William Optics SpaceCat 51 WIFD - 51 mm f/4.9 Flatfield Refractor for Astrophotography

William Optics SpaceCat 51 WIFD Travel Apochromat for Astrophotography and Nature Photography

This apochromatic refractor is intended for all astrophotographers and nature photographers who are searching for a transportable and tack-sharp telephoto lens. Due to the 4-element Petzval design, a fully corrected image field of 48 mm diameter without chromatic aberration is achieved. Thus even full-frame cameras can be used. Focusing works internally, as with many telephoto lenses, but via knobs with an additional fine focus knob (dual speed), as with telescopes. However, with 298 mm length, the apo ist not larger than a normal telephoto lens. But it can do more.

The application areas of the SpaceCat 51 apo:

Astrophotography: With 250 mm focal length and fast f/4.9, short exposure times are possible. The working distance of 55 mm allows using all popular astro cameras. mirrorless system cameras and DSLR/SLR cameras. The fine focusing allows a precise focus, the rotation the selection of the suitable image section. The supplied Bahtinov mask helps with focusing and is integrated in the objective cap.

Countryside photography and animal photography: The SpaceCat 51 is also perfect for, for example photographing animals. Internal focusing allows you to focus without shifting the weight, and therefore also without changing the position. The image field is thus not altered. The image quality will impress you.

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