derekpanther Posted July 24, 2014 Share Posted July 24, 2014 Hi folks, I'm a total newbie when it comes to shooting video, so please bear with me. I've recently had a chance to play around with a GH4 and a few lens (Leica 25mm f1.4, Lumix GX 12-35mm, and a Nikon 50mm with adapter). I was wondering if there was a way to get clearer focus with the 25mm lens? Just when I think I have something in focus, I notice a lot of fuzziness around edges (see my example below): I shot this test at f1.8, ISO 400. In comparison, here are stills from all three lenses: Leica 25mm: '> 12-35mm: '> Nikon 50mm: '> Quote Link to comment Share on other sites More sharing options...
jonpais Posted July 24, 2014 Share Posted July 24, 2014 stop the lens down Quote Link to comment Share on other sites More sharing options...
leeys Posted July 24, 2014 Share Posted July 24, 2014 That is spherical aberration, have you not heard? It's what causes the "Leica glow". :P You'll need to stop the lens down. See if it goes away at f/2.8 Quote Link to comment Share on other sites More sharing options...
andy lee Posted July 24, 2014 Share Posted July 24, 2014 the Fujinon 25mm f1.4 c mount is very usable wide open at f1.4 and a fraction of the cost of the Leica Quote Link to comment Share on other sites More sharing options...
johnnymossville Posted July 24, 2014 Share Posted July 24, 2014 the Fujinon 25mm f1.4 c mount is very usable wide open at f1.4 and a fraction of the cost of the Leica This lens works with no vignetting? Quote Link to comment Share on other sites More sharing options...
andy lee Posted July 24, 2014 Share Posted July 24, 2014 yes its great , you have to modify the rear so it fits on a micro 4/3 adaptor , but its as sharp as my Carl Zeiss C/Y F1.7 50mm Planar I also use the Fujinon 35mm f1.7 which is a Zeiss Distagon Equivilant - its that good!! Quote Link to comment Share on other sites More sharing options...
derekpanther Posted July 25, 2014 Author Share Posted July 25, 2014 That is spherical aberration, have you not heard? It's what causes the "Leica glow". :P You'll need to stop the lens down. See if it goes away at f/2.8 Thanks for the tip, leeys! I went to f/2.8, and things became crystal clear :) Awesome, thanks again, and to everyone else who replied! Before (f/1.8): '> After (f/2.8): '> Quote Link to comment Share on other sites More sharing options...
Inazuma Posted July 25, 2014 Share Posted July 25, 2014 The edges were just out of focus, surely? Quote Link to comment Share on other sites More sharing options...
Mozim Posted July 25, 2014 Share Posted July 25, 2014 The edges were just out of focus, surely? I was going to say the same but it looks like nothing is in focus at all when shooting at f/1.8. In my experience, the Pana 25mm f/1.4 is decently sharp wide open. It does get a little better when stopping it down but I don't hesitate to use it at f/1.4 or f/1.8. What I noticed when shooting wide open in very contrasty conditions is that there can be quite a bit of purple fringing... but none of the fuzziness you described! Quote Link to comment Share on other sites More sharing options...
derekpanther Posted July 25, 2014 Author Share Posted July 25, 2014 I was going to say the same but it looks like nothing is in focus at all when shooting at f/1.8. In my experience, the Pana 25mm f/1.4 is decently sharp wide open. It does get a little better when stopping it down but I don't hesitate to use it at f/1.4 or f/1.8. What I noticed when shooting wide open in very contrasty conditions is that there can be quite a bit of purple fringing... but none of the fuzziness you described! I think you're right-- after playing around a bit more, I've been able to get some really crisp footage, even at f/1.4. I guess my hands were really unsteady in that first 1.8 test! f/1.4: '> and '> Julian 1 Quote Link to comment Share on other sites More sharing options...
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