Preston Light Ranger 2 W lightranger2w lr2w preston By Brian Aichlmayr on 3/16/20, 1:22 PM • 326 views Curious about peoples thoughts on the new LR2W. I did a few tests recently with the Alexa Mini LF in OG mode to see hoe the new W fairs differently vs the LR2. Right away I noticed the differences. LR2 works well from 35mm lenses on up to tighter lenses. LR2W works well from 21mm to 50mm, maybe a bit wider but we didn't have a wider lens to work with at the time. You'll loose a few bars on the 21mm as the frame is wider than the sensor bars but in contrast, the LR2 would not of been able to reach to distance across and you'd end up with a tiny 16 bars to judge focus.
Aidan Gray On 3/19/20, 4:31 PM Just prematurely wrapped a pilot with Ian Axilrod, who is also on here, and our rule of thumb was basically LR2-W for everything 40mm and wider (Alexa Mini LF OG) and LR2 for everything tighter than 40mm. Its a bit annoying to swap sensors but was way less of a deal than I thought it would be. We kept them in a little blue pelican on the top of the camera cart and it was pretty simple to just walk over, put the old one back and pick the new one up. Another thing we did for this pilot (which I know you've seen) is we MSLA 3D-printed mattes for the RX region of the LiDAR arrays to help minimize incorrect readings due to atmosphere. We never really got around to getting to test them in a truly hazy room, but they certainly didn't hurt. Alana at PCS mentioned the LR2-W and LR2-M being laser-based vs the LED-based M16 board in the LR2 so any incorrect readings on the former are more likely to be fixed from software improvements than from any physical masking (really hard to mask a laser...). I'm not really educated in LiDAR and the limitations/advantages of the tech, but its just something to think about if/when you pick up an LR2-W and have issues with accuracy in atmosphere. And lastly, because I'm not sure a lot of people know about it, you can read up on the specs of the OEM LiDAR modules inside the LightRanger devices at this link. They;re manufactured by LeddarTech and I believe the LR2 is the M16D-75B0007, the LR2-W is the M16R-75J0001, and the new LR2-W is M16R-75J0003. The biggest shock to me is that this site states the read-out accuracy is rated to 6.25hz which is... slow. Kar Wai Ng On 5/12/20, 9:01 PM Thanks for the inside scoop on the components they're using. I was wondering why the LR2W had the lenses arranged that way; turns out that's just how they are on the board. Amazing to see how off-the-shelf OEM components get transformed into the tools we use. I found out a while ago that the Wards Sniper uses off the shelf LaserTech TruSense modules; same form factor, built-in laser module and everything. Chris Steel On 3/18/20, 2:19 PM I've been looking at the LR2 for a while now. Trying to weigh up what would work for me. I got a good hands on with it at BSC this year and really liked both the W and the M. I feel the LR2M is a nice improvement. Better range, slightly wider FOV, much lighter and smaller. The W really feels like a special use case. As a choice between the two I'd want the one with more reach for long lenses where focus is super critical. Then Hire in the W for jobs which will mostly be on wides or anamorphic LF