Boris Kalaidjiev Posted June 13, 2022 Share Posted June 13, 2022 Hi everyone, I was wondering why did Arri transition from PL - 52mm to LPL - 44mm? I get that with the LPL mount has a wider diameter 62 mm vs 54 mm for PL and can cover bigger sensors. But why did they keep the flange distance at 44mm and not bring it closer to the camera since the LPL mount is only meant for digital cameras and there is no need to provide space for a mechanical shutter? Optically speaking isnt it harder to design lenses for longer flange distances compared to shorter ones? Sony E-mount has theirs at 18mm at can easily cover FF sensors. Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted June 13, 2022 Premium Member Share Posted June 13, 2022 44 minutes ago, Boris Kalaidjiev said: Optically speaking isnt it harder to design lenses for longer flange distances compared to shorter ones? Generally speaking, yes. You are not the first person to ask why LPL is not a shallower mount. It's a very reasonable question. It's not how a lot of people would have done it. Link to comment Share on other sites More sharing options...
Boris Kalaidjiev Posted June 13, 2022 Author Share Posted June 13, 2022 Could the LPL - 44m flange distance be because: 1) They need the space to clear for optical low pass filters or infrared filters etc? 2) Having a longer flange distance will make room to design a bigger and stronger lens mount to support heavy cinema lenses? Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted June 13, 2022 Premium Member Share Posted June 13, 2022 I don't think it's an issue of filters; the JVC GY-LS300 has a rotating ND filter wheel behind a micro four-thirds mount that's not even intended to accommodate Super-35 sensor, and while that's a very small, low cost camera, it demonstrates that it can be done. I would imagine whoever made the decision had a good reason, but nobody seems to know what that reason was. 1 Link to comment Share on other sites More sharing options...
Michael Lindsay Posted June 13, 2022 Share Posted June 13, 2022 (edited) I was interested in this and talked to Arri.. (I may have misremembered but this is what I took away) Yes the space is for the obvious stuff like OLPF + IR and UV filers etc but also for the Variable ND systems of now (Arri's current tech) but also for the unknown innovations in the future and if you don't leave enough room now then there will never be enough room.. Maybe a new creative filter system, or a Vari con or a more extensive ND system from Arri with more granualirty and range? Ultimatly it was perhaps Arri being conservative but that seems to be key to their brand... Also with a increased width it is more possible to have optical elements driven far closer to the sensor than 44mm .. Look how far rear element extends beyond the LPL flange here https://www.instagram.com/p/CcHE_j9vuqX/?hl=en Edited June 13, 2022 by Michael Lindsay 1 Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted June 13, 2022 Premium Member Share Posted June 13, 2022 Again, bear in mind that cameras from JVC and Sony have all the filters, including mechanical ND wheels, behind much shallower mounts. It's not that. Link to comment Share on other sites More sharing options...
Robert Hart Posted June 18, 2022 Share Posted June 18, 2022 44mm is also the Flange to focal distance for Canon EF-Mount Lenses. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now