The Tiffen 55mm 85 Color Conversion Filter helps to decrease the color temperature from 5500 to 3400K, allowing the use of tungsten-balanced film in daylight conditions. The warming effect of this filter requires a 0.6-stop increase in exposure for normal results.

This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.

Warming Color Conversion Filter    5500 to 3400K Color Temp Decrease    ColorCore Technology

Color conversion filter decreases color temperature and provides a warming effect.

Converts 5500 to 3400K for using tungsten-balanced film in daylight conditions.

Filter factor of 1.6 requires a 0.6-stop increase in exposure.

Related Questions and Answers

Q: 1. Am thinking of buying a Sony a7CR or a7C ii. Because this is an older lens, is it up to resolving the newest Sony sensors?

A: The Sony Sonnar T* FE 55mm f/1.8 ZA Lens is an amazing lens, and can definitely hold up with higher megapixel cameras such as the Sony A7R.

Q: 2. Is this a good lens to use for headshots?

A: My friend Matt Watkins is a pro, Hassalblad $40,000 Camera, his 50mm is $9,500. He is a devils advocate and won't let you win an argument for any reason. But when he used my A7 with the 55 1.5, he said, I cannot believe this, how much? Under a grand, almost fell down. Have been taking pics since 14 in 1982. never owned any lens that can do this. Just don't take pics of your wife unless she is comfortable with every imperfection in her face, this lens shows you everything. You simply have to buy it, that's all.

Q: 3. can this be used with a Nikon film camera like the Nikon F2?

A: No it can not , only Sony E mount Cameras

Q: 4. Water resistant

A: As far as we are aware, this lens has no weather-sealing.

Q: 5. does this lens have image stabilization feature?

A: No this lens does not have image stabilization. So far, only the FE zoom lenses have that feature, not the primes. However, the Sonnar t* FE 55mm f1.8 ZA is one incredible lens even without stabilization -- very sharp, almost no chromatic aberration or distortion and beautiful color rendition and bokeh. It gives my Leica Summicron 40mm and Summilux 50mm lenses a run for their money and has quick and accurate autofocus to boot. (Of course they do not have stabilization either and cost several times as much.) You just need to be careful with your shutter speed -- try to keep it at or above 1/125 and there should be no blur issue from shutter speed\. Since it renders great images wide open, you should still get great images. Of course if you are trying to get more depth of field with higher f-stops, try and be as steady as you can when the speeds get slower either bracing your camera with your arms lower on your body and using the tilt screen to frame the image instead of using the eye-level viewfinder or steadying the camera using a tripod,

Q: 6. How much does this lens weigh?

A: Weight (Approx.) : 10 oz. (281g)

Q: 7. The listing says that it's MFT, just wanting to confirm that it will work with the Blackmagic Studio Camera 4K? I'm also curious about recommended focus/zoom/iris controls for a live broadcast setup?

A: The BMD Studio Camera 4K does have an MFT mount. These lenses will work with that camera. However they are manual cinema lenses. For Focus, Zoom and Iris Control you would need to look at a system like the Tilta Nucleus-M and add a 3rd motor to it. Nucleus-M - https://bhpho.to/2IE1SLL Additional Motor - https://bhpho.to/2Q8FhLa

Q: 8. Is the ring on the lease a focus ring or a zoom ring? And if its a focus ring, is there any way of setting it into a zoom ring on the Sony A7?

A: This is a prime lens. It is only 55mm nothing else. So the focus ring is only a focus ring. Since this lens has only one focal length it stays and always will stay at 55mm. It is an excellent prime lens. If you want sharp. This is the lens to get. If you want a multiple focal lengths (zoom) in a lens you need to find another lens.

Q: 9. How is this lens on the 90D? Are the images sharp and in focus if shot correctly?

A: The Canon EF-S 17-55mm f/2.8 IS USM Lens is a very good lens on the 90D. I feel it is one of the best for the Non-Canon L models. And even better than some L lenses. It is one of the sharpest. It is unlike the L models not weather sealed.

Q: 10. Are zoom servos and controllers available for these lenses?

A: Yes, there is the Chrosziel Compact Zoom Control V2 Kit (SKU: CHCDMMKZ2) https://www.bhphotovideo.com/c/product/1520043-REG/chrosziel_cdm_mk_z2_mk_zoom_ii_lens.html , which would be compatible with these lenses and controllable with a standard LANC controller, such as the VariZoom VZ-Rock (SKU: VAVZROCK) https://www.bhphotovideo.com/c/product/330007-REG/VariZoom_VZ_ROCK_VZRock_Variable_Rocker_for_LANC.html