The Tiffen 4.5" Self-Rotating Warm Linear Polarizer Filter is a mounted filter that includes rear and front threads that allow filter stacking when using third-party or custom filter holders. This filter's rear threads are intended to retain a 4.5" non-self rotating mounted filter that is already placed within a compatible filter holder. A supplemental effect is then provided in addition to that of the retained filter. The Tiffen 4.5" Self-Rotating Warm Linear Polarizer Filter's front threads can then accommodate an additional non-self rotating mounted filter, which can then be held in place with a 4.5" retaining ring. Alternatively, another Tiffen 4.5" self-rotating filter may be screwed on top of the Tiffen 4.5" Self-Rotating Warm Linear Polarizer Filter.

Once installed, this filter can create a warm cast over an entire image while helping to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.

The warming effect of the Tiffen 4.5" Self-Rotating Warm Linear Polarizer Filter can be obtained under daylight when this filter is used on a film camera system with daylight film installed, or on a digital camera system with its daylight white balance setting selected. This filter's overall coloration reflects a mired shift value of +45.

A linear polarizer differs from a circular polarizer in that it does not contain an additional quarter wave plane. The addition of a quarter wave plane is to circularly polarize linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, in-camera auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

This filter is recommended when not using in-camera exposure metering or autofocus, is non-coated, and has approximately 40% average light transmission. It is constructed from optical glass for clarity as well as color fidelity and features an aluminum-alloy filter ring that can be rotated in order to adjust the intensity of the polarization effect.

Mounted Linear Polarizer Filter    Allows Stacking with Filter Holders    Adds Warmth to Image    3x Filter Factor, +1.6 Stops    +45 Mired Shift Value    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Optical Glass Construction    ColorCore Technology

Mounted with front or rear threads that allow filter stacking when using third-party or custom filter holders for film and television cameras

Rear threads retain a 4.5" non-self rotating mounted filter that is already placed within a filter holder

Front threads can accommodate an additional non-self rotating mounted filter witch can then be held in place with a 4.5" retaining ring

Front threads allow stacking with another Tiffen 4.5" self-rotating filter

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface

Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light

Can add a warm cast over an entire image when used on a film camera system with daylight film installed, or on a digital camera system with its daylight white balance setting selected

Clears up haze in distant landscapes and provides more saturated, vivid colors

Polarizing effect is strongest when used at a 90° angle from the sun

Recommended when not using in-camera exposure metering or autofocus

Non-coated

Approximately 40% average light transmission

3x filter factor reduces exposure by 1.6 stops

Constructed from optical glass for clarity and color fidelity

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

Aluminum-alloy filter ring for durability while remaining lightweight

Filter ring can be rotated to adjust the intensity of the polarization effect

Padded pouch for storage and transport

Related Questions and Answers

Q: 1. Is the Oben ACM-2400 4-Section Aluminum Monopod sturdy enough for a pair of them to be used as walking sticks as well? My wife had a knee replacement but wants to get out and hike and take photos. She has a pair of collapsible walking sticks (somewhere buried in our garage), but monopods would certainly expedite our photography if they are strong enough to serve double-duty. Thank you for sharing your experience with this monopod!

A: I would say yes as long as she needs a little help and if it's for a short distance. I can place my bracket, canon 5d m3 & 70-200 lens on top of this baby but if I push down hard enough it will lower (a lot of force). It is very sturdy. I'd recommend going on a short adventure, use them and let her test the weight of the monopod and comfort of use as a walking stick. Good Luck!

Q: 2. Is it possible to remove the legs from the bottom cap, or purchase a bottom cap without the legs?

A: The legs are stored inside the monopod and that acts as the cap for the bottom when you are not using the legs. It is best described on page 7 of the user manual: https://bhpho.to/2waKRWW

Q: 3. In the userguide of this product, I saw that it mentions about mouting HeadBall with this product. So does it come together with HeadBall or we must to buy separate one

A: This monopod does not come with a ball head, and you will need to purchase one separately. I recommend the Oben VH-R2 Tilt Head for Monopods: http://bhpho.to/Iwakv7

Q: 4. How much does the ACM-2400L 4-Section ...self standing Monopod weigh?

A: That monopod weighs 2.5 lb (1.13 kg)

Q: 5. Is anyone using this with a newer Sony Handycam Camcorder or similar? I am going to be using this with my brand new HDR-PJ670. I can see this as being a great replacement for a bulky tri-pod.

A: You still need to brace yourself with this even with the legs out and it would be necessary to purchase a ball head or pistol grip head to adjust for uneven surfaces to get a level. The legs on the tripod don't allow for you to adjust for horz/vert uneven ness in the ground the monopod is standing on.I can ajdust by grabbing railing, chairs or other surfaces to compensate but a pistol grip like Sliks would work much better.

Q: 6. Hi,I'm thinking of buying the OBEN ACM-2400L along with 'Manfrotto 498RC2 Midi Ball Head with 200PL-14 QR Plate'. Are they compatible to one another? Manfrotto monopod with self-standing legs is a bit too long for my liking (31' with ball head)

A: Yes. The 498RC2 Ball Head will work on the Oben ACM-2400L. Since the monopod has both a 1/4-20 and 3/8 compatible male thread, any standard head will work.

Q: 7. Will this work with the combination of the Fuji GFX 50sii and the Fuji GF 45-100?

A: Yes, FUJIFILM GFX 50S II Medium Format Mirrorless Camera with the FUJIFILM GF 45-100mm f/4 R LM OIS WR Lens fits on the Benro QRB95 Quick Rotating Bracket with enough clearance to manage your aperture ring and the lens Af /MF switch.

Q: 8. Somehow my mounting screw is gone from my monopod. Is there any way to purchase that part?

A: Please find the Oben Reversible 1/4 -20 and 3/8 -16 mounting stud at the following link: a href= http://bhpho.to/1DeGLoz target= _blank http://bhpho.to/1DeGLoz/a

Q: 9. Three set screws underneath the collar enable you to fasten the head securely to the plate.What exactly does this refer to? How does this relate to Oben heads for example which do not show an ability to be screwed to the plate other than with the main reversible mounting screw?

A: All of the ball heads will screw onto the tripod center column plate and are snugged down by hand. On some tripods, under the center column plate are three set screws that when run in from underneath will contact the underside of the ball head. This helps keep the ball head from unscrewing when panning back and forth over time. Hope this helps, Kirk

Q: 10. Hello. I have the ACM2400 right now. Could I just purchase the 3 x feet assembly to make it ACM2400L? Or do I have to buy the ACM2400L to have the feet assembly?

A: You need to buy the acm2400L