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 for Olympus Panasonic Camera | for Olympus OM-3 OM-5 E-M1III E-M5 E-M10 III E-M1X Pen E-PL10, Panasonic Lumix G9 II G7 G85 G95 GX85 GX9 GH7 GH6 GH5 & More

JJC Micro 4/3 Auto Focus Macro Extension Tube for Olympus Panasonic Camera | for Olympus OM-3 OM-5 E-M1III E-M5 E-M10 III E-M1X Pen E-PL10, Panasonic Lumix G9 II G7 G85 G95 GX85 GX9 GH7 GH6 GH5 & 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

₨1355

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

FLEXIBLE MAGNIFICATION OPTIONS - Use 10mm and 16mm tubes individually or stacked for customizable macro reach tailored to your creative vision.
AUTOFOCUS AUTO EXPOSURE READY - Maintain effortless shooting with full AF and AE support, while manual focus mode unlocks ultimate control on a tripod.
PRECISION BUILD WITH PREMIUM MATERIALS - Aluminum camera mount and brass lens mount ensure rock-solid durability and smooth operation.
SEAMLESS COMPATIBILITY WITH M 4 3 SYSTEMS - Perfectly engineered for Olympus and Panasonic Micro Four Thirds cameras and lenses—no adapters needed.
TRANSFORM ANY LENS INTO A MACRO POWERHOUSE - Slash your minimum focusing distance and capture stunning close-ups without splurging on a dedicated macro lens.

The JJC Micro 4/3 Auto Focus Macro Extension Tube set includes 10mm and 16mm tubes crafted from durable aluminum, brass, and ABS plastic. Designed for Olympus and Panasonic Micro Four Thirds cameras, it shortens the minimum focusing distance to convert standard lenses into macro lenses. Fully compatible with autofocus and auto exposure, it offers flexible magnification options and robust build quality, making it a must-have for creative professionals seeking detailed close-up shots without investing in expensive macro 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 (76)
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
Number of Items	2
Screen Size	10 millimeters
Unit Count	2 Count
Warranty Description	1 year
Water Resistance Level	Not Water Resistant
Zoom Ratio	8:5

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