IBIS not working with new Samyang AF 12mm?

OrigamiCactus wrote:

Rightsaidfred wrote:

Noracsa wrote:

good to know that IBIS does work with third party lenses, or at least with viltrox.

Nope, cannot confirm that. Also this is not what OrigamiCactus said. I quickly tried with the Viltrox 23 mm f/1.4 and it works. Question is to what extent.

Martin

This is exactly what i said lol.

Yep.

there is no reason for ibis to not work with 3rd party lenses, so voightlander, tamron, viltrox, zeiss, tokina they all work fine. Because the ibis only needs to know the focal length to function perfectly. Viltrox 13mm, 23,56,85,35 all work with ibis as they should.

But it seems that the Samyang misreports the focal length or something, i can also make ibis not work, while it is turned on, by writing 0mm as the focal length.

fl reporting can be easily checked, just see the Exif data. I assume it's correctly reported. Otherwise reviewers and thousands of users would have complained and Samyang would have fixed it.

But reviewers don’t mention this, so maybe he got a faulty lens.

Maybe. Still, I'd like to ask other users to check whether IBIS really does not work at all with the Samyang lens. I do not see a reason why not. If not then it must be a software bug of a faulty copy or camera. As I already wrote, a question is whether IBIS uses the full potential of the Samyang lens, or if the camera takes a conservative assumption on the image circle of the lens.

Martin