APQ News

APQ 110/550 Fluorite Wide Field Polychromat
The first APQ Wide Field Polychromat starts with the following specification:
110mm aperture
550mm focal length
f/5 focal ratio
Ten lens aspherical design
3 lenses from CaF₂
Integrated special focal reducer corrector
Rectractable and lockable dew cap
Feather Touch Focuser FTF3545
The previously announced design variant with a 10° (Ø96.7mm) image field requires a focuser with a larger free diameter.
Ø67.4mm non-vignetted image field
UBVRI Fluorite Wide Field Polychromat
Polychromatic RMS spot radius vs. field ≤ 1.0µm in the spectral range from 365nm to 1014nm over the entire field diameter of Ø67.4mm (7°)
Polychromatic Strehl ratio ≥ 0.95 (365nm – 1014nm)
Compact travel-ready dimensions (427mm transport length)
Stunning imaging performance for astronomy and nature observation that shows where to go
APQ 110/550 Fluorite Wide Field Polychromat

APQ 100/640 Fluorite Quadruplet Polychromat
Completion of the series of Fluorite Quadruplet Polychromats with the APQ 100/640:
100mm aperture
640mm focal length
f/6.4 focal ratio
Polychromatic Strehl ratio ≥ 0.95 (365nm – 1014nm)
APQ Field Corrector (system focal length 640mm): ≤ 4.2µm (365nm – 1014nm) / flattened image field diameter without vignetting Ø45.5mm (4°) polychromatic RMS spot radius vs. field
APQ 0.78x Focal Reducer Corrector (system focal length 500mm): ≤ 3.25µm (365nm – 1014nm) / flattened image field diameter without vignetting Ø44.8mm (5°) polychromatic RMS spot radius vs. field
Airplane cabin compatible (487mm transport length)
APQ 100/640 Fluorite Quadruplet Polychromat

APQ website further completed
Completion of the product section of the website with a detailed description of the features and specification of the technical data:
APQ Fluorite Quadruplet Polychromats (additionally with recommended accessories, applications and downloads)
APQ Polychromatic Focal Lens Systems
APQ Accessories
A separate flyer with the most important information is available as a PDF for each APQ Fluorite Quadruplet Polychromat.
APQ Products

APQ 110/550 Wide Field Polychromat – Advance notice
The APQ 110/550, the first Wide Field Polychromat, is ultimately suitable for astronomical and nature photography with modern CMOS cameras with small pixels due to its huge image field. Visual observers benefit from the high polychromatic Strehl ratio and its compact, travel-ready dimensions. The APQ 110/550 has the following (preliminary) features:
110mm aperture
550mm focal length
f/5 focal ratio
10° (Ø96.7mm) image field diameter
Polychromatic UBVRI correction from 365nm to 1014nm throughout the field of 10°
Polychromatic Strehl ratio ≥ 0.95 (365nm – 1014nm)
RMS spot radius ≤ 2µm for all wavelengths from 365nm to 1014nm in the entire field of 10°
Airplane cabin compatible
APQ 110/550 Fluorite Wide Field Polychromat

APQ Accessories
Completion of the mechanical design of our own mechanical telescope assessories:
Dovetail Plates
Mounting Rings
Carrying Handles
Steering Wheels
Dew Caps
Changer
Change Rings
Extension Tubes
Adapters
Dustcaps
APQ Accessories

APQ Polychromatic Focal Lens Systems
Specially designed polychromatic field correctors (flattener) and polychromatic focal reducer correctors (reducer) for each individual APQ Polychromat:
APQ 130/1000 Fluorite Quadruplet Polychromat
APQ 150/1200 Fluorite Quadruplet Polychromat (already known)
APQ 180/1440 Fluorite Quadruplet Polychromat
APQ 200/1600 Fluorite Quadruplet Polychromat
APQ Polychromatic Focal Lens Systems

APQ Fluorite Quadruplet Polychromats – The polychromatic APQ family with apertures from 100mm to 300mm is almost complete
Completion of the optical and mechanical design for these Polychromats:
APQ 130/1000 Fluorite Quadruplet Polychromat
APQ 150/1200 Fluorite Quadruplet Polychromat (already known)
APQ 180/1440 Fluorite Quadruplet Polychromat
APQ 200/1600 Fluorite Quadruplet Polychromat
APQ Fluorite Quadruplet Polychromats

APQ 150/1200 Fluorite Quadruplet Polychromat
A Polychromat 150/1200 was tested with an interferometer at 546.1nm with a Strehl of 0.976. According to the optical design, the maximum Strehl for this wavelength can theoretically be 0.986. Due to a design revision we were able to achieve a weight reduction of approx. 3kg. The OTA 150/1200 will therefore not weigh 15.8kg as originally stated, but less than 13kg!
APQ 150/1200 Fluorite Quadruplet Polychromat

APQ Astronomical optics from Jena
APQ JENA brings astronomical optics and instrument technology back to life after 25 years in Jena and announces a new line of Fluorite Quadruplet Polychromatic Refractors. A Fluorite Quadruplet Polychromat from APQ JENA is the first astronomical objective to be able to use the full UBVRI spectral range (365nm – 1014nm) of modern electronic sensors (CCD, CMOS).
APQ JENA