David Roberson Posted October 30, 2021 Share Posted October 30, 2021 just finished a project and shot everything indoors wide open at T1.3 — should i be concerned. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted October 30, 2021 Premium Member Share Posted October 30, 2021 Concerned in what way? Optical performance of the lens at T1.3 (Super Speeds get somewhat soft wide-open) or focus pulling? Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted October 30, 2021 Premium Member Share Posted October 30, 2021 If the camera is setup well, fully calibrated and pre-tested to be spot on, I don't think you'll have a problem. If the image was in focus on the viewfinder, you should be fine. 1 Link to comment Share on other sites More sharing options...
Premium Member Dom Jaeger Posted October 30, 2021 Premium Member Share Posted October 30, 2021 Pretty vague question.. The main issue with shooting wide open is that your camera need to be properly calibrated, as Tyler mentioned. Just as your depth of field is reduced out in front of the lens, the tolerances behind the lens are also reduced. And if you taped out, the lens focus marks needed to be checked. These are standard things a rental house and crew would check in prep. Most lenses exhibit aberrations at very fast f stops, so you‘ll find the images softer or more flared or lower contrast than if you shot at a deeper stop. Different lenses can exhibit different aberrations. Knowing what your lenses do wide open is part of the cinematographers job. Link to comment Share on other sites More sharing options...
Daniel D. Teoli Jr. Posted October 31, 2021 Share Posted October 31, 2021 OP...don't you do any testing? Some lenses are OK wide open, some are crap. Point is, to test ahead of time so you know the limitations of the lenses. Link to comment Share on other sites More sharing options...
David Roberson Posted November 1, 2021 Author Share Posted November 1, 2021 On 10/31/2021 at 1:11 AM, David Mullen ASC said: Concerned in what way? Optical performance of the lens at T1.3 (Super Speeds get somewhat soft wide-open) or focus pulling? yeah biggest would be focus pulling. Link to comment Share on other sites More sharing options...
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