kye Posted yesterday at 10:25 AM Author Share Posted yesterday at 10:25 AM 1 hour ago, BTM_Pix said: It certainly is, thanks for doing that. Much appreciated. I brought these images into Resolve and had a play, as well as some others I shot but haven't posted. It seems that the squeeze factor might be slightly more than 1.25x in some shots. I de-squeezed by just scaling around 0.75-0.8 vertically, and scaled the shots in post to match framing and got 1.388 on one and 1.276 on another. So even applying a large pinch of salt as it wasn't locked off, the squeeze factor seems to be variable. I wonder if this is distance related as perhaps the adapter moves the lens plane forward so that optically the position the camera sees from is moved forward a touch, as this would explain why the squeeze factor seemed to be more than advertised. It seems it's also a skill to get it rotated exactly vertically (although the adapter itself is easy to use in this regard). Link to comment Share on other sites More sharing options...
kye Posted 4 hours ago Author Share Posted 4 hours ago Testing the Sirui 1.25x adapter at various F-stops, including all the way down to F0.95. I wanted to see how much the Sirui was compatible with faster apertures than F2.8, which is what the manual suggests you use. Setup was with the GH7 shooting 5.7K and the Voigtländer 17.5mm F0.95 lens, which isn't so sharp wide open. The below stills from a 5.7K timeline. I matched exposure on the middle of the image, and used a fixed WB (the Voigt has colour shifts). It seems like it does soften the image slightly, but it's pretty minor and I also can't be sure that I focused it 100% perfectly either (the Voigt goes a little past infinity and the GH7 only does 6x punch-in), so it's at least as sharp as these images. I'll have to test flaring in a separate test, and also other focal lengths, but if you don't have bright lights in frame then it seems like you can go faster than F2.8, at least at around 17mm, which really opens up more possibilities I think. I also randomly grabbed this shot last week with the 14-140mm and Sirui - no idea if I focused it properly but the vibe is pretty nice! Link to comment Share on other sites More sharing options...
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