Saba Mazloum Posted April 23, 2019 Share Posted April 23, 2019 Hey friends, Wanted to know if anyone tested out shooting 4:3 ratio on the Alexa LF? I'm guessing id need to use frame lines then crop in post yah? I would get shallower depth lets say using i7COOKE lens than using the Alexa mini 4:3 mode using lets say S4 lens right? Any insight would be greatly appreciated. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted April 23, 2019 Premium Member Share Posted April 23, 2019 Only about 1 1/3-stop difference in depth of field compared to a 4x3 regular Alexa... Cheaper to find some f/1.4 lenses. Link to comment Share on other sites More sharing options...
Saba Mazloum Posted April 23, 2019 Author Share Posted April 23, 2019 Hey David, What about resolution wise? Clarity etc? I mean i have these as choices i can use without issues with budget. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted April 23, 2019 Premium Member Share Posted April 23, 2019 It’s the same sensor just cut bigger, so I guess about 1.3X as many pixels. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted April 23, 2019 Premium Member Share Posted April 23, 2019 Works out to be a 1.4X difference in 4:3, assuming 4:3 on the LF is 4117 x 3096 versus 2880 x 2160 on a regular 4:3 Alexa. So assuming it's the difference between shooting at f/1.4 on a regular Alexa or f/2 on an Alexa LF, that's about a .4-stop difference in effective depth of field for a 1.4X increase in pixel count. Maybe better dynamic range in the shadows due to less noise on the LF, more due to the smaller degree of image enlargement. Best thing would be to shoot a comparison test with a ARRI Master Prime at f/1.4 on a regular Alexa versus a Cooke 7i at f/2 on an Alexa LF. Link to comment Share on other sites More sharing options...
Saba Mazloum Posted April 24, 2019 Author Share Posted April 24, 2019 Thanks a lot David, to me it was more about knowing I’d have higher in resolution of a image, and knowing that it would be a bit less noisy and better dynamic range is great too! Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted April 24, 2019 Premium Member Share Posted April 24, 2019 But is it enough of a difference to be worth the cost plus the inconvenience of a bigger, heavier camera? Link to comment Share on other sites More sharing options...
Saba Mazloum Posted April 25, 2019 Author Share Posted April 25, 2019 That’s for sure a considering factor no doubt, actually tomorrow ill be testing out the LF , Red Ranger, Mini and maybe Sony Venice to see which one will suit best for my current project. Have you had experience with the Ranger ? Link to comment Share on other sites More sharing options...
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