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APQ Focal Reducer Corrector for APQ 180/1440

Special six lens aspherical design (2xCaF₂) for APQ 180/1440 Polychromat
1000mm system focal length
f/5.6 focal ratio
Ø53.1mm (3.0°) flattened image field diameter without vignetting
≤ 3.0µm (365nm – 1014nm) / Ø53.1mm (3.0°) polychromatic RMS spot radius vs. field
Ultra broad band AR coating
120mm backfocus
Lens cell made of high quality aluminum alloy
Dovetail ring S108a on the telescope side
Thread M88x1i on the camera side

Price

on request

Delivery time

on request

Inquiry

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Description
Specification
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The APQ 180/1440 Fluorite Quadruplet Polychromat is a universal planetary refractor; a system of the highest possible image quality, in which the basic system represents the polychromatic objective.

Depending on the task of observation, the basic system is combined with the Polychromatic Field Corrector or Polychromatic Focal Reducer Corrector for the APQ 180/1440 Fluorite Quadruplet Polychromat.

The diffraction-limited correction is maintained in the spectral range from 365nm to 1014nm, so that the UBVRI spectral range of modern CCD and CMOS sensors can be fully utilized.

System focal length

1000mm

Focal ratio

f/5.6

Image scale

3.438'/mm or 0.291mm/'

Image field diameter

Ø53.1mm (3.0°)

Polychromatic RMS spot radius vs. field

≤ 3.0µm (365nm – 1014nm) / Ø53.1mm (3.0°)
(theoretical)

Maximum focal shift range

±0.002% (365nm – 1014nm)
(theoretical)

Anti-reflection coating

Ultra-ARB R_AVG < 0.7% (365nm – 1014nm)
(theoretical)

Number of lenses

6 (2xCaF₂)

Backfocus

120mm

Connection on the telescope side

Dovetail ring S108a

Connection on the camera side

Thread M88x1i

Product information

APQ Polychromats

APQ 180/1440 Polychromat

APQ Reducer 180/1440