BBC Sky at Night Magazine
3 Teleskop Service Bahtinov focusing masks
Price from £18 • Supplier Widescreen Centre Tel 01353 776199 • www.widescreen-centre.co.uk
Reach the best focus possible with the help of these Bahtinov masks. The slits create exaggerated star spikes, the positions of which will show if your optics are even slightly out of focus. Available in a range of sizes.