Mitutoyo 50x LCD Plan APO NUV Objective - 378-820-4. This long working distance objective maintains focus from visible through the near-ultraviolet spectrum which makes it perfect for YAG-laser applications. This lens has cover glass thickness compensation for glass of 0.7mm thick.

SPECIFICATIONS
Type:	Infinity Corrected Brightfield
Wavelength:	Visible & NUV
Magnification:	50x
Glass Thickness:	0.7mm
N.A.:	0.42
Working Distance:	14.76mm
Wavelength Range:	355nm to 620nm
Focal Length:	4mm
Resolving Power:	0.7µm
Focal Depth:	1.6µm
Field of View with Ø24 Eyepiece	Ø0.48
Real Field of View with 1/2" Chip Camera	0.10 x 0.13
Thread Size:	M26
Part Number:	378-820-4