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High-quality quintuplet air-spaced ED glass Petzval Astrograph.
SPECIFICATIONS
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Aperture size |
70mm |
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Focal length |
336mm |
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Focal ratio |
f/4.8 |
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Objective lens |
Quintuplet petzval APO（including two pieces of ED glass） |
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Total length |
332mm(when the dew shield is contracted) |
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Format specifications |
full frame（44mm） |
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OTA weight |
2.68kg |
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Gross weight（including tube ring and dovetail plate） |
3.5kg |
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Rear-end thread type |
M42/M48(with M48×0.75 filter thread)/M54 adapters |
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Rear-end connection distance |
Support 37-68mm range (Recommended connection length is 55mm) |
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Standard package items |
a SQA70 OTA, an Oxford cloth case |
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