Quote History Originally Posted By Rich_V:
The Zeus has a smaller FoV compared to the Thor. I assume this corresponds to a higher magnification on the Zeus vs. Thor despite both stating a 3x optical magnification?
From the Zeus specs:
OPTICAL DATA:
Field of View:
 ang. X degrees: 7.8
 ang. Y degrees: 5.9
Objective Focal Length: 42 mm
From the Thor specs:
Field of View (H x V) 9°x 7°
Lens 30 View Quote View All Quotes View All Quotes Quote History Originally Posted By Rich_V:
Originally Posted By cj7hawk:
Originally Posted By MrBearClaw:
More information through a 42mm lens. Depending on the screen resolution and size it could go either way for detection range. It's going to be very close to the same image(in theory)
Assuming that the speed of the lenses is roughly the same, and the same detector ( 17 uM )
42mm lens will offer 1.4x more magnification than a 30mm lens. So detection range, etc, increased by a factor of 1.4
FOV ( Horizontal ) 
30mm = 21.6
42mm = 15.5
Regards
David
The Zeus has a smaller FoV compared to the Thor. I assume this corresponds to a higher magnification on the Zeus vs. Thor despite both stating a 3x optical magnification?
From the Zeus specs:
OPTICAL DATA:
Field of View:
 ang. X degrees: 7.8
 ang. Y degrees: 5.9
Objective Focal Length: 42 mm
From the Thor specs:
Field of View (H x V) 9°x 7°
Lens 30
Ahh, woops, my maths was out  forgot to halve the original width of the array. That should be
10.9 degrees  30mm.
7.8 degrees  42mm.
The maths, BTW, is the pitch in micron, divide by 1000 and multiply by the array size ( pixels ) 
Then halve this, and divide by the focal length in mm.
Then find the arctan of the resultant number and multiply by two.
This will provide the FOV for any array of known pitch and resolution.
Regards
David
