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Do you own or want to buy a refractor, especially apochromatic, and want to use it as a spotting scope for breathtaking views of nature? Our DX45 PRO OnAxisLock 31,8mm erect image prism is the best choice for those who want to maintain the high quality optics that the refractor usually offer. Unlike ordinary erect image prisms, this model uses high quality 45° prism and mechanical construction to enable you to use your telescope with utmost satisfaction.
The DX45 PRO OnAxisLock 31,8mm erect image prism will fit into all the 50.8mm diameter eyepiece (for terrestrial use it replaces the 90° diagonal that are usually used for the observation of the sky) and corrects the image orientation (normally inverted in refractors).