TakMan
20-03-2018, 05:49 PM
AMP TS Universal 2.5" flattener for f/5 up to f/9 refractors.
Its NEW. Paid $490 AUD you can have for $300.
https://www.teleskop-express.de/shop/product_info.php/language/en/info/p2646_TS-PHOTOLINE-Full-Frame-APO-Corrector---Flattener-for-astrophotography.html
2" or T2 flatteners are to small for big CCD cameras. This new 2.5" flattener has a open aperture of 62mm. It allows you to use big CCD cameras (for example 24x36 mm) at fast f/5 refractors. The distance between flattener and CCD sensor is 91.5mm - so you can use accessories like filter-wheels or off-axis-guider without problems.
This is only a flattener, there is no reduction of the focal-length. You can use the flattener at f/5 up to f/9 refractors.
Its NEW. Paid $490 AUD you can have for $300.
https://www.teleskop-express.de/shop/product_info.php/language/en/info/p2646_TS-PHOTOLINE-Full-Frame-APO-Corrector---Flattener-for-astrophotography.html
2" or T2 flatteners are to small for big CCD cameras. This new 2.5" flattener has a open aperture of 62mm. It allows you to use big CCD cameras (for example 24x36 mm) at fast f/5 refractors. The distance between flattener and CCD sensor is 91.5mm - so you can use accessories like filter-wheels or off-axis-guider without problems.
This is only a flattener, there is no reduction of the focal-length. You can use the flattener at f/5 up to f/9 refractors.