The Tiffen 4.5" Round 81EF Light Balancing Filter helps to decrease the color temperature by 650K in order to warm the image slightly in order to match the color quality of illumination. When using an 81EF filter, you will be able to attain 3200K balance when the prevailing light source is 3850K. 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 and grinding flat to a tolerance of 1/10,000th of an inch.

Warming Light Balancing Filter    Less 650K to Convert 3850 to 3200K    ColorCore Technology

Light balancing filter decreases color temperature and provides a warming effect.

Subtracts 650K in order to attain 3200K color balance from 3850K illumination.

Filter factor of 1.5 requires a 0.6-stop increase in exposure.

Related Questions and Answers

Q: 1. Why aperture F/3.5 works only for zoom 35 and 40, not for 50 to 75?

A: The maximum aperture on Hasselblad XCD 35-75mm f/3.5-4.5 Lens is variable. It is maximum 3.5 at the wider angle setting. As you zoom in the lens the maximum aperture changes to 4.5. That is a normal operation of the lens.

Q: 2. Does this lens require slim-mount 46mm filters? Or will a regular 46mm work? Thanks!

A: The ZEISS C Biogon T* 21mm f/4.5 ZM Lens (Silver) compatible with regular 46mm thread filters.

Q: 3. This lens is specified as internal focusing, but is it internal zooming as well?

A: The Hasselblad XCD 35-75mm f/3.5-4.5 Lens has internal zooming and focusing. The length of the lens remains the same across the zoom range.

Q: 4. Will this fit a FUJIFILM XF 70-300mm f/4-5.6 R LM OIS WR with camera body attached?

A: The Manfrotto Advanced III 3L Camera Holster (Medium) can accommodate the FUJIFILM XF 70-300mm f/4-5.6 R LM OIS WR lens with a camera body attached, depending on the specific camera.

Q: 5. Is the lens weather sealed?

A: Yes, the Hasselblad XCD 35-75mm f/3.5-4.5 Lens BH #HA3575XCD is a weather sealed lens.

Q: 6. Will this case fit a Nikon z6 II with the 70-200 Z lens attached with the lens hood in the stored position?

A: Manfrotto Advanced III 3L Camera Holster (Medium) BH #MAMBMA3HM has Interior Dimensions 8.9 x 6.3 x 3.9" / 22.5 x 16 x 10 cm so it will not fit the Nikon Z6 II with the Nikon NIKKOR Z 70-200mm f/2.8 VR S Lens BH #NIZ7020028 which is 8.66" long.

Q: 7. Is this lens made in China?

A: Country of origin at this time is Sweden.

Q: 8. Which size holster bag will fit nikon p1000

A: The Lowepro Photo Active TLZ 50 AW Top-Loader Camera Bag (Black), BH # LOLP37346 would be a better option for the Nikon P1000: https://bhpho.to/33QuJdH

Q: 9. can this be used as carry on in a plane?

A: Most domestic airlines have a carry-on size limit of 22 x 14 x 9", as this is 22 x 14 x 7.3" one should be able to take this as carry-on on most airlines. It is always best to check with the airline before one flies to be sure it fits the requirements for that flight.

Q: 10. Will this holster fit my Nikon Z6II with S 24-70mm f2.8 lens attached?

A: Yes.