Thank you for this project! We are proud owners of two OpenMV M7 Cams.
I had the honor of participating in the OpenMV H7 cam kickstarter… and this week i received the package with the OpenMV H7 Cam + other accesories/items Today (2010/05/19) I have begun to test all the new material.
First: The cam seems works!
However i have problems with any items (LCD Shield, Wifi Shield, Ultra Wide Angle Lens) .
In this post i will only describe my problem about the Ultra Wide Angle Lens:
THE PROBLEM
I am unable to focus with the Ultra Wide Angle Lens. I have no problem with telephoto lens or normal lens. However I have to screw the lens a lot to start focusing. And then, when i am starting to focus I think I have reached the limit, and I do not want to force more. It is too hard. Effectively. I perceive the wide angle (in the Frame Buffer Screen) but too unfocused to distinguish details.
Any help or hint?
If you need more info (pictures or so), just ask for it!
Thanks in advance!
JC
PS:
My environment is Windows 10 x64. OpenMV IDE 2.2.0 The firmware is 3.4.1 (i have upgraded).
I just check my OpenMV H7 wide angle lens and have the same problem (the std lens is working fine). I tried cleaning the thread on the lens with IPA, then screwing in and repeating several time, but its made no difference. The photo of the lens shows the position where it stopped turning. As far as I can see both threads look fine and the bottom of the lens will be nowhere near the camera chip.
Lens, I get 11.86/11.87mm anywhere on the thread, does not seem to be tapered.
Base, I get 11.44mm from an avg of 6 measurements, this is harder measure accurately. Despite repeated measurements I could not convince my self was tapered, but maybe my caliper skills are not up to this!
Almost the same here, but mine works fine. Anyway I’ll forward this to our supplier, thanks for taking the time to measure it. Please order a lens mount from the store and leave a note.
It looks like a problem with some lens mounts, I’ll have more details later. For now all I can do is send you a replacement, please order another lens mount and I’ll refund. As for the other issues, please search the forums first for issues related to LCD or WiFi shields, if nothing helps go ahead and post in new posts.
Hi, some of our lenses mounts are sometimes not perfectly constructed. So, we need to send you a replacement one. Please email us about getting a replacement lens mount.
I have the same problem. The new H7 lens mount seems a lot tighter than the M7. With the normal lens the friction is “just right”. But the wide angle lens the thread is too tight to get a normal focus.
I think that it is a known issue that some of the lens mounts cannot accommodate the ultra wide lens. You can screw it in most of the way, but not enough to get proper focus. The replacement mounts they sell for $1 apiece seem to work fine.