GH5 + Speed Booster XL 0.64x + Tokina 11-16mm 2.8?

[Ari]

Hi,

Is this combination going to cause big problems in the image corners? If yes, can I get rid of them by using the extra tele conversion?

The reason I'm asking is that I'm getting a GH5, and I mostly have full frame EF lenses; this is the only non- full frame lens.

Thanks,

Ari

[tweak]

52 minutes ago, Ari said:

Hi,

Is this combination going to cause big problems in the image corners? If yes, can I get rid of them by using the extra tele conversion?

The reason I'm asking is that I'm getting a GH5, and I mostly have full frame EF lenses; this is the only non- full frame lens.

Thanks,

Ari

Just zoom in a little if it does... I don't see an issue here. It covers FF sensor at 14mm.

[Fritz Pierre]

I did a test with the 11-16 Tokina Nikon mount with the XL speedbooster...handheld with IBIS on,it got me down to 7.4mm without any vignette...my issue was that I discovered I have to adjust the speedbooster as I'm not achieving infinity, but the 11-16 was fine.

[buggz]

10 hours ago, Fritz Pierre said:

I did a test with the 11-16 Tokina Nikon mount with the XL speedbooster...handheld with IBIS on,it got me down to 7.4mm without any vignette...my issue was that I discovered I have to adjust the speedbooster as I'm not achieving infinity, but the 11-16 was fine.

How do you adjust the Speedbooster for infinity?

[jonpais]

21 minutes ago, buggz said:

How do you adjust the Speedbooster for infinity?

http://www.metabones.com/article/of/infinity-adjustment-speed-booster-only

[Fritz Pierre]

13 hours ago, buggz said:

How do you adjust the Speedbooster for infinity?

There are tutorials at Metabones' website, but essentially the is a metal housing with a setscrew...you loosen the setscrew and rotate the housing either clock or counterclockwise...it's an adjust,  tighten down test and repeat procedure...I'll lock my cam down on a heavy tripod with sandbags when I do it...just Google Speedbooster infinity adjustment 

[jonpais]

and don't forget, don't try this on shag carpeting.

[buggz]

Wow, thanks, how I missed this before, dunno...

[Ari]

I've done some testing now, and at 11mm the corners are dark/black, but this goes away before zooming to 12mm (as written on the lens), in normal 16:9 video mode. 

There's also problem with the infinity focus with this 11-16mm. I could adjust the speedbooster, but then what would happen with the Canon lenses that don't appear to have this problem? They can't focus close anymore? I currently don't want to try this because I can still return this item.

Another problem that I found is that with the EF 24-105mm f4L IS, and speedbooster, neither image stabilizer seems to work properly. I used the instructions on speedbooster site, and put the lens's switch in correct position before turning it on. However, if I try to use the lens's stabilizer, or the body stabilizer, I get really bad jitters from the IS. It feels like vibration in my hands, and the image shakes. There's no such problem with the 70-200mm f4L/IS. It feels like the 24-105mm does not connect really tight with the speedbooster, and if it moves a bit relative to the speedbooster, the IS shakes.