I bought mine E4 on EBay already upgraded to (320x240 & Menu).
Thanks to whole team here, who made it possible.
Mostly, the unit works pretty well, but sometimes I see bunch of hot pixels on top right corner (most pronounced).
Sometime it not appears at all, sometime disappears after N calibrations (most often N=2).
I suspect, that FLIR could use sensors with some defects outside 80x60 area.
Anyway, the overall quality is great, much better than Flir One G2.
I noticed, when I making series of photos (same subject), N is good quality, than N+1 ... N+m have lots of grain, than good again.
So, I have 3 questions, may be somebody could help:
1. Can I force calibration, pressing some button (like on Exx series)?
2. May be I can do something more permanent ( kind of remapping)?
3. What can it be (especially about series of photos in almost identical conditions)?
Here the examples: (1 - with this problem, 2 - without this problem, 3 - with this effect only, almost uniform surface )
With proper stacking, the quality is amazing:(4 th example)