Currency: EUR

f/3.9 Reducer for FRA400/5.6 and FRA500/5.6

Discount -5%


Askar f/3.9 Reducer for FRA400/5.6 and FRA500/5.6

Recommended price
319,00 €

Product description

The new Askar FRA400 F3.9 full-frame reducer reduces the effective focal length of the telescope by a factor of 0.7x. The original f/5.6 apo becomes an f/3.9 apo. Its exposure time is significantly shorter, it is reduced to about 50%. The field of view becomes considerably larger.

The FRA400Red was developed for use with the FRA400 and FRA500 flatfield refractors and offers good correction with these telescopes, even when full-frame size sensors are used. The working distance from the M48x0.75 thread to the camera sensor is 55 mm. The camera adapter is equipped with a 2" filter thread.

When used with the FRA500 telescope, the M86-to-M68 adapter (supplied with the FRA500equired telescope) is required. The FRA400 telescope does not need the adapter.

Product details


  • Suitable for full frame cameras
  • Thread: M68x1
  • Shortens the focal length from 400 millimeters to 280 millimeter
  • Shortens the focal length from 500 millimeters to 350 millimeters
  • 2 "filter thread

Shipping costs

15,90 €
European delivery 2-5 days.
PostNord Parcel locker
5,90 €
PostNord Home deliver
19,00 €
Environmentally friendly delivery to your door at the agreed time. Trackable deliveries in real time even in the evenings in the biggest cities. Change your delivery as required.
UPS Standard
14,90 €
Delivery to Europe in 2 to 5 days.
5,90 €
12,90 €















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