[Klaus]

https://olympus.com.au/product/dslr/em10mk4/index.html

https://olympus.com.au/product/dslr/mlen...index.html

---

※ This product is not compatible with the 5-axis sync IS that works with in-body 5-axis image stabilisation.

So they gave up one of their biggest selling points.

[wim]

Maybe it wasn't possible to have sync-is with this lens, or maybe it is reserved for the 150-400 Pro.

However, I do see messages that although it won't have sync-is. it will still work with IBIS for the 3rd axis, for roll.

Balanced review and comparison with the Panasonic Leica 100-400 here:
https://mirrorlesscomparison.com/micro-four-thirds-lenses/olympus-100-400mm-vs-panasonic-100-400mm/

Kind regards, Wim

[thxbb12]

The photos from the dpreview gallery of the Oly 100-400 are very bad. I find that none of them at 400mm are sharp.
The comparison at mirrorlesscomparison.com show the Oly 100-400 in a much better light.
Wonder if dpreview received a bad sample or if it is related to their technique?
The Oly is much bigger than the Pana while offering a smaller aperture range. If the reviewer at mirrorlesscomparison is correct, it seems to be optically better than the Pana however.

[Klaus]

I reckon the 100-400mm doesn't offer sync IS because it's a Sigma lens - possibly featuring Sigma's miserable OS (not compatible to sync-IS ...) - which would explain the mediocre efficiency rating.

---

For better samples - go here:

https://photos.google.com/share/AF1QipM1nZyQ2tRPrCSv6U9ylFio45nTMrLzoaCAQMWI1HBqsTObhriVSBbxQrF87_OVAA?key=M1A4bE52WGhQUnB6Q1VzZDJ5eHZEa1ZtM0E4UEN3

---

And while we are at ranting - why does this lens cost $1500 and the near-identical Sigma costs $800?
Sure there's the economy of scale - but it's also a way to push a system into oblivion.

[goran h]

Lenstip is not so impressed by this lens:
https://www.lenstip.com/144.4-article-Ol...mmary.html

[Klaus]

Well, it's made in JP - probably because it's made or at least pre-assembled by Sigma?

I'd say the lens is alright - it's just the price tag and the poor IS implementation that I don't understand.

Also - you can use an EF-MFT AF adapter to mount such FF lenses. If I had the choice between this one and a Canon EF 70-300L IS with adapter (costing the same), I'd probably settle for the Canon lens.

[wim]

Well, it's made in JP - probably because it's made or at least pre-assembled by Sigma?

I'd say the lens is alright - it's just the price tag and the poor IS implementation that I don't understand.

Also - you can use an EF-MFT AF adapter to mount such FF lenses. If I had the choice between this one and a Canon EF 70-300L IS with adapter (costing the same), I'd probably settle for the Canon lens.

That is the type of thing I do, just that similar FF lenses are quite a bit heavier and a lot less compact .

Kind regards, Wim

[Klaus]

Well, not in this specific case ;-)

[Rover]

If the Olympus 100-400 is really a Sigma design (as I've heard loads of times already) does that mean it's an FF lens in disguise?

[wim]

Lenstip is not so impressed by this lens:
https://www.lenstip.com/144.4-article-Ol...mmary.html

Hmm, other than that they do not state clearly what the sunnary is, all you can deduct is that they may not like the size of it.

However, a 100-400 is a big lens, on any system, there is no escaping from it. Could they have made it smaller? Possibly, but from the initial test reviews i have seen so far, it actually is slightly better than the PL 100-400 is, and that may have affected the size.

Kind regards, Wim