Transcript
Distagon T* 2,8/25 ZF
Features x x x x x x x
Low close-range adjustment (6 cm / 2.4") from object to front lens surface Optimal control of flare and stray light Precise manual focusing Robust full-metal construction Identical color reproduction of all models assures the quality of products measured by hue difference For industrial cameras with F-Mount up to sensor sizes of 24x36 mm. Mounts and optical coatings can be modified on request
10/09 · Subject to change.
W W W. S T E M M E R- I M A G I N G . C O M
ZF-I: Industrial Edition Features special screws to fix focus and aperture settings also in rough situations. ZF-IR: Infrared Edition Features special coating for optimized performance in near-infrared applications. Camera Mounts Available for other camera mounts such as EF, K or M42 screw mount.
Carl Zeiss AG · www.zeiss.com/lenses4industry
Distagon T* 2,8/25 ZF Technical Specifications
Focal length Aperture range Number of elements / groups Working distance (object to sensor) Angular field* (diag. / horiz. / vert.) Max. diameter of image field Flange focal length Coverage at close range Image ratio at close range Filter-thread Length (without caps)** Diameter Weight Camera mount***
25 mm f/2.8 – f/22 (1/ 2 stop intervals) 10 / 8 0.17 m (0.56 ft) – Ð 80 / 70 / 50° 43 mm (1.7") 46.5 mm (1.8") 55 x 83 cm (22 x 33") 1: 2.3 M 58 x 0.75 66.5 mm (2.6") 64 mm (2.5") 480 g (17 oz.) ZF (F bayonet)
* referring to 35 mm format ** from bayonet mount to filter thread when lens focused to infinity *** other mounts available on request
10/09 · Subject to change.
W W W. S T E M M E R- I M A G I N G . C O M
Carl Zeiss AG · www.zeiss.com/lenses4industry
Distagon T* 2,8/25 ZF Relative Illuminance E [%] 100
The relative illumination shows in percent the decrease in image brightness from the image center to edge.
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60
__ f-number 2.8 … f-number 5.6
40
20
0 0
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10
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20 u'[mm]
Relative Distortion V [%] 3,0
The relative distortion shows in percent the deviation of the actual from the ideal image height.
2,0 1,0 0,0 -1,0 -2,0 -3,0 0
5
10
15
20 u'[mm]
10/09 · Subject to change.
W W W. S T E M M E R- I M A G I N G . C O M
Carl Zeiss AG · www.zeiss.com/lenses4industry
Distagon T* 2,8/25 ZF MTF Charts MTF [%] k=2.8 100
The Modulation Transfer (MTF) as a function of image height (u) and slit orientation (sagittal, tangential) has been measured with white light at spatial frequencies of R = 10, 20 and 40 cycles/mm.
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0 0
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u' (mm)
20
f-number 2.8 __ Saggital … Tangential
MTF [%] k=5.6 100
f-number 5.6 __ Saggital … Tangential
80
MTF (%)
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40
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0 0
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10
10/09 · Subject to change.
W W W. S T E M M E R- I M A G I N G . C O M
15
u' (mm)
20
Carl Zeiss AG · www.zeiss.com/lenses4industry
Distagon T* 2,8/25 ZF Depth of Field Object distance 1.00 m (3.28 ft) 0.91 – 1.12 m (2.98 – 3.67 ft) 0.87 – 1.18 m (2.85 – 3.87 ft) 0.83 – 1.27 m (2.72 – 4.17 ft) 0.78 – 1.45 m (2.56 – 4.76 ft) 0.72 – 1.75 m (2.36 – 5.74 ft) 0.64 – 2.77 m (2.10 – 9.09 ft) 0.57 – 10.00 m (1.87 – 32.81 ft) O-ZEIO6-09/2013 ∙ Subject to technical change without notice. No liability is accepted for errors which may be contained in this document.
Aperture f / 2.8 f /4 f / 5.6 f/8 f /11 f /16 f / 22
Field range Object distance 3.00 m (9.84 ft) 2.22 – 5.00 m (7.28 – 16.40 ft) 2.00 – 6.00 m (6.56 – 19.68 ft) 1.77 – 11.00 m (5.81 – 36.09 ft) 1.51 m –Ð (4.95 ft –Ð ) 1.28 m –Ð (4.20 ft –Ð ) 1.03 m –Ð (3.38 ft –Ð ) 0.84 m –Ð (2.75 ft – Ð)
W W W. S T E M M E R- I M A G I N G . C O M . I M A G I N G I S O U R PA S S I O N GERMANY AU ST R I A 10/09 Phone: +49 89 80902-0
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UNITED KINGDOM
FRANCE
Phone: +44 1252 780000
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Phone: +33 1 45069560
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IRELAND · Subject to change.
SW I T Z E R L A N D L I E C H T E N ST E I N Phone: +41 55 415 90 90
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THE NETHERLANDS B E LG I U MCarl . L U XZeiss E M B OAG U R G· Phone: +31 575 495159
[email protected]
www.zeiss.com/lenses4industry
