Tiffen Decamired Glass Filters - For those who want a sure-fire way of getting accurate color temperature readings, the decamired system is the way to go. Using this formula, you can transpose temperatures from one point to another easily and quickly. This system is also useful when you wish to bring a certain amount of creativity to color photography.

Applications include keeping color temperature constant during the course of the day and producing the effect of different times of day. Available in two series, reddish filters that warm the light and bluish filters that cool the light. Each series contains 4 densities: 1.5, 3, 6, and 12. Filters in the same series can be combined.

Decamired filters are designed to more easily handle unusual color temperature variations than the previously mentioned filters. Available in increments of both a red and a blue series, Decamired filters can be readily combined to create almost any required correction. In measuring the color temperature of the light source, and comparing it to that for which the film was designed, we can predict the required filtration fairly well.

A filter that produces a color temperature change of 100K at 3400K will produce a change of 1000K at 10,000K. This is because the filter relates to a visual scale of color. It will always produce the same visible difference. A color change of 100K at the higher temperature would hardly be noticed.

Calculations
To use this concept, subtract the mired value of the light source from that of the film. If the answer is positive, you need a reddish filter; if negative, use a bluish filter. Mired-coordinated filters are termed as decamireds. Mired value divided by ten yields decamireds. The 60 mired shifts, above, would be produced by an R6 filter, where the higher values were that of the lighting.

Sets of such filters generally come in values of 1.5, 3, 6, and 12 decamireds in both B (bluish) and R (reddish) colors. These numbers are additive; that is, a pair of R3's produces an R6. An R6 plus a B6 cancel each other out to produce a neutral gray.

Used for Temperature Control    Available in Specific Increments    Warming and Cooling Variety

The decamired system has an advantage over the Kelvin system in that the Kelvin scale is not linear

Decamired readings provide more accurate/controllable readings than Kelvin

The difference between the Mired value of the film and the Mired value of the light is the Mired value of the correction filter that correctly tailors the light to the film

Related Questions and Answers

Q: 1. Is the lens hood included in box?

A: The ZEISS ZM lenses do not ship with lens shades and will need to be ordered separately. The lens shade is listed at: a href= https://www.bhphotovideo.com/c/product/551614-REG/Zeiss_1428_461_Lens_Hood_for_50mm.html?sts=pi target= _blank https://www.bhphotovideo.com/c/product/551614-REG/Zeiss_1428_461_Lens_Hood_for_50mm.html?sts=pi/a

Q: 2. Are the white numbers on the lens measuring in meters or feet?

A: The distance on the Voigtlander Nokton 50mm f/1.5 Aspherical II MC Lens (Black) is in meters.

Q: 3. Weather sealing for light rain or dust?

A: Unfortunately, the ZEISS C Sonnar T* 50mm f/1.5 ZM Lens (Silver) is not weather sealed for light rain or dust.

Q: 4. Does this records metadata of the image if I use it in Leica M10?

A: Exposure control with the ZEISS ZM lenses is the same as with any M mount lens. You have a choice of aperture priority or manual exposure modes. Shutter priority or program exposure modes are not available, since the camera cannot control the manual aperture of the lens. This is the case irregardless of the lens brand.

Q: 5. Who can repair these Leica-mount Voigtlander lenses, whether in or out of warranty? Leica repair people won't work on them.

A: This comes with Limited 1-Year Warranty by VoigtlanderDistributed By - Cosina Corporation

Q: 6. how does this handle in low light ? can you recommend any leica m mount to fuji x mount adapters ?

A: The lens is a manual lens. It does not support autofocus. It is f/1.5 so very good for wide open shots. And for a Leica M mount ot a Fujifilm X mount adapter this is a good one but is fully manual. FUJIFILM M Mount Adapter for X-Mount Cameras BH #FUMMA • MFR #16267038 https://bhpho.to/3uwnNuJ

Q: 7. will this work with Rotolight Elinchrom EL-Skyport Transmitter Plus HS for Sony? So that I can use a cage

A: Yes, the Vello Off-Camera TTL Flash Cord for Sony Cameras with Multi Interface Shoe (1.5') shoudl work with a Sony Multi-shoe and the Elinchrom EL-Skyport Transmitter Pro for Sony.

Q: 8. Can this lens be used on an original M-3 with good results?

A: Absolutely. Voigtlander lenses, like this Nokton 50mm f/1.5 Aspherical II lens, are a fantastic choice for Leica rangefinders.

Q: 9. How well does this work on Fuji x cameras?

A: The lens has a Leica M mount and will not work on the Fuji, unless you get a lens adapter from Leica to Fuji and then of course it will be fully manual. Having said that, it should perform nicely. Click the link below to view; https://bhpho.to/2YJJ7Rn

Q: 10. Does this records metadata of the image if I use it in Leica M10?

A: You will get metadata just not from the lens. It is fully manual.