Askar SQA85 85mm f/4.8 Quintuplet Petzval Astrograph

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Askar SQA85 85mm f/4.8 Quintuplet Petzval Astrograph

£2,395.00✓ 2 year warranty

Product description
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:	1x in stock shipped 1-2 working days

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About this product

Model: askar_sqa85
Part Number: SQA85

Askar SQA85 85mm f/4.8 Petzval Astrograph

The new Askar SQA85 is a high-quality quintuplet air-spaced Petzval astrograph with two pieces of SD glass for superior star point performance.

The central star point has an RMS radius of less than 1.6 um, and the star point at the corner is less than 2.5 um. It also has excellent full-field illumination and MTF data.

Multiple Adapters

The rear of the SQA85 is equipped with various adapters, all of which are toothed and ribbed, making it easy to rotate them manually without slipping.

The adapter thread sizes are M68, M54, and M48.

Specifications

Aperture size	85mm
Focal length	408mm
Focal ratio	f/4.8
Objective lens	Quintuplet Petzval APO（including two pieces of SD glass)
Format specifications	Full-frame
Total length	Manual focus
Filter Diameter	M67
Total length	403mm(when dew shield retracted) 439mm(when dew shield extended)
OTA weight	3.64kg
Total weight (including handle & dovetail plate)	4.62kg
Rear-end thread type	M48/M54/M68 adapters
Rear-end connection distance	Supports 40-70mm range (Recommended connection length is 55mm)
Standard package items	a SQA85 OTA in an Oxford cloth case