Metabones updates aperture control mechanism on Nikon F adapters

[rdelbar]

Almost two years after starting my reviews of Nikon F to Fuji X lens adapters, I just added an update on the Metabones Speed Booster Ultra and improved aperture control ring.

 

Enjoy!

[Mikofox]

Regarding your Magic Numbers Scale ( and thank you for that and the research!)

Can you tell me how this scale will look when using the Metabones N/F - X mount adapter that only has a scale to 7?

I have it mounted to a Tokina ATX 100-300 f4 lens on a X-T1. The lens has 10 stops from 4 to 32, with 1/2 stops? between 5.6+8, 8+11, 11+16, 16+22

If I figured it out correctly the scale would look like this:

Lens Stops: 4-5.6-(6.7)-8-(9.5)-11-(13)-16-(19)-22-32

F=4

2=5.6

2.5=8?

3=11?

3.5=16?

5=22?

7=32

 

Have I figured this correctly?

[rdelbar]

See te diagram: the red numbers along the X-axis on top are for an adapter with a scale going to '7'. Y-axis shows stops below full aperture.

 

So (rounding slightly) F=f/4.0; 1=f/5.6; 2.5=f/8; 3.5=f/11; 4.5=f/16; 6=f/22; 7=f/32

[dfallsfilm]

Looks like the Nikon-Fuij X Ultra SB doesn't provided built-in apertuer blades but allowing us to control the aperture from the lens itself?

[Dis]

Looks like the Nikon-Fuij X Ultra SB doesn't provided built-in apertuer blades but allowing us to control the aperture from the lens itself?

Yes. Built-in-adapter aperture blades won't work like an aperture in-the-lens. They will cause severe vignetting. The only way to have normal aperture control is to use lens aperture blades.