Recommendations for extension tubes...

Something to be aware of is you get greater magnification for any specific length of extension tubes with wide angle lenses and less with telephoto lenses.
With several extension tubes on a wide angle sometimes focus is inside the front element!
Search Amazon extension tubes - Olympus and several are shown
I use Meike for my Nikon Z - they are OK at around £40 for 2.
You can get "auto focus" tubes with electronic contacts in the £35-40 range..
Auto focus generally only works if you pre-focus within about half an inch of your subject
Depth of field is usually a few millimetres - or less.
With several extension tubes on a wide angle sometimes focus is inside the front element!
Search Amazon extension tubes - Olympus and several are shown
I use Meike for my Nikon Z - they are OK at around £40 for 2.
You can get "auto focus" tubes with electronic contacts in the £35-40 range..
Auto focus generally only works if you pre-focus within about half an inch of your subject

Depth of field is usually a few millimetres - or less.

I use extension tubes and close up filters,but extension tubes provide minimal magnification when used with telephoto lenses — which is unfortunately their main weakness
Close up filters give more magnification than extension tubes when used with telephoto lenses
Have a look here,a mine of info on tubes/close up`s
https://www.cambridgeincolour.com/tutorials/macro-extension-tubes-closeup.htm
Close up filters give more magnification than extension tubes when used with telephoto lenses
Have a look here,a mine of info on tubes/close up`s
https://www.cambridgeincolour.com/tutorials/macro-extension-tubes-closeup.htm