Want to Buy WTB: 39mm light yellow filter

[Ulophot]

For casual shooting. Leica unnecessary; a Tiffen or Hoya in good shape would be fine.

 

[Rod Klukas]

For casual shooting. Leica unnecessary; a Tiffen or Hoya in good shape would be fine.

However, I would note that the Heliopan or B+W could be sharper due to the way the glass is made.

 

[Maxwell]

Rod - how's that?
TIA
David

 

[Rod Klukas]

Rod - how's that?
TIA
David

First you must remember that glass is a superfluid. So it flows. See the windows in a very old house with glass thicker at the bottom than at the top.

Some manufacturers use plate glass which may not be perfectly flat, and cut out the glass flats like cookies with a cookie cutter.

Heliopan takes a column of glass and slices each flat like cutting a sausage. Therefore these can be certain to have both sides of the flat absolutely parallel.
They are then polished and coated. Another benefit of Heliopan is the brass rings the filters are mounted in. Being harder than aluminum rings they are much sturdier and do not end up with chewed threads, etc.
Hope this helps.
Rod

 

[rpavich]

I have a B&W Orange filter in 39mm if you don't find a yellow one and want to try orange. It's in perfect shape, case and all. I bought it for my M6 but don't own the M6 anymore.

 

[Maxwell]

Rod - Many thanks for the explanation. So not all filters are made the same way as Heliopan filters?
TIA
David

 

[chip j]

B+Ws are as good as Heliopans.

 

[AgX]

Some manufacturers use plate glass which may not be perfectly flat, and cut out the glass flats like cookies with a cookie cutter.

Heliopan takes a column of glass and slices each flat like cutting a sausage.

Both is done.
Heliopan does not slice blocks, but instead buys glass panes, cut disks and polish these.
However panes already polished are available from the glassworks too.

 

[guangong]

Tiffan filters are very popular with cinematographers. If memory serves me right, Tiffany filters are sandwiches of colored gelatin between to pieces of optical glass. They may not be as durable as solid glass filters, but mine have served well for decades. Any filters marketed by High end camera makers Nikon, Canon should be ok, as well as Walz, Hoya and German filters mention above. I would avoid cheap filters. Almost forgot, Kodak made very good filters. And a French made filter with non French name ( I have several but just can’t recall name right now.
The good news is that filters are a lot cheaper now than several decades ago.

 

[GRHazelton]

filterfind.net is a good source for used filters. Tim knows his stuff. For example I have lovely Zeiss Ikon Contessa folder with threads on the OUTSIDE of the lens. Tim found a suitable series adapter and a nice case to hold it and a few filters for BW shooting.

 

[Eric Rose]

Both is done.
Heliopan does not slice blocks, but instead buys glass panes, cut disks and polish these.
However panes already polished are available from the glassworks too.

You say that as a strong statement of fact. It contradicts the companies rep so I ask you what is your proof?

 

[AgX]

-) Heliopan's own statement by way of their advertising video on their production. I once started a thread on that video.
-) Schottt's sales offer on polished filter glass.

 

[AgX]

First you must remember that glass is a superfluid. So it flows. See the windows in a very old house with glass thicker at the bottom than at the top.

Glass is not a superfluid.
Glass is amorph.

Concerning the fluidity of glass, some hardbuff Apuggers may twist their lenses each night into another orientation to avoid setting, but this is not an industry standard at all.

(Actually I still have to be shown old windows that are thicker below than above. Due to pre-floatglass pane production techniques panes may be wavy or even have varying thickness and that may be seen as proof for that myth.)

 

[Eric Rose]

#AgX your correct however rather than just saying someone is wrong why not take the opportunity to make it a teachable moment. This article by Scientific American would have been a great add on to your assertions.

 

[RalphLambrecht]

However, I would note that the Heliopan or B+W could be sharper due to the way the glass is made.

doubt it.

 

[bunip]

Actually I still have to be shown old windows that are thicker below than above.

In Doge's Palace in Venice you can see some window's glasses (5-600 years old) that are "dripping" through their retaining iron frames..