What do you need it to do at 1000m? Check if a building / tower / structure is still standing? Cause that’s about what you’ll get at 1000m from a torch with an ANSI F1 throw of 1000m. The spec is for 0.25lux on target, moonlight is about 0.3lux so if you need to actually make a object that’s 1000m away bright enough to do some sort of work you’ll need much more than 1km of throw in reality.
What’s the size / shape of the objects you need to light up and what work needs to be performed? If it’s anything more than “yep that object still exists”, and it really is 1km away then you’re gonna need way more than 1000m of ANSI F1 throw!
A little more detail will help us get you the best recommendation for your needs.
Basically I work in telcom work and sometime telcom tower is installed in an area where there is a fence and part of the work scope (apart from checking fence there are other works need to be done) we need to check the fence if they are good and no rip on it.
We carry work on night as less interruption to customers , and when I am at one end of the fence I would like to sight or have a quick look at the other end of the fence,,,I would say other end around 800 m or 850 m
BLF GT70, is 5lbs or more with batts. MF04/S is about 2lbs, my MF04S has no donut like my GT70 and out shines the GT70 in distance and beam.
In addition the mf04/s can be had for about $100 less than the GT/70
Worth watching the video (at the end of the review) from about 12.30mins on to see a comparison between the laser L2K, an aspheric thrower, and a reflectored thrower.
Curious….the flashlight could reach 800 meters, but how see that far? I don’t think i can see a cut in a chain link fence in daylight that far without binoculars, never mind at night.
In the pictures are my flashlights. The TN42 has a really large range. As you will see from such a large distance depends on many other factors. Air cleanliness, overall brightness of the surroundings, season …