I'd like to hear what is suggested as your issues reflect mine. Although, I am having great success with the 6mm.bmurphy wrote: ↑Fri Jun 26, 2020 6:33 pmI'm looking for a lens that sits somewhere between these two. I'd like one with a wider FOV than the 16mm lens that I can take closer (but not too close) pictures without the distortion of the 6mm lens. Something that's a little bit more like a traditional camera without zoom.
All FOVs stated here are horizontal.
HermannSW wrote: ↑Sun Jun 28, 2020 10:17 pmAll FOVs stated here are horizontal.
FOV of Raspberry 16mm lens is 30°, of 6mm lens is 63°.
I got quite some M12, CS and C mount lens samples from Lee from Arducam for testing.
I like most (sofar) 35mm lens, but 10° FOV is not what you want.
Among the C, CS and M12 mount lenses I have, these are in 30°..63° range:
31° https://www.uctronics.com/arducam-31-de ... amera.html
80°-32° https://www.uctronics.com/arducam-c-mou ... amera.html
120°-38° https://www.uctronics.com/arducam-c-mou ... amera.html
50° https://www.uctronics.com/arducam-50-de ... amera.html
50° https://www.uctronics.com/arducam-m12-l ... apter.html
I did test M12 lens kit here:
And 4-12mm varifocal C-mount lens here:
8mm lenses post:
I have a cheap 12MP rated CS-mount lens with slightly more than 44° FOV as well.
jbeale calculated that it should be 8.3MP effectively for the HQ camera:
I can take photos with some of those lenses in case you want, and let me know how (distance, scene, ...).
I just did capture with 35mm lens and 50× zoom lens in series, in this posting you can see setup on 1st floor window sill:
HermannSW wrote: ↑Thu Jul 02, 2020 8:02 pmI just did capture with 35mm lens and 50× zoom lens in series, in this posting you can see setup on 1st floor window sill:
I removed zoom lens, and switched 35mm lens with 2.8-12mm varivocal lens.
It is getting dark (street lights are on, 10pm here right now).
So I took a photo with 2.8mm and maximal aperture for getting much light.
I used raspistill's "--focus" feature for focusing, more than 4000.
Here is 8.1MB 12MP image captured with "raspistill -o tst.jpg":
https://stamm-wilbrandt.de/en/forum/var ... erture.jpg
Same photo scaled to 15% for attachement here:
The video in this posting shows going from 12mm focal length to 2.8mm in small steps, so you can get an idea of distortion:
Form testing Arducam M12 lens kit for HQ camera, here you can see different amounts of barrel distortion for 50°, 70°, 90° and 130° M12 lenses:
The term you want is "rectilinear", as in "rectilinear fisheye". I have a 19mm (intended for 35mm still work) that is 180' FOV across the diagonal and is rectilinear.
W. H. Heydt wrote: ↑Thu Jul 16, 2020 2:59 amThe term you want is "rectilinear", as in "rectilinear fisheye". I have a 19mm (intended for 35mm still work) that is 180' FOV across the diagonal and is rectilinear.
Sorry, I posted photo of lenses I got from Lee above scaled to 10%, but provided 100% link as well:bmurphy wrote: ↑Thu Jul 16, 2020 3:29 amThis lens looks intriguing:
https://www.arducam.com/product/arducam ... length-af/
I'm curious to see if anybody has experience with that one.
Hermann, I see you have the 8mm lens post linked. I'll be reviewing that, you may have covered this lens in your post.