Optolong CLS EOS-C Clip on Filter

Optolong CLS EOS-C Clip on FilterOptolong CLS EOS C Clip on Filter OPTOLONG CLS Filter Clip Built in Filter for EOS C Camera Planetary CCD Cameras & DSLR This filter is made for photography of deep sky targets in urban environments. The filter works by blocking the wavelengths or mercury and sodium vapour used in urban lighting while letting the visible and the critical OIII, H Alpha and H Beta bands through, allowing great versatility in terms of potential objects to image. Use it

comfortable visual field

stored in the TF card (not included)

BaK-4 prisms increase contrast and resolution for sharper more detailed images

low-dark-current cameras

Exposure times don't necessarily increase

3 group(A B C group)

There is a stop button on the side of the pager

Compatibility: Male T-threads on the focuser collar allow for secure attachment of guide cameras equipped with female T-threads

Digital Rebel t1i

Product Type: Angled Spotting Scopes

While a 30-second exposure without a filter might saturate the sky background

As a manufacturer