will this work with the fujifilm 55-200?

Straight from Fujifilm Global your answer is as follows;Compatible lens XF50-140mmF2.8 R LM OIS WR70mm-196mm (107mm-299mm in 35mm format equivalent) F4XF100-400mmF4.5-5.6 R LM OIS WR140mm-560mm (213mm-853mm in 35mm format equivalent) F6.3-8.So armed with this information the answer would be no.

My x-t20 is using the most current firmware. i plan to use this teleconverter on a 100-400mm lens. do i need to update the lens somehow?

The Fuji 1.4TC is an excellent piece of gear. It should work fine with the Fuji 100-400.

My x-t20 is using the most current firmware. i plan to use this teleconverter on a 100-400mm lens. do i need to update the lens somehow?

Yes you may have to update your firmware for camera and lens. Check your owners manual, it is to complicated to answer here

Will this work with 70-300mm Fujifilm

I understand the new 70-300 Fuji zoom lens will accept both 1.5 and 2.0 teleconverters! Although I personally do not own the 70-300 lens!

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Fujinon Teleconverter XF1.4x Weather Resistant Lens

Product ID: 52998601

Details

Brand
Fujifilm
Compatible mountings
Fujifilm X
Focal length description
274.4
Focus type
Auto Focus
Lens design
Teleconverter
Lens type
Teleconverter

🔍1.4x focal length boost

⚙️7 elements in 3 groups optical design

🛡️Weather & dust resistant

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VT223642

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Description

📸 Elevate your lens game — capture moments others only dream of!

EXTEND YOUR REACH - Multiply your lens focal length by 1.4x for stunning close-ups without changing lenses.
OPTICAL EXCELLENCE - 7-element, 3-group construction preserves sharpness and image quality even with teleconversion.
LIGHTWEIGHT COMPACT - Adds minimal bulk and weight (130g), so your gear stays agile for all-day shooting adventures.
BUILT FOR THE ELEMENTS - Weather and dust-resistant design lets you shoot confidently in rain, dust, or cold down to -10°C.
SEAMLESS COMPATIBILITY - Perfectly integrates with Fujifilm X-mount lenses, maintaining autofocus speed and camera info updates.

The Fujifilm Fujinon Teleconverter XF1.4x WR is a precision-engineered teleconverter that extends your compatible Fujifilm X-mount lenses' focal length by 1.4x while maintaining exceptional optical performance. Featuring a robust 7-element, 3-group design, it ensures sharp, high-quality images. Its weather and dust-resistant build supports shooting in challenging environments down to -10°C, making it an essential tool for professional and enthusiast photographers seeking versatility without compromise.

Specifications

ASIN	B016S28HBW
Best Sellers Rank	36,141 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 395 in Camera Lenses
Box Contents	Fujifilm Fujinon Teleconverter XF1.4x Weather Resistant Lens
Brand Name	Fujifilm
Camera Lens	A 1.4x teleconverter for Fujifilm X mount cameras, designed to be weather-resistant and compatible with specific Fujifilm lenses, with features such as maintaining AF speed and updating camera information for focal length and aperture.
Colour	Black
Compatible Camera Models	Fujifilm X-Series cameras
Compatible Mountings	Fujifilm X
Customer Reviews	4.5 4.5 out of 5 stars (214)
Exposure Control Type	Automatic, Manual
File Format	RAF
Fixed Focal Length	196 Millimetres
Focus Type	Auto Focus
Global Trade Identification Number	00074101027211, 04547410310429
Image Stabilization Type	Optical
Iso Range	200-12800
Item Weight	130 g
Lens Coating Description	Fluorine Coating
Lens Design	Teleconverter
Lens Mount	Fujifilm X
Lens Type	Teleconverter
Light Sensitivity	200-12800
Manufacturer	Fujifilm
Manufacturer Part Number	Fujinon XF1.4X TC WR
Maximum Aperture	2.8 f
Maximum Focal Length	1.4
Media Type	ProductImage
Minimum Focal Length	1.4
Model Name	FUJINON XF 1.4x Teleconverter Lens
Model Number	16481892
Real Angle Of View	1.4 Degrees
Shooting Modes	P, A, S, M
UPC	074101027211
Unit Count	1.0 count
Video Capture Format	MP4
Viewfinder Type	Electronic viewfinder
Water Resistance Level	Water Resistant
Zoom Ratio	1.4

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VT223642

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

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