Ari Posted July 13, 2017 Share Posted July 13, 2017 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 Quote Link to comment Share on other sites More sharing options...
tweak Posted July 13, 2017 Share Posted July 13, 2017 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. Ari 1 Quote Link to comment Share on other sites More sharing options...
Fritz Pierre Posted July 13, 2017 Share Posted July 13, 2017 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. Quote Link to comment Share on other sites More sharing options...
buggz Posted July 14, 2017 Share Posted July 14, 2017 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? Quote Link to comment Share on other sites More sharing options...
jonpais Posted July 14, 2017 Share Posted July 14, 2017 21 minutes ago, buggz said: How do you adjust the Speedbooster for infinity? http://www.metabones.com/article/of/infinity-adjustment-speed-booster-only Quote Link to comment Share on other sites More sharing options...
Fritz Pierre Posted July 14, 2017 Share Posted July 14, 2017 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 Quote Link to comment Share on other sites More sharing options...
jonpais Posted July 14, 2017 Share Posted July 14, 2017 and don't forget, don't try this on shag carpeting. Quote Link to comment Share on other sites More sharing options...
buggz Posted July 15, 2017 Share Posted July 15, 2017 Wow, thanks, how I missed this before, dunno... Quote Link to comment Share on other sites More sharing options...
Ari Posted July 29, 2017 Author Share Posted July 29, 2017 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. Quote Link to comment Share on other sites More sharing options...
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