Will this work on the om-d mk iv?

I don't know. Contact the seller or manufacturer. If you buy it from Amazon their policy is that you can return it if it does not work, for a refund. Mine is for a Nikon D750 and works perfectly. VERY good quality! I was impressed and I'm an old Pro!

are these compatible with the new fuji lens 70-300 mm (it has a slightly different attack, and my other set of ext. tubes are not working with it!)

Ive had issues with these tubes and my 23mm 1.4 . One of the tubes it refuses to work with and just starts that weird flicker. Also be aware the tolerances on these can be a bit tight, i actually ended up with shavings that luckily didn't damage my sensor but easily could have.

Can its autofocus be used for reversed lens for Nikon z50?? Is there a way to have autofocus for reversed lens macro photography???

If you use a simple reverse adapter with the JJC auto focus macro extension tubes the lens will lose all electronic connection to the camera (such as your Nikon Z50), so no auto focus, etc. However there is a $596 accessory that should retain all the electronic features of modern auto focus lenses, it's called the Novoflex Automatic Reverse Adapter for Nikon Z-Mount (available in other popular camera mounts as well).

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JJC Micro 4/3 Auto Focus Macro Extension Tube Set for Olympus OM-3 OM-1II OM-5 OM-D E-M1 III E-M5 E-M10 III E-M1X Pen E-PL10, Panasonic Lumix G9 II G7 G85 G95 GX85 GX9 GX8 GH7 GH6 GH5 GH5S GH4 & More

Product ID: 51045938

Details

Brand
JJC
Camera Lens Description
10
Compatible Mountings
Micro Four
Focal Length Description
10 millimeters
Lens Type
Macro

📏10mm & 16mm extension tubes for versatile magnification

🔩Aluminum & brass mounts for durability

⚙️Full autofocus & auto exposure compatible

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R1462

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔍 Elevate your macro game—capture the unseen with precision and style!

PRO TIP FOR SHARPEST SHOTS - For ultra-crisp macro images, pair with manual focus or a tripod and focusing rail—because every detail counts.
FLEXIBLE MAGNIFICATION OPTIONS - Use 10mm and 16mm tubes individually or stacked to dial in the perfect macro shot every time.
PRECISION BUILD WITH PREMIUM MATERIALS - Aluminum camera mount and brass lens mount ensure rock-solid durability and seamless fit for your Micro Four Thirds gear.
TRANSFORM ANY LENS INTO A MACRO POWERHOUSE - Slash your minimum focusing distance and capture stunning close-ups without splurging on a dedicated macro lens.
SEAMLESS COMPATIBILITY WITH OLYMPUS PANASONIC - Designed specifically for Micro Four Thirds cameras and lenses, guaranteeing smooth autofocus and exposure control.

The JJC Micro 4/3 Auto Focus Macro Extension Tube Set is a premium accessory designed for Olympus and Panasonic Micro Four Thirds cameras. Featuring durable aluminum and brass mounts combined with high-quality ABS tubes, it shortens your lens's minimum focusing distance to unlock macro photography potential without the cost of a dedicated macro lens. With 10mm and 16mm tubes that can be used separately or stacked, it offers flexible magnification while maintaining full autofocus and auto exposure compatibility. Ideal for professionals seeking sharp, detailed close-ups with their existing lenses.

Specifications

ASIN	B071RKFP6X
Best Sellers Rank	#1 in Lens Extension Tubes
Brand	JJC
Camera Lens	10
Compatible Camera Models	Olympus M4/3 series, Panasonic M4/3 series
Compatible Camera Mount	Micro Four Thirds
Customer Reviews	4.3 4.3 out of 5 stars (70)
Exposure Control Type	Automatic, Manual
Focal Length Description	10 millimeters, 16 millimeters
Focus Type	Auto Focus, Manual Focus
Global Trade Identification Number	06970696042445
Image stabilization	Optical
Item Weight	4.64 ounces
Lens	Macro
Lens Coating Description	Multi layer
Lens Design	Prime
Lens Fixed Focal Length	16 Millimeters
Lens Mount	Micro Four Thirds
Manufacturer	JJC
Manufacturer Part Number	Topfoto AET-M4/3S
Maximum Focal Length	16 Millimeters
Minimum Focal Length	10 Millimeters
Model Name	Topfoto AET-M4/3S
Model Number	Topfoto AET-M4/3S
Number of Diaphragm Blades	7
Warranty Description	1 year
Water Resistance Level	Not Water Resistant
Zoom Ratio	8:5

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