Askar FRA400C The Askar FRA400C is a 72 mm, 400 mm f/5.6 quintuplet astrograph for astrophotography, everyday photography and visual observing. Its two-ED optical design covers a 44 mm full-frame image circle.
Manufacturer model: Askar FRA400C · Specifications checked against manufacturer data on 2026-11-04
The Askar FRA400C is a 72 mm, 400 mm f/5.6 quintuplet astrograph for astrophotography, everyday photography and visual observing. Its two-ED optical design covers a 44 mm full-frame image circle.
Aperture and camera connection
A 17-blade diaphragm adjusts from f/5.6 to f/22, and minimum focus is 5 m. The front accepts M82 filters. At the rear, M72/M54/M48 photographic adapters include a built-in M48×0.75 filter thread. The native camera connection range is 50–60 mm, with 55 mm recommended.
Focusing and mounting
The single-speed helical focuser locks and provides adjustable damping. MXL teeth allow an optional motor-focuser belt installation. The tube can rotate for framing. The mounting ring provides accessory holes and two finder bases, with a multifunction handle and a 290 mm Vixen-style dovetail. Tripod attachment provisions include M6, 1/4-inch and 3/8-inch threads.
Visual use and dimensions
The manufacturer includes 1.25-inch and 2-inch eyepiece adapters. OTA weight is 2.68 kg, or 3.18 kg with handle and dovetail. The manual gives a 370 mm overall length; the product page additionally lists 420 mm with inconsistent hood wording, so the configuration is not inferred.
The manufacturer length row gives 370 mm and 420 mm with inconsistent dew-shield wording. Both figures are retained as published without assigning a corrected configuration. Native camera connection range is 50–60 mm, with 55 mm recommended. Product table and manual operating text say two ED elements; a manual specification line says SD. The product-table ED designation is used.
Additional specifications
Aperture blades
17 pieces
Aperture range
f/5.6-f/22
Minimum focus distance
5m
Focusing mode
Manual focus
Front filter thread
M82
Weight with handle and dovetail
3.18kg
Tripod mounting threads
M6; 1/4-inch; 3/8-inch
86029
Datasheet
Opening
72mm
Afstand cameraaansluiting
Support 50-60mm range (Recommended connection length is 55mm)
Dauwkap
Retractable
Zwaluwstaart
290 mm Vixen-style
Veldcorrectie
Integrated Petzval-like system
Zoekerbasissen
2
Brandpuntsafstand
400mm
Openingsverhouding
f/5.6
Focuser
Single-speed helical; lockable with adjustable damping and MXL belt teeth
Beeldformaat
44mm
Lengteconfiguraties
370 mm and 420 mm published; manufacturer dew-shield configuration wording is inconsistent
Standaardpakket fabrikant
FRA400C OTA with four-piece photographic adapter; 1.25-inch and 2-inch eyepiece adapters; rings; handle; dovetail; documentation
Model
FRA400C
Optisch ontwerp
Quintuplet dual ED air-spaced APO
Gewicht optische tubus
2.68kg
Achteradapter
M72/M54/M48(with M48×0.75 filter thread)
Rotator
Whole-OTA orientation adjustment
Dit product gebruikt? Deel je ervaring met andere astronomen.
Commentaar (0)
Geen klantenbeoordelingen op het moment.
Uw beoordelingswaardering kan niet worden verzonden
Rapporteer reactie
Bent u zeker dat u deze opmerking wil rapporteren?
Melding verzonden
Uw opmerking is ingediend en zal door een beheerder worden behandeld.
Uw opmerking kan niet worden verzonden
Schrijf uw recensie
Beoordeling verstuurd
Uw beoordeling is toegevoegd en wordt beschikbaar zodra deze is goedgekeurd.
Askar FRA400C The Askar FRA400C is a 72 mm, 400 mm f/5.6 quintuplet astrograph for astrophotography, everyday photography and visual observing. Its two-ED optical design covers a 44 mm full-frame image circle.
Manufacturer model: Askar FRA400C · Specifications checked against manufacturer data on 2026-11-04
