The second hand copy i bought via Stockholm Pantbanken [Pawnbroker] at Farsta - was a LEMON. Neither AF (autofocus) nor VC (image stabilization) were working. Only manual focus and the usual expose and aperture settings (via camera) worked.

I told them to either lower the price considerably, or i send it back to get my money in return (which i have to right to, within 14 days according to the "distance purchase law" in Sweden).

A totally manual Macro lens - isn't worth 4200 SEK / 370 €.

Without functioning AF and IS I mean. It might be worth 70 - 100 € at best, definitely no more. I could have kept it - but not for that high price when considering the limited usefulness of that lens. It just seems silly, even if the lens might actually work for my specific scanning work (where i do not use AF nor VC image stabilization)

But not for that price !

Vignetting on Fujifilm GFX 50s II

I was able to test the Macro lens on the Fujifilm GFX 50s II camera briefly, and in manual mode. It seems OK.

At infinity it does shows soft dark corners (not much different from the fantastic sharp Sigma ART 70/2.8 Macro lens). But when going closer towards macro mode, vignetting is almost gone (just very, tiny little).

On my example it had a slight hint MORE of corner shading on in the right side / corners compared to the left. The vignetting also remained largely invisible, when stopped down to ƒ13 (in macro mode)

So, in that regard it seemed good. Sharpness was very good as well, all the way into the corners.

Good performance

Even wide open the lens had a admirably relatively good performance, as sharpness was very evenly distributed even towards the borders ! Yes, I do add a slight amount of sharpness in the original RAW's - in order to crispen up the finest details. Important is to have a short shutter exposure time / so that shaking isn't degrading optical performance.

Stopped it down to at least ƒ5.6, or even better to ƒ8 - and you get excellent sharpness.

In comparison with the Tamron SP 45mm ƒ1.8 lens - the latter vignettes less (almost nothing)

Vignetting

I was slightly less impressed with the Tamron SP 90/2.8 Macro, compared to the excellent Tamron SP 45/1.8 VC lens, which when stopped down literally doesn't show any at all when stopped down at infinity. But since it can be corrected almost entirely - it isn't a super problem exactly.

Tamron SP 90/2.8 Macro with GFX 50s II • wide open at ƒ2.8, focused at infinity [uncorrected]

Tamron SP 90/2.8 Macro with GFX 50s II • stopped down to 5.6, focused at infinity [uncorrected]

Tamron SP 90/2.8 Macro with GFX 50s II • stopped down to ƒ5.6, focused at infinity [CORRECTED]

Tamron SP 90/2.8 Macro with GFX 50s II • stopped down to ƒ 9 - barely any vignetting

Tamron SP 90/2.8 Macro with GFX 50s II • stopped down to ƒ 9 - no vignetting !

Notice

the last photos were made without tripod or with any kind of grace. It just wanted to see how the corners acted in the closer focus field; how much or little they would vignette. It wasn't made for a sharpness test.

After all, i already got a bit pissed off realizing that the AF / IS isn't working - therefore I wasn't really interested to test it any further than this.

One day later, I did test the Tamron Macro for scanning 6x7 negatives, because I wanted to see, how it performs in comparison to my (vignetting) Sigma 70/2.8 ART Macro lens mounted on a Fujifilm GFX mediumformat camera.