Mitutoyo

Mitutoyo objectives are often cited as being the best LWD, or at least among COTS.

Long working distance ("Series No.378")

Manual (covers using with lasers etc): Microscope:mitutoyo:objective:series 378.pdf

These are the objectives people usually refer to. Edmund Optics seems to be the official distributor although I'm not sure they carry all types such as the BD Plan.

M Plan Apo

Wavelength correction: 436 nm - 656 nm

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo 1X	0.025	11.0	200	11.0	440	N/A
M Plan Apo 2X	0.055	34.0	100	5.0	91	869
M Plan Apo 5X	0.14	34.0	40	2.0	14	650
M Plan Apo 7.5X	0.21	35.0	26.67	1.3	6.2	1220
M Plan Apo 10X	0.28	34.0	20	1.0	3.5	819
M Plan Apo 20X	0.42	20.0	10	0.7	1.6	1899
M Plan Apo 50X	0.55	13.0	4	0.5	0.9	2490
M Plan Apo 100X	0.70	6.0	2	0.4	0.6	3190

M Plan Apo High Resolution (HR)

Wavelength correction: 436 - 656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo HR 10X	0.42	15.0	20	0.6	1.55	7210
M Plan Apo HR 50X	0.75	5.2	4	0.4	0.48	5290
M Plan Apo HR 100X	0.90	1.3	2	0.3	0.34	5690

M Plan Apo Super Long (SL) working distance

Wavelength correction: 436 - 656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo SL20x	0.28	30.5	10	1.0	3.5	2899
M Plan Apo SL50x	0.42	20.5	4	0.7	1.6	3050
M Plan Apo SL80x	0.50	15.0	2.5	0.6	1.1	3750
M Plan Apo SL100x	0.55	13.0	2	0.5	0.9	4500
M Plan Apo SL200x	0.62	13.0	1	0.4	0.7	9930

G Plan Apo

Wavelength correction: 436 - 656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
G Plan Apo 20x	0.28	29.42 "in air"	10	1.0	3.5
G Plan Apo 50x	0.50	13.89 "in air"	4	0.6	1.1

M Plan Apo NIR

Wavelength correction: 480 - 1800

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo NIR 5x	0.14	37.5	40	2.0	14.0	1550
M Plan Apo NIR 10x	0.26	30.5	20	1.1	4.1	1750
M Plan Apo NIR 20x	0.40	20.0	10	0.7	1.7	3090
M Plan Apo NIR 50x	0.42	17.0	4	0.7	1.6	3750
M Plan Apo NIR 100x	0.50	12.0	2	0.6	1.1	4990

M Plan Apo NIR-HR

Wavelength correction: 480 - 1800

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo NIR-HR 50x	0.65	10.0	4	0.42	0.65	8250
M Plan Apo NIR-HR 100x	0.70	10.0	2	0.39	0.56	10200

LCD Plan Apo NIR

Wavelength correction: 480 - 1800

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
LCD Plan Apo NIR 20x(t1.1)	0.40	19.98 "in air"	10	0.7	1.7
LCD Plan Apo NIR 50x(t1.1)	0.42	17.13 "in air"	3.9	0.7	1.6
LCD Plan Apo NIR 50x(t0.7)	0.42	17.26 "in air"	3.9	0.7	1.6
LCD Plan Apo NIR 100x(t0.7)	0.50	12.11 "in air"	2	0.6	1.1

M Plan Apo NUV

Wavelength correction: 355 - 620

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo NUV 10x	0.28	30.5	20	1.0	3.5	2995
M Plan Apo NUV 20x	0.40	17.0	10	0.7	1.7	5850
M Plan Apo NUV 50x	0.42	15.0	4	0.7	1.6	5990
M Plan Apo NUV 100x	0.50	11.0	2	0.6	1.1	7550

M Plan Apo NUV-HR

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan Apo NUV-HR 50x	0.65	10.0	4	0.42	0.65	11995

LCD Plan Apo NUV

Wavelength correction: 355 - 620

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
LCD Plan Apo NUV 50x(t0.7)	0.42	14.76 "in air"	4	0.7	1.6
LCD Plan Apo NUV 50x(t1.1)	0.42	14.75 "in air"	4	0.7	1.6

M Plan UV

Wavelength correction: 266, 550

The important thing to know about these is that if you drop one on your foot you'll be balancing the hospital bill against the optics damage. At at list price of over $20,000 the 80X wins for most expensive COTS objective.

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm @ 266 nm	f mm @ 550 nm	Resolving power R um	Depth of focus +/- DF um	EO list price
M Plan UV 10x	0.25	20.0	20	20.0	1.1	2.1	11195
M Plan UV 20x	0.36	15.0	10	10.4	0.8	2.1	14900
M Plan UV 50x	0.40	12.0	4	4.5	0.7	1.7	13600
M Plan UV 80x	0.55	10.0	2.5	2.9	0.5	0.9	20900

BD Plan Apo

Wavelength correction: 436-656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
BD Plan Apo 2x	0.055	34.0	100	5.0	91
BD Plan Apo 5x	0.14	34.0	40	2.0	14
BD Plan Apo 10x	0.28	34.0	20	1.0	3.5
BD Plan Apo 20x	0.42	20.0	10	0.7	1.6
BD Plan Apo 50x	0.55	13.0	4	0.5	0.9
BD Plan Apo 100x	0.70	6.0	2	0.4	0.6

BD Plan Apo HR

Wavelength correction: 436-656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
BD Plan Apo HR 50x	0.75	5.2	4	0.4	0.48
BD Plan Apo HR 100x	0.90	1.3	2	0.3	0.24

BD Plan Apo SL

Wavelength correction: 436-656

Model	Numerical Aperature (NA)	Working distance (WD) mm	Focal length f mm	Resolving power R um	Depth of focus +/- DF um
BD Plan Apo SL20x	0.28	30.5	10	1.0	3.5
BD Plan Apo SL50x	0.42	20	4	0.7	1.6
BD Plan Apo SL80x	0.50	13	2	0.6	1.1
BD Plan Apo SL100x	0.55	13	2	0.5	0.9

QV

For machine inspection. They look similar to the LWD objectives.

Misc

They do seem to make a few "standard" objectives.

Includes:

• M50

References

2012 prices are from EO website on Feb 26, 2012

1. "Long working distance objectives". 99MBA113B3. Series No.378.
2. Edmund optics: Mitutoyo infinity corrected long working distance objectives: http:www.edmundoptics.com/products/displayproduct.cfm?productid=1942
3. Edmund optics: Mitutoyo NIR, NUV, UV: infinity corrected objectives: http:www.edmundoptics.com/products/displayproduct.cfm?productid=1950