Accessory
Baader Planetarium TZ-4S Telecentric System T-2 for SunDancer II
Baader Planetarium · TZ-4S Telecentric System T-2 for SunDancer II · Barlow lens
Key specifications
| Accessory type | Barlow |
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| Weight | 0.25 kg |
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| Back focus | 97 mm |
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| Factor | 4 × |
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All specifications
| Interface | 1¼"/2" nosepiece (telescope side), T-2 (camera side) |
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| Compatible with | SunDancer II (with its blocking filter moved over) and SolarSpectrum H-alpha filters up to 36 mm; general use as a 4x Barlow |
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About
An achromatic 4x telecentric system delivering a parallel beam over a 36 mm image circle for H-alpha and CaK etalons, also usable as a Barlow; dual 1¼"/2" nosepiece with 1¼" filter thread, T-2 on the camera side, and a ½" cell for the SunDancer II's 2 nm blocking filter. Gives f/30 on f/7.5 telescopes.