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APQ Focal Reducer Corrector for APQ 180/1440

Special six-lens aspherical design (2×CaF₂) for APQ 180/1440 Polychromat
1000 mm system focal length
f/5.6 focal ratio
Ø53.1 mm (3.0 °) flattened image field diameter without vignetting
≤ 3.0 µm (365 nm – 1014 nm) / Ø53.1 mm (3.0 °) polychromatic RMS spot radius vs. field
ultra-broadband AR coating
120 mm backfocus
Lens cell made of high-quality aluminum alloy
Dovetail ring S108a on the telescope side
Thread M88×1i 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 designed for the highest possible image quality; the polychromatic objective forms the optical base system.

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

Diffraction-limited correction is maintained from 365 nm to 1014 nm, allowing the UBVRI spectral range of modern CCD and CMOS sensors to be fully utilized.

System focal length

1000 mm

Focal ratio

f/5.6

Image scale

3.438'/mm or 0.291 mm/'

Image field diameter

Ø53.1 mm (3.0 °)

Polychromatic RMS spot radius vs. field

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

Maximum focal shift range

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

Anti-reflection coating

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

Number of lenses

6 (2×CaF₂)

Backfocus

120 mm

Connection on the telescope side

Dovetail ring S108a

Connection on the camera side

Thread M88×1i

Product information

APQ Polychromats

APQ 180/1440 Polychromat

APQ Reducer 180/1440