E-82 UVa II Filter on Vario-Elmarit 24-90 ?

[Peter Branch]

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A possible consideration is the re-sale value.

As I have learned filters not branded as Leica have very little, or no, re-sale value.

 

Whether or not a difference between 99.5% and 99.9% is important depends on which direction you are coming from.

To those of us brought up in the world of Quality Assurance / 6-Sigma etc, the figures that really matter are the differences between the value and 100%.

 

Hence 99.9% is 5 times better than 99.5% - emphatically not - virtually the same.

[hmathias]

Lensrentals published the 99.9% light transmission number. They also showed a $70 filter at 99.8% and a $20 filter at 99.5% so it’s not a big difference between the good filters despite big price differences.

 

They did another test for distortion but didn’t have a big enough Leica filter to include in that test.

 

Lensrentals has done a lot of filter articles.

 

https://www.lensrentals.com/blog/2017/06/the-comprehensive-ranking-of-the-major-uv-filters-on-the-market/

 

The big issue in filters isn't transmission, it's quality of the optical glass and whether or not it is ground flat (planar) with a Double-sided Lapper. A huge expensive machine with 2 counterrotating grindstones.  If it is not, than it behaves like a lens, (or a prism) attached to the front of your lens, and it alters the image.

 

Beyond that, multi-coating is important for good light transmission. B+W (now owned by Schneider Kreuznach, when I last looked), Hoya, Heliopan, and Leica filters all meet those optical criteria.  

[LD_50]

The big issue in filters isn't transmission, it's quality of the optical glass and whether or not it is ground flat (planar) with a Double-sided Lapper. A huge expensive machine with 2 counterrotating grindstones. If it is not, than it behaves like a lens, (or a prism) attached to the front of your lens, and it alters the image.

 

Beyond that, multi-coating is important for good light transmission. B+W (now owned by Schneider Kreuznach, when I last looked), Hoya, Heliopan, and Leica filters all meet those optical criteria.

Agreed. That’s why I mentioned they tested for more than light transmission and that they’ve done a number of filter articles.

[Irakly Shanidze]

I use a Kaisemann polarizer for product photography. Using UV filter "for protection" is necessary only when real protection is necessary. Like, when shooting angry camels, or in mountains, or at sea.

[Irakly Shanidze]

A possible consideration is the re-sale value.

As I have learned filters not branded as Leica have very little, or no, re-sale value.

 

Whether or not a difference between 99.5% and 99.9% is important depends on which direction you are coming from.

To those of us brought up in the world of Quality Assurance / 6-Sigma etc, the figures that really matter are the differences between the value and 100%.

 

Hence 99.9% is 5 times better than 99.5% - emphatically not - virtually the same.

 

B&W, Heliopan and Zeiss filters hold their price very well. Not UV, of course

[AlanD]

The big issue in filters isn't transmission, it's quality of the optical glass and whether or not it is ground flat (planar) with a Double-sided Lapper. A huge expensive machine with 2 counterrotating grindstones. If it is not, than it behaves like a lens, (or a prism) attached to the front of your lens, and it alters the image.

 

Beyond that, multi-coating is important for good light transmission. B+W (now owned by Schneider Kreuznach, when I last looked), Hoya, Heliopan, and Leica filters all meet those optical criteria.

I think what is impressive is that there is a measurable improvement in Leica branded UV filters.

[thighslapper]

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Format-Hitech have recently started lapping their new range of ND and GRAD filters for that particular reason.

 

Now they use a metal based coating sandwiched between 2 layers of glass that is spectrally neutral, that’s the only bit left to improve ..... for now anyway ......

Edited June 12, 2018 by thighslapper