Should I upgrade from the olympus om d e m10 mark iv?

I'd keep the body and spend on glass first. The Mark IV is a great camera, and the Mark II and Mark III are older models, so neither is an upgrade. If something is holding your photos back, a lens usually helps more:

• Olympus M.Zuiko 25mm f/1.2 PRO for low light and portraits
• Olympus M.Zuiko 12-100mm f/4 IS PRO if you want one lens for almost everything
• OM System M.Zuiko 50-200mm f/2.8 IS PRO for wildlife and sport

If you're thinking of a bigger sensor, that's a system change, so check sensor sizes first. And if you want to spend less, buying used is the best deal going.

Written by Claude from this site's pages.