Quote:
Originally Posted by Poacher886
I'll give it ago, though 1200-1500m is very short, and would allow for alot of error. Im finding im having to take shots at 3000m+ even in the dark.
That said, its the radio messages of "Submarine sighted" that are causing me to take immediate action at range, though i've not noticed the convoy's speeding up and veering off once they have "indicated" they have seen me!
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On 1200m I don't even need TDC
.
Convoys don't speed up after spotting you because convoy's speed is adjusted to slowest ship speed (as in real life) and if speed of convoy 10 kts what they going to increase it to? 11-12? Instead they starting zigzagin as anti-torpedo maneuvers. And slow down usually to half of original speed.
I chose
emtguf over Manos or MRP. It's like an eye -opener after others. Takes most of my 26" 1960x1200 screen, other scopes are like peeking through door lock hole compare to this one. I love MRP's crosshair (for some reason everyone is making lines and bars in FOV (Field Of View) as tick as a blue wale tongue). In real periscopes lines are thick enough for just to see them - thinner they are - more presicion with measurements taken via observations.
Another thing that I don't get at all - why Arclight after all that titanic work desided to darken view in his scope enough to watch spots on the Sun in real life? I am amateur astronomer (at least used to be) and know thing or two about optics. It's so God damn dark that he even came up with "Light" version of the mod but still too dark to my taste.
Where those ideas about "periscope is hardly usable at night" come from? If you think about it - ALL THE TELESCOPES HAVE TO BE TROWN AWAY because it's a night time.
Germans had BEST OPTICS during 20th century period. They optics were anti-light reflection coated way before anyone would even consider it. German naval artillery was feared by every British ship crew. Because of two factors. Krupp steel precision made guns, unmatched by anyone in the world. And Karl-Zeiss optical range finders. Also unmatched by anyone in the world. That's why German battleship was able to open EFFECTIVE fire BEFORE British were able to answer with more or less acceptable presicion. That's how HMS Hood was sunk by Bismark in the first salvo.
I've learn all of this from my teachers in Naval academy because my specialty was ship's firepower.
Now back to German periscopes and how dark image could be. Light entering optical tube (periscope is folded kind of tube, got two 90 degree light path bends) got reflected of any optical surface (like glass or aluminum used for mirror coating). Uncoated glass surface can reflect back about 15-20% of the light thus making passed light "weaker" (darker) letting about 80-85% of light pass trough. Light also could be dispersed inside of matter like thick glass (periscopes used prisms). There is 3 ways to fight it.
1. Reduce amount of lenses (need advanced optics design skills that Germans had).
2. Use anti-reflection coating (that Germans developed) that will let about 93% or more of photons to pass through.
3. Use highest quality aluminum coating for mirror parts (they got it covered as well) that allows 99% or more of photons to be reflected (redirected) down the light path.
4. Increase aperture of the objective.
Slight increase of aperture does miracles because it is proportionate to the square increase in light amount entered the scope. I do believe that German builders were able to create adequate aperture for the purpose.
Light will end up in 5-9mm circle. that represent size of the human's dark-adapted eye pupil. It can't be bigger than this - just no use for more. So if we just open tube on the front end a little - we got huge increase of photons reaching our retina.
Last thing. During night observations (astronomical or military etc.) it is very important to keep eyes dark adaptation. That's why all astronomical flashlights have
red filter on. That's why any illuminated eyepiece have
RED illumination inside of it. Not
Green.
Green kills dark adaptation, you have to spend another 15-30 minutes to get adapted to darkness again (eye's pupil opens as wide as possible).
Now you probably know why sub have
red interior light at night, not the strobes or laser show like in night clubs?
