Complex sentence: West installed telescopes and a camera obscura, to help students from the Bristol School of Artists, who used it to draw the Avon Gorge and Leigh Woods on the opposite side, many examples of these paintings can be seen in Bristol City Museum and Art Gallery.
Split into simpler sentences: West installed telescopes and a camera obscura, which were used by artists of the Bristol School to draw the Avon Gorge and Leigh Woods on the opposite side. Many examples of these paintings can be seen in Bristol City Museum and Art Gallery.