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Eye Relief
Also effective on smaller economy telescopes that cannot benefit from expensive narrow-band nebula filters due to the huge light loss involved
) on your William Optics refractor with our Asiair Mount
including DSLR cameras
Explore Scientific Field Flattener f/5 to f/7 CEM Eye ReliefThe explore scientific field flattener provides correction to Explore Scientific refractors F 5 to F 7 for a flat field and sharp, pinpoint stars in your images. On the telescope side, the flattener is a push fit 2" that is threaded to accept all standard 2" filters, such as light pollution narrowband filters. This fully multi coated flattener has a clear aperture of 38mm. The image circle at the standard 55mm backfocus distance is 42mm, ensuring full
