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APQ Focal Reducer Corrector for APQ 100/640

Special six lens aspherical design (2xCaF₂) for APQ 100/640 Polychromat
500mm system focal length
f/5 focal ratio
Ø44.8mm (5°) flattened image field diameter without vignetting
≤ 3µm (365nm – 1014nm) / Ø44.8mm (5°) polychromatic RMS spot radius vs. field
Ultra broad band AR coating
80mm backfocus
Lens cell made of high quality aluminum alloy
Dovetail ring S88a on the telescope side
Thread M68x1i 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; 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 100/640 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

500mm

Focal ratio

f/5

Image scale

6.875'/mm or 0.145mm/'

Image field diameter

Ø44.8mm (5°)

Polychromatic RMS spot radius vs. field

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

Maximum focal shift range

±0.003% (365nm – 1014nm)
(theoretical)

Anti-reflection coating

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

Number of lenses

6 (2xCaF₂)

Backfocus

80mm

Connection on the telescope side

Dovetail ring S88a

Connection on the camera side

Thread M68x1i

Product information

APQ Polychromats

APQ 100/640 Polychromat

APQ Reducer 100/640