

Well, those two out of eight filters had prominent glass striae ("streaks" commonly called)!

....

Does this mean that the other 6 filters were properly OK?
Or did they just suffer to a lesser degree, not worthy of commenting upon?

If the former, then 1 in 4(25% failure rate) is probably too high a risk to take.