OBJECTIVE LENSES

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250mm (9.8") F/11 R30

EVERY SINGLE ISTAR LENS IS INDEPENDENTLY TESTED TO ASSURE CONSISTENTLY HIGH QUALITY. WE USE TWO TEST METHODS, RONCHI, and INTERFEROMETER TEST (TESTED TWICE BY 90-DEGREE ROTATION TO OBTAIN THE MOST ACCURATE DATA).

WE HAVE INCORPORATED SPECIAL HEAVY (SHORT) FLINT GLASS IN ALL R30, R35 AND R50 DOUBLET DESIGNS IN ORDER TO REDUCE CHROMATIC ABERRATION AND INCREASE RESOLUTION.

250 mm (9.8") F/11 R30

$5,862.00

Item Description

Lens Diameter

Clear Aperture

No of Elements

Focal Length

F-Ratio

Type of Coating

Fully Multicoated

Weight (incl. cell)

Cell O.D.

HandFigured

Minimum Surface Quality

Achromatic R30 (Anastigmatic) Hand Figured Doublet in Push-Pull style cell

254 mm

250 mm

2

2712 mm

F/11

SiO2 Broadband Multilayer Film (Yellow)

YES

13.86 Kg

292 mm

YES

PV/4

(LNAN.250.110)