Shop Magazine
%SALE%
EN / $
✓ Europe's largest sport optics specialist
✓ 7,500+ items available from stock
✓ Personal advice & service
Get closer
Binoculars Spotting scopes Digiscoping Night vision Rangefinders Outdoor Tripods Microscopes % SALE %
Astronomy > Telescope accessories > Alignment accessories > Miscellaneous > Bobs Knobs > Bobs Knobs Springs for Newtonian 8”, 10”, and 12” Primary
Product no.: 55358

Springs for Newtonian 8”, 10”, and 12” Primary

$ 45.90 incl. VAT plus shipping costs
in stock
ready for shipping in 24 h + lead time
Express shipment possible for delivery tomorrow, 11.06.2025!
Product questions?
advice for Astronomy

Product description

Primary mirror springs as supplied by the factory can sag from the weight of the mirror cell. These stainless steel replacement springs are stronger and provide adequate support to maintain primary mirror collimation.

We recommend that the mirror locking screws remain in place for additional control.

The manufacturer Bob's Knobs supplies various collimation screws for Schmidt-Cassegrain, Ritchey-Chrétien and Newton telescopes.

The selection includes screws for primary and secondary mirrors for optics between 5" and 16". In addition, Bob's Knobs offers mounting screws for various mounts from Celestron (CGE, CGE Pro, NexStar), Losmandy (GM-8, G-11) and TeleVue (Gibraltar).

Please refer to the respective specifications and technical data to find the right screws for your model!

Specifications

Capacity

Number (piece)
3

Product safety

Manufacturer: Bob's Knobs, 6976 Kempton Rd., IN 47330 Centerville, US, www.bobsknobs.com
Responsible person: NIMAX GmbH, Otto-Lilienthal-Str. 9, 86899 Landsberg am Lech, DE, [email protected]
Product safety
Bobs Knobs Springs for Newtonian 8”, 10”, and 12” Primary
Bobs Knobs Springs for Newtonian 8”, 10”, and 12” Primary

Customer reviews

There are no customer reviews for this product yet.

Compose your own review

Do you have specific questions about your order or products? Please contact our customer service!

Add your review now

Customers who bought this product also bought...

Bobs Knobs Knobs for Meade Lightbridge and GSO Dobsonians Secondary Mirror
$ 52.00
Bobs Knobs Knobs for Meade Lightbridge and GSO Dobsonians Secondary Mirror
 Bobs Knobs SCT 8" (post-1980 Standard)
$ 45.90
Bobs Knobs SCT 8" (post-1980 Standard)
 Bobs Knobs Knobs for C8 f/10 Secondary with Metric Collimation Screw Threads
$ 68.00
Bobs Knobs Knobs for C8 f/10 Secondary with Metric Collimation Screw Threads
 Bobs Knobs Knobs for SkyWatcher Newtonian Secondary
$ 52.00
Bobs Knobs Knobs for SkyWatcher Newtonian Secondary
 Bobs Knobs Knobs for Newtonian 12” Primary
$ 79.00
Bobs Knobs Knobs for Newtonian 12” Primary
 noctutec Dark adaptation glasses for astronomers
$ 32.90
noctutec Dark adaptation glasses for astronomers