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APQ Focal Reducer Corrector for APQ 100/640

Special six-lens aspherical design (2×CaF₂) for APQ 100/640 Polychromat
500 mm system focal length
f/5 focal ratio
Ø44.8 mm (5 °) flattened image field diameter without vignetting
≤ 3 µm (365 nm – 1014 nm) / Ø44.8 mm (5 °) polychromatic RMS spot radius vs. field
ultra-broadband AR coating
80 mm backfocus
Lens cell made of high-quality aluminum alloy
Dovetail ring S88a on the telescope side
Thread M68×1i on the camera side

Price

on request

Delivery time

on request

Inquiry

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Description
Specification
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The APQ 100/640 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 100/640 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

500 mm

Focal ratio

f/5

Image scale

6.875'/mm or 0.145 mm/'

Image field diameter

Ø44.8 mm (5 °)

Polychromatic RMS spot radius vs. field

≤ 3 µm (365 nm – 1014 nm) / Ø44.8 mm (5 °)
(theoretical)

Maximum focal shift range

±0.003 % (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

80 mm

Connection on the telescope side

Dovetail ring S88a

Connection on the camera side

Thread M68×1i

Product information

APQ Polychromats

APQ 100/640 Polychromat

APQ Reducer 100/640