Many good features but video latency seriously limits usefulness - InfiRay Outdoor Rico Micro RH25 640 1x25mm Multifunction Thermal Weapon Sight

Video latency is the Achilles' Heel of the RH25 and many other thermal imaging scopes. iRay doesn't provide latency specs but I would estimate it to be around 200 ms. The result is that, if the user pans quickly with the device, the displayed image noticeably lags the direction in which the RH25 is pointed. This is fairly disorienting and limits the user's ability to navigate effectively using the RH25 in helmet mounted mode. The video latency also creates additional uncertainty about whether a target may have already begun moving at the time a shot has taken, limiting its use in ethical hunting. So for me the RH25 ended up being a very expensive handheld thermal camera.

But if you're a nighttime varmint hunter/pest exterminator who isn't concerned with some occasional wounding shots that aren't immediately lethal the latency may not be an issue for you at all. iRay is doing a lot of things right here and the image quality on this really is fantastic.

PROS
Very good image quality
Strong, sturdy housing
Excellent quality rubber used in buttons, eye cups, lens cover, 7-pin connector cover
Wide variety of options and features in a small handheld unit
Video output
Image storage and capture
Wifi
Capability to be externally powered through 7-pin connector
Very nice carrying case and padding
Mount included for standalone use
User's Manual is excellent - logically organized, clearly written and easy to follow
Wide range of diopter and focus adjustments

CONS
*Noticeable image latency limits device usefulness
*Latency specs not provided
Noticeable delay during calibration (auto calibration can be disabled though)
Rear eye cup is not self-sealing and allows light from view screen to escape
File system errors during menu navigation can crash device and require reboot
Undocumented small window on front of device, not described in User's Manual, that doesn't appear to do anything
Cover for 7-pin power and data port does not stay in place, makes device vulnerable to elements
Internal compass is so unreliable as to be useless