How to post on WWX	Latest Listings!
	more...  in  ALL  ONLY Microscopes

Serving  Our Guest Log in    Register

How to post your own listings

View prices in  $ or ...

ALL CATEGORIES   Semiconductor Mfg   Metrology Eq   Wafer Inspection   Microscope Inspect

View   Search-by-Specs    Input    Edit

	View All Offers Under Microscopes » Switch Major Category		Click an item's ID# below for its full specifications and source, or: Group Offers into sub-categories under Microscopes List all 33 product types under Microscopes

To sort on a column, click the column head; click it again to reverse the sort. Click the links under the Product Type column head to see other like items of that type.
Displaying 101-181 of 181  Page    1  2

	Item ID	Photo	Short Description		Product Type / Details	#		Price	Notes	Location
			Make	Model
								$
	195939	Nikon	Nikon	SMZ-10	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 7X - 40X : Stereomicroscope with Transmitted Light Base	1		1,250.33		Scotia, New York
	195931	Nikon	Nikon	SMZ-10	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 7X - 40X: Stereomicroscope	1		1,400.38	F*	Scotia, New York
	93710	Nikon	Nikon	SMZ-10	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 7X - 40X: Stereomicroscope with Transmitted Light Stand	1		2,500.67		Scotia, New York
	108190	Nikon	Nikon	SMZ-1B ESD	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 8X - 28X: Stereomicroscope ESD	3		1,175.31	F*	Scotia, New York
	127744	Nikon	Nikon	SMZ-645	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 8X-50X: Stereomicroscope	1		1,100.29		Scotia, New York
	110921	Nikon	Nikon	SMZ-6	Stereo Microscopes in Optical Microscopes NIKON STEREOMICROSCOPE 9X - 40X: Stereomicroscope	1		1,175.31		Scotia, New York
	245327	Nikon	Nikon	Ti2-E	Inverted Microscopes in Optical Microscopes Nikon Ti2-E Inverted Microscope: Nikon Ti2-E Inverted MicroscopeTi2-E Binocular Viewing Head with 2ea CFI 10X Eyepieces Nikon Ti2-N-ND-E Motorized DIC Sextuple Nosepiece, Including: Nikon Plan Fluor 10X Objective lens Nikon S Plan Fluor 40X ELWD Objective lens Nikon Plan APO 100X Objective lens Nikon Ti2-F-FLT-E Motorized Epi-Fluorescence Filter Cube Turret Nikon Ti2-LA-FL Epi-Fluorescence Illuminator Module Nikon TC-S-SR Specimen Stage with C-S-HU Universal Holder Nikon Ti2-CTRE Microscope Controller Hamamatsu C11440-42U30 ORCA-Flash4.0LT+ CMOS Camera Lumencor Sola SE 5-LCR-VB Light Engine with Light Engine Control	1				Santa Cruz, California
	61043	Nikon	Nikon	Optiphot	Wafer Inspection Microscopes in Optical Microscopes Nikon/Semprex Measuring Microscope:  NIKON/SEMPREX Wafer Measuring Microscope 4 Position Turret NIKON MPlan 2.5X, BDPlan 10X, 20X & 40X Objective Lenses NIKON Binocular Viewing Head with 10X Widefield Eyepieces NIKON Vertical Illuminator with 12V/50W Halogen Lamp Housing Brightfield & Darkfield Channels Dual Iris Apertures NIKON Model UN Illumination Transformer SEMPREX Microscope Stand Specimen Stage 6” X 6.75” 2ea Mitutoyo 164-136 Digital Micrometers for XY Measurement 0-2” in X Axis & 0-1.5” in Y Axis; Resolution to 0.0001” Mitutoyo 534-223-1 Digital Micrometer for Height Measurement 0-1” in Z Axis; Resolution to 0.0001”	1			F*	Plano, Texas
	160214	Olympus	Olympus	BH-BHM	Wafer Inspection Microscopes in Optical Microscopes Olympus BH-BHM Microscope: Wafer Inspection Microscope	1			F*	Plano, TX
	88258	Olympus	Olympus	BH2-UMA	Microscopes - Other in Optical Microscopes OLYMPUS DISK INSPECTION MICROSCOPE/MOTORIZED STAGE: Disk Inspection Microscope/Motorized Stage	1			F*	Scotia, New York
	1836	Olympus	Olympus	E-Arm	Parts and Accessories - Other in Parts and Accessories, Microscope OLYMPUS E-ARM: E-Arm Available Only with purchase of a Olympus StereoZoom Microscope	3		100.03		Scotia, New York
	112800	Olympus	Olympus	SZ-STB1	Parts and Accessories - Other in Parts and Accessories, Microscope OLYMPUS E-ARM: E-Arm Available only with purchase of Olympus Stereo Zoom Microscope	4		140.04	F*	Scotia, New York
	114095	Olympus	Olympus	Focusing Stand	Stands in Parts and Accessories, Microscope OLYMPUS FOCUSING STAND: Type A Stand	1		180.05	F*	Scotia, New York
	110842	Olympus	Olympus	SZX-STL	Stands in Parts and Accessories, Microscope OLYMPUS MICROSCOPE STAND: StereoZoom Microscope Stand w/ Light Source Transmitted light StereoZoom microscope stand w/ light source and mechanical stage. Available only with purchase of Olympus or Nikon StereoZoom Microscope.	1				Scotia, New York
	128483	Olympus	Olympus	MX50-AF	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED LIGHT: Reflected Light Microscope	2			F*	Scotia, New York
	169420	Olympus	Olympus	MX50A-F	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED LIGHT: Brightfield Darkfield and DIC	1				Scotia, New York
	169421	Olympus	Olympus	MX50T-F	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED LIGHT: Brightfield Darkfield     NB: Qimaging Camera and phototube shown are not included.	1			F*	Scotia, New York
	100822	Olympus	Olympus	BH2-UMA	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED LIGHT - BRIGHTFIELD, DARKFIELD/DIC: Reflected Light Microscope	1				Scotia, New York
	114218	Olympus	Olympus	MX50-CF	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED LIGHT - BRIGHTFIELD, DARKFIELD/DIC: Reflected Light Real-Time Confocal Microscope	1			F*	Scotia, New York
	46970	Olympus	Olympus	BH2 BHT	Upright Microscopes in Optical Microscopes OLYMPUS MICROSCOPE, REFLECTED/TRANSMITTED: Reflected and Transmitted Scope Brightfield Only	1			F*	Scotia, New York
	124324	Olympus	Olympus	AX70	Upright Microscopes in Optical Microscopes OLYMPUS RESEARCH MICROSCOPE: Universal Infinity System	1				Scotia, New York
	94266	Olympus	Olympus	MX50T-F	Wafer Inspection Microscopes in Optical Microscopes OLYMPUS SEMICONDUCTOR INSPECTION MICROSCOPE: Semiconductor Inspection Microscope Reflected and Transmitted Light	1				Scotia, New York
	185484	Olympus	Olympus	SZ3060	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 10X - 40X: Stereo Microscope and Boom Stand   Fostec/Kramer light source and dual light pipe in photos are not included. Please inquiry on availability.	1				Scotia, New York
	28015	Olympus	Olympus	SZ3060	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 10X - 40X: Stereo Microscope	7			F*	Scotia, New York
	1892	Olympus	Olympus	VMZ	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 10X - 40X: Stereo Zoom Microscope (stand not included)	3		500.13		Scotia, New York
	148313	Olympus	Olympus	SZ4045	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 7X - 40X: Stereo Zoom Microscope	1				Scotia, New York
	1969	Olympus	Olympus	SZ4045 ESD	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 7X - 40X: ESD Stereo Zoom Microscope With ESD Incident Light Stand	6				Scotia, New York
	93496	Olympus	Olympus	SZ3060ESD	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO MICROSCOPE 9X - 40X: Stereo Zoom Microscope	1				Scotia, New York
	1970	Olympus	Olympus	SZ4045	Stereo Microscopes in Optical Microscopes OLYMPUS STEREO ZOOM MICROSCOPE 7X - 40X: Stereo Zoom Microscope	1				Scotia, New York
	120405	Olympus	Olympus	SZ3060	Stereo Microscopes in Optical Microscopes Olympus SZ3060: StereoZoom Microscope	1			F*	Plano, TX
	120406	Olympus	Olympus	SZ3060	Stereo Microscopes in Optical Microscopes Olympus SZ3060: StereoZoom Microscope	1			F*	Plano, TX
	217522	Olympus	Olympus	STM6-F00-3	Measuring Microscopes in Optical Microscopes OLYMPUS TWO AXIS MEASURING MICROSCOPE 150MM X 100MM 0.5 MICRON: Olympus Measuring Microscope	1			F*	Scotia, New York
	2601	Reichert-Jung	Reichert-Jung	Photostar	Parts and Accessories - Other in Parts and Accessories, Microscope REICHERT AUTOMATIC CAMERA SYSTEM: Automatic Camera System Fits 1 1/8" diameter phototube	1			F*	Scotia, New York
	149933	Reichert Inc	Reichert Inc	Ultracut S-EM FCS	Sample Preparation - Other in Sample Preparation REICHERT/LEICA LOW TEMPERATURE SECTIONING SYSTEM: Low Temperature Sectioning System	1			F*	Scotia, New York
	245895	RVSI, ws3500/3800 upgrade, s/n: ws-3015, 32a4qa	RVSI, ws3500/3800 upgrade, s/n: ws-3015, 32a4qa		Other Items in Microscopes RVSI, ws3500/3800 upgrade, s/n: ws-3015, 32a4qa: RVSI, ws3500/3800 upgrade, s/n: ws-3015, 32a4qa RVSI VISUAL DEFECT SCANNER	1				Burlington, Vermont
	245894	RVSI, ws3500/3800 upgrade, s/n: ws-3016, 32a4ra	RVSI, ws3500/3800 upgrade, s/n: ws-3016, 32a4ra		Other Items in Microscopes RVSI, ws3500/3800 upgrade, s/n: ws-3016, 32a4ra: RVSI, ws3500/3800 upgrade, s/n: ws-3016, 32a4ra inspection scanner	1				Burlington, Vermont
	90691	Schott Fostec	Schott Fostec	20500	Fiber Optic Light Sources in Fiber Optic Illuminators SCHOTT FOSTEC FIBER OPTIC LIGHT SOURCE: Fiber Optic Light Source	1		150.04		Scotia, NY
	110924	Semprex	Semprex	102-401	Stands in Parts and Accessories, Microscope SEMPREX MICROSCOPE STAND: Microscope Stand w/ Transmitted Light Stage Microscope Stand Microscope and E-arm not included	1				Scotia, New York
	109386	Semprex	Semprex	D102	Stands in Parts and Accessories, Microscope SEMPREX MICROSCOPE STAND: Microscope Stand w/ Transmitted Light Stage Microscope Stand Microscope and E-arm not included	1				Scotia, New York
	115712	Semprex	Semprex	102-401	Stands in Parts and Accessories, Microscope SEMPREX MICROSCOPE STAND INCIDENT LIGHT: Microscope Stand with Stage Semprex Model 102-401	1				Scotia, New York
	112806	UNKNOWN 0.75X OBJECTIVE	UNKNOWN 0.75X OBJECTIVE		Parts and Accessories - Other in Parts and Accessories, Microscope UNKNOWN 0.75X OBJECTIVE: Fits Nikon and Olympus Stereo Zoom Microscope	2		115.03		Scotia, New York
	23995	Vision Engineering	Vision Engineering	Dynascope	Microscopes - Other in Optical Microscopes Vision Engineering - Dynascope: Projection Microscope	1				Plano, TX
	184775	Vision Engineering	Vision Engineering	SX 45	Stereo Microscopes in Optical Microscopes VISION ENGINEERING STEREO MICROSCOPE 8X -- 50X: Stereo Microscope	1			F*	Scotia, New York
	129738	Volpi	Volpi	6000-1	Fiber Optic Light Sources in Fiber Optic Illuminators VOLPI FIBER OPTIC LIGHT SOURCE: Fiber Optic Light Source Unused Surplus	1		350.09	F*	Scotia, New York
	225623	Well	Well	3032-4	Sample Preparation - Other in Sample Preparation WELL PRECISION DIAMOND SAW: Diamond Saw	1			F*	Scotia, New York
	150611	Wild	Wild	Makroskop M450	Stereo Microscopes in Optical Microscopes WILD EPI MAKROSKOP STEREOMICROSCOPE : Stereomicroscope	1			F*	Scotia, NY
	4120	Wild	Wild	MPS51S	Cameras and Controllers in Optical Microscopes WILD FULLY AUTOMATIC CAMERA SYSTEM: Fully Automatic Camera System Currently configured for Polaroid 4 x 5 photos, but may be used for 35mm photography with appropriate accessories.	1				Scotia, New York
	226448	Wild	Wild	Apozoom	Stereo Microscopes in Optical Microscopes WILD LEITZ APOZOOM STEREO MICROSCOPE: Reflected and Transmitted Light Nomarski Prism and λ/4 Wave Plate XY Stage with Encoders and Readout	1				Scotia, New York
	4121	Wild	Wild	MPS11	Cameras and Controllers in Optical Microscopes WILD MANUAL SEMI-AUTOMATIC CAMERA SYSTEM: Manual/Semi-automatic Camera System Currently configured for Polaroid 4 x 5 photos, but may be used for 35mm photography with appropriate accessories.	1				Scotia, New York
	1172	Wild	Wild	M7A-DiscussionScope	Stereo Microscopes in Optical Microscopes WILD STEREO DISCUSSION MICROSCOPE: Stereo Zoom Discussion Microscope	1				Scotia, New York
	86191	Wild	Wild	M8	Stereo Microscopes in Optical Microscopes WILD STEREO MICROSCOPE 6X - 50X: Stereo Zoom Microscope	1		2,750.74	F*	Scotia, New York
	132944	Wild	Wild	M8	Stereo Microscopes in Optical Microscopes WILD STEREO MICROSCOPE 6X - 50X: Stereo Zoom Microscope with Transmitted Light Stand	1		3,100.83		Scotia, New York
	1875	Wild	Wild	M3Z	Stereo Microscopes in Optical Microscopes WILD STEREO MICROSCOPE 7X - 40X: Stereo Zoom Microscope Drive Housing, Stand, and Main Objective not included	2		1,425.38	F*	Scotia, New York
	1877	Wild	Wild	M7A	Stereo Microscopes in Optical Microscopes WILD STEREOMICROSCOPE 6X - 31X: Stereo Zoom Microscope With Boom Stand	1		2,100.56	F*	Scotia, New York
	1879	Wild	Wild	M7A	Stereo Microscopes in Optical Microscopes WILD STEREOMICROSCOPE 6X - 31X: Stereomicroscope With Swing Arm Stand	1		2,100.56		Scotia, New York
	112608	Wild	Wild	M7A	Stereo Microscopes in Optical Microscopes WILD STEREOMICROSCOPE 6X - 31X: Stereomicroscope With Boom Stand	1		2,920.78		Scotia, New York
	150609	Wild	Wild	M8	Stereo Microscopes in Optical Microscopes WILD STEREOMICROSCOPE 6X - 50X: Stereomicroscope With Incident Light Stand	1			F*	Scotia, New York
	113156	Wild	Wild	Makroskop M410	Stereo Microscopes in Optical Microscopes WILD STEREOMICROSCOPE MACROZOOM 1:5 OBJECTIVE: Stereomicroscope With Transmitted Light Stand	1				Scotia, New York
	1891	Wild	Wild	346910	Parts and Accessories - Other in Parts and Accessories, Microscope WILD TUBE WEDGE: With 15 degree incline Used with Wild M3 and M8 series scopes.	1		300.08		Scotia, New York
	108903	Zeiss	Zeiss	47 56 39	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT BASE: Axiomat Base Zeiss 47 56 39	2			F*	Scotia, New York
	108907	Zeiss	Zeiss	47 56 19-9900	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT BINOCULAR BODY: Binocular Body Zeiss 47 56 19-9900	4			F*	Scotia, New York
	1927	Zeiss	Zeiss	475620	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT CAMERA MODULE: Camera Module Zeiss 475620	2				Scotia, New York
	166599	Zeiss	Zeiss	AXIOMAT	Upright Microscopes in Optical Microscopes ZEISS AXIOMAT MICROSCOPE: Reflected/Transmitted Light Microscope Brightfiled/Darkfield/DIC	1			F*	Scotia, New York
	108859	Zeiss	Zeiss	47 58 57	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT NOSE PIECE: Nose piece Zeiss 47 58 57	2				Scotia, New York
	108775	Zeiss	Zeiss	47 56 01-9900	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT OBJECTIVE MODULE: Objective Module Zeiss Axiomat 47 56 01-9900	2				Scotia, New York
	1925	Zeiss	Zeiss	47 56 01-9902	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT OBJECTIVE MODULE: Objective Module Zeiss 47 56 01-9902	1				Scotia, New York
	108792	Zeiss	Zeiss	47 56 05	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT OBJECTIVE MODULE S: Objective Module S Zeiss 47 56 05	2				Scotia, New York
	1926	Zeiss	Zeiss	475610	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT OBSERVATION MODULE: Observation Module Zeiss 47 56 10	3				Scotia, New York
	108888	Zeiss	Zeiss	47 56 36	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS AXIOMAT STAGE CARRIERS: Stage Carriers Zeiss 47 56 36	1				Scotia, New York
	239048	Carl Zeiss	Carl Zeiss	Discovery V12	Stereo Microscopes in Optical Microscopes	1			F*	Scotia, New York
	167282	Zeiss	Zeiss	GLAREX (47 56 24 - 9901)	Parts and Accessories - Other in Parts and Accessories, Microscope ZEISS GLAREX PROJECTION SCREEN: 8" Projection Screen For use with Zeiss AXIOMAT See our Zeiss AXIOMAT (Item number 166599)	1			F*	Scotia, New York
	116331	Zeiss	Zeiss	UEM	Upright Microscopes in Optical Microscopes ZEISS INDUSTRIAL MICROSCOPE, REFLECTED LIGHT/BRIGHTFIELD : Reflected Light/Brightfield Industrial Microscope	1			F*	Scotia, New York
	73153	Zeiss	Zeiss	ICM 405	Inverted Microscopes in Optical Microscopes ZEISS INVERTED MICROSCOPE, BRIGHTFIELD AND DIC: Inverted Microscope Brightfield and DIC	1			F*	Scotia, New York
	1974	Zeiss	Zeiss	None	Microscopes - Other in Optical Microscopes ZEISS LIGHT SECTION MICROSCOPE: Light Section Microscope	2				Scotia, New York
	2277	Zeiss	Zeiss	AXIOTRON	Upright Microscopes in Optical Microscopes ZEISS MICROSCOPE, REFLECTED LIGHT - BRIGHFIELD: Reflected Light Microscope	1				Scotia, New York
	40028	Zeiss	Zeiss	Universal	Upright Microscopes in Optical Microscopes ZEISS MICROSCOPE, REFLECTED/TRANSMITTED LIGHT: Reflected/Transmitted Light Microscope, Brightfield and DIC	1			F*	Scotia, New York
	10393	Zeiss	Zeiss	AXIOTRON	Upright Microscopes in Optical Microscopes ZEISS MICROSCOPE. REFLECTED LIGHT- BRIGHTFIELD: Reflected Light Microscope	2			F*	Scotia, New York
	245328	Zeiss	Zeiss	Smartzoom 5	Microscopes - Other in Optical Microscopes Zeiss Smartzoom 5 Digital Microscope: Zeiss Smartzoom 5 Digital Microscope Zeiss Model D Tiltable Stand (G) Item No. 430040-9000-000 Motorized Z-Drives for Focusing & Pivot Point Adjustment Tilting angle ≤ 45° Zeiss Smartzoom 5 Optical Engine (G) Item No. 425525-9010-000  Integrated 10x Zoom Integrated Coaxial LED illumination Integrated CMOS Camera Zeiss 10X Plan Apo D Objective Part No. 435230-9040-000 NA = 0.6, FWD 10 mm Integrated Segmented LED Illumination Integrated Data Output on Magnification & Optical Correction Factors Zeiss 1.6X Plan Apo Objective NA = 0.1, FWD 36 mm Integrated Segmented LED Illumination Integrated Data Output on Magnification & Optical Correction Factors Zeiss Scanning Stage D 130 X 100 STEP Item No. 432038-9000-000 Stage Flat Surface Area: 310 mm X 223 mm XY Travel: 130 mm X 100 mm Absolute Accuracy: +/- 5 µm Reproducibility: ≤ 1 µm Stepper Motor with 4 mm Spindle Pitch Integrated Controller Interchangeable Stage Inserts: 160 mm X 116 mm Metal Stage Insert Included Lenovo ThinkCentre All-in-One Control PC for Smartzoom 5 Item No. 432915-9105-000 Full HD 24” Display & Integrated PC with Windows 10 2019 LTSC includes Smartzoom Acquisition 2D/3D Measurement & Reporting Software with 3D/EDF (Extended Depth of Focus) Imaging 3D/EDF Stitching & Job Mode with Individual Referencing Data, Configuration & System Calibration	1				Santa Cruz, California
	974	Zeiss	Zeiss	STEMI SV8	Stereo Microscopes in Optical Microscopes ZEISS STEREO MICROSCOPE 13X - 102X: Stereo Zoom Microscope	1			F*	Scotia, New York
	86	Zeiss	Zeiss	STEMI SV8	Stereo Microscopes in Optical Microscopes ZEISS STEREO MICROSCOPE 8X - 64X: Stereo Zoom Microscope w/Photo Tube	1				Scotia, New York
	244284	Zeiss	Zeiss	Merlin	Scanning Electron Microscopes in Inspection Equipment ZEISS, Merlin, sn: 4234, Zeiss Merlin Scanning Electron Microscope: ZEISS, Merlin, sn: 4234, Zeiss Merlin Scanning Electron Microscope	1				Malta, New York
Displaying 101-181 of 181  Page    1  2

*   Vendor Role: Mfr is Manufacturer; Sup is Supplier/Distributor; OEM is Original Equipment Manufacturer

NOTE:
   photo available
   reference document attached
  F* if the item is specially featured
  N* if the item is newly added, and/or
  R* if the item's price is recently reduced.

Items from the following manufacturers are offered under Microscopes: American Optical, Anatech Ltd, Applied Materials, Inc., ATM GmbH, Bausch & Lomb, Inc, Bausch and Lomb, Buehler, Carl Zeiss, CPS, Dage-MTI, DELTRONIC, Denton, Diagnostic Instruments, Dolan Jenner, FEI, Fostec, Gatan, Hitachi, HMI, HSEB, Karl Storz, KLA-Tencor, Leco, Leica, Leica, Leitz, Melles Griot, Microspec, Mitutoyo, Nikon, Olympus, Reichert Inc, Reichert-Jung, Schott Fostec, Semprex, Vision Engineering, Volpi, Well, Wild, Zeiss