Now the company has developed an even better photographic accessory for this telescope and its sibling the Pronto refractor. It is threaded for standard 48-mm filters. The 2.5 -wide field shows round stars to the very corners of the image. Cook's original Kodak Pro 400 PPF negatives were scanned at a resolution of 3,048 dots per inch and blended with Picture Window before being enhanced with Adobe Photoshop.
North is up and east is to the left.
The lens flattens the telescope's field, yielding more uniform focus across the film plane. To test the new system I chose the large, diffuse nebulosity IC 2177 in the winter Milky Way, where the dense star field would be a challenge of the new lens's capabilities. Star images are perfectly round to the very corners of the field, and there is minimal vignetting. A high-magnification examination of the images reveals little, if any, secondary color even at the edge of the field. This accessory is a must-have for someone planning to use the Tele Vue 85 photographically.