Bob's Knobs Adjusting screws for Celestron SCT 8″ (post-1980 Standard)

Bob's Knobs for Celestron SCT 8 inch (post-1980 Standard): Collimate your Schmidt-Cassegrain without tools

This set replaces the small collimation screws on the secondary mirror of the Celestron 8-inch SCT (post-1980 Standard). In a Schmidt-Cassegrain, the secondary mirror is located in the center of the corrector plate: a screwdriver that slips could directly hit the glass. With thumb screws, you can collimate by feel, safely and with extreme precision.

Bob's Knobs replaces the original screws with stainless steel thumb screws with knurled grips. This allows you to collimate entirely by hand: no screwdriver over the optics, no rolling away Allen keys in the dark, and full control even with gloves on.

Features

• Three stainless steel thumb screws with knurled grip
• Aligning without tools, even in the dark or with gloves
• No risk of slipping with a screwdriver over the optics
• Corrosion resistant and mountable without permanent modification

Compatibility

Suitable for Celestron SCT 8 inch from the year of manufacture 1980 with standard (imperial) thread. Check the year of manufacture and thread type of your telescope: Celestron has used both standard and metric threads over the years.

Specifications

You can find more accessories for this brand at the Bob’s Knobs brand page.