The Tiffen 77mm 85 Color Conversion Filterhelps 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. Could you tell me this filter thickness? I Use on wide-angle lensthanks !

A: The glass is 2mm thick

Q: 2. How many stops should I add to get the correct exposure?

A: We cannot answer this question as it depends on a number of factors specific to your scene and photographic equipment.

Q: 3. WHAT NM RANGE DOES THIS FILTER DETECT?

A: Blocks all visible light and passes IR light 720 nm and above

Q: 4. How many stops is this filter?

A: The filter factor for this filter is 8x, which translates to 3 stops.

Q: 5. How does this filter effect skin tones would an orange 23a be better?

A: This filter is designed to effect contrast in B&W photography, it is not recommended for color photography as the entire image would be red.

Q: 6. Whats the filter size for the outside thread?

A: The Tiffen Variable ND Filters do not have front threads for attaching other lens accessories like a lens cap or screw on lens hood.

Q: 7. It is really worth to have this filter when using a lot of nd filtering? Like to use nd1.2 and nd9 combined when shooting for ex 4K with a A7S? Do you really noticemthat difference?

A: It depends on your camera... is your cameras sensor known to have IR issues?Are you doing long exposures where IR pollution can be a problem?If the answer is yes, then this filter will help to eliminate the IR pollution.

Q: 8. will this Tiffen 77mm fit on a GM 70 200mm lens? or should i get the Tiffen 82mm? it's for a present, so i do not understand how these measurements work. Thank you!

A: The diameter of the screw mount lens is often indicated (in mm) on the lens, along the outside edge of the front element, often with a greek letter Phi (circle with vertical line through it). If the lens isn't present, you might look up its specs on B&H website.

Q: 9. Does the 52mm fit on my 18-55mm Nikon D5600 lens?

A: You can use the lens to filter size tool on the Tiffen website to determine this information: https://tiffen.com/pages/filter-collection

Q: 10. Does this filter out UV as well as IR? Is there a light transmission graph for this filter anywhere? My goal is to find a filter that lets in UV (and visible is OK too), but not IR above 650 or 700nm. Thank you!

A: This filter only cuts IR light. For transmission data, please submit a request via https://tiffen.com/pages/contact