Fisheye Lenses for Astrophotography - TTArtisan vs. Sigma vs. Canon vs. Opteka - SHOOTOUT

All test results from this video are up on: . This video is a shootout review of the following fisheye lenses: Opteka f/3.0 HD, TTArtisan 11mm f/2.8, Sigma 15mm f/2.8 Diagonal Fisheye, Sigma 8mm f/2.8 Circular Fisheye, Canon 8-15mm f/4L USM ============================= Supporting this channel: ============================= ◦ I'm on Patreon: ◦ You can use my affiliate link when shopping for astrophotography gear at OPT: ◦ You can use my referral code when buying subscriptions to Astrobin: New accounts- Existing accounts- Use Promo Code: NEBULAPHOTOS ◦ One-time donations: ============================= Lens links: ============================= Opteka f/3.0 HD - TTArtisan 11mm f/2.8 - Sigma 15mm f/2.8 Di