Altair 150EDF apochromatic doublet refractor

An all-rounder, combining pinpoint focus and natural colours with imaging capability

Size and scale With the dew shield and focuser extended, the 150EDF is 140cm in length and weighs around 10kg, but we found it to be quite manageable and we mounted it singlehandedly. Accessories like cameras or diagonals add length and weight and help to counterbalance the front-heavy scope. Dew shield The dew shield protects the objective lens from the unwanted effects of dew and stray light. It can be fixed in place with an Allen key (not supplied) and lengthens the scope by 22cm, making a difference to its size and balance. Tube rings The 150EDF is supplied with well-machined rings, a fitted Vixen-style dovetail bar on the bottom and a rounder-style bar on top. This acts as a carrying handle or an accessory-mounting rail with multiple fitting points.…

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The Astronomer's Yearbook (Digital) - 1 Issue, Astronomer's Yearbook 2021

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