These parfocal rings are a game-changer for astrophotography using different eyepieces .THEY keep the focus consistent and allow for quicker and easier swapping of eyepieces. The rings are durable and fit well on my eyepieces. The only downside is that they are a bit pricey for what they are but the convenience and quality make up for it. Overall, if you are really into astro-photography, these parfocal rings are a worthy investment..
Canon Nikon Sony Panasonic FujiFilm Olympus Pentax DSLR Camera Bag, Evecase Large Vintage Canvas Messenger SLR Shoulder Strap Case - Gray
45 Review
Canvas Camera Case Bag With Shoulder Strap For DSLR/SLR Cameras - Black, Medium Size By Evecase
30 Review
Protect Your Earbuds On-The-Go With Small And Portable EVA Case - Perfect For Airpods, USB Drives, Cables And More!
34 Review
Protective Silicone Cover For Samsung Galaxy Buds & Buds+, Shock Resistant With Carabiner And Fast Wireless Charging Compatibility - Fironst Case For Galaxy Earbuds 2020 (Black)
52 Review