

Indeed, 170PHQ and 80PHQ are similar in many aspects partially because they are both the newly-developed refractive astrographs from the same family. However even if they all have excellent mechanical design and sophisticated optical system, there are noticeable differences between these two.

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ASKAR 80PHQ + ASI 6200,Filter Optolong 3nm
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Focal length:600mm
Focal ratio:f/7.5
Objective lens:Quadruplet air-spaced APO (including two ED glass)
Image circle:44mm
Maximum accessory connection (with the focuser fully retreated):
1. Imaging mode:
115mm(from the base of M48×0.75 male thread)
135mm(from the base of M54×0.75 male thread)
155mm(from the base of M68×1male thread)
168.5mm(from the base of M76×1 male thread)
2. Observing mode:
148mm(from the end of 2" eyepiece holder)
Total length:448mm(including 1.25" eyepiece holder as dew shield contracted)
480mm(including the 4-piece adapter as dew shield contracted)
540mm(including 1.25" eyepiece holder as dew shield fully stretched)
570mm(including the 4-piece adapter as dew shield fully stretched)
Net weight:3.9kg
Gross weight:4.7kg
Rear-end thread type:M76×1-M68×1
M68×1-M54×0.75
M54×0.75-M54×0.75
M54×0.75-M48×0.75(M48×0.75 filter thread inside)
Standard package items:an 80PHQ OTA,a pair of tube rings, a handle, an Askar 300mm Vixen dovetail plate, a set of 4-piece photographic adapters, a manual


