42mm Binocular/Monocular Objective Lens Caps Internal Diameter 51.8-53.3mm Rubber Cover Set Black, (51.8-53.3LC)

Perfect fit for my Swarovski binocular objectives. These fit snugly on both objectives compared to the oems, which had stretched and constantly flopped off. I can recommend these. They seem to be good quality and stay on until you pull them off.

If you're like me, you might be wondering... Do I get the 50.5-51.8mm or the 51.8-53.3mm. Well after trying both I can say definitely get the 51.8-53.3mm. Because the Prostaff P3/P7 has a thick rubber armor the smaller of the two was too tight, you almost have to force it a little around the lens. With the 51.8-53.3 you just push it in and it fits perfectly snug, not loose or too tight. The quality of these is fairly good. I was worried they'll be too much flex on the cap but it has a nice balance between flex and stiffness. I would prefer it to be a slightly stiffer/harder but it's still good the way it is. The edges are cut perfectly smooth. One noticeable thing I like is when the cap is off, it goes straight down and out of the way of the viewing lens as shown in the photo. Definitely recommend.

Fits perfectly.

These lens caps fit my Nikon Monarch 5 binoculars well. Rather than tuck inside the lens opening like the OEM Nikon caps, they pop over the end of the lens. By paying close attention to the dimensions - as the seller clearly desccribed, they are snug and stay in place. The ring that slides over the barrel to hold the caps isn't especially thick and sturdy feeling, so I wonder about long term durability, but hey, for the price, they are fine.

Lens covers fit my binoculars perfectly. They seem sturdier than the ones that came with the binocs and will likely last a lot longer.

these fit perfectly. thank you!

These are a good replacement for the flimsy covers that came with the Nikon Action EX 10x50 binoculars. 61.5-64 size are a good fit for those. I also got the 60.9-63.2 size which fit the Pentax S-Series WP 10x50 binoculars.

I just purchased the Nikon Prostaff P7 8x30 binoculars, which are great. However, as others have remarked, the included plastic Nikon lens caps leave a lot to be desired and are loosely fitting. The outside of the objective end of these binoculars measures 47.75 mm in diameter using calipers. Based on this, I ordered the 46.5-48mm sized lens cap. These fit perfectly and have a nice snug friction fit (but not too snug to quickly pull off for viewing using the tab). The attachment ring slides tightly over the lens barrel and securely holds the caps when they are not covering the objective lenses. These appear to be made of a high-quality rubber and should do an outstanding job of protecting the objectives. Too bad they don't come with the binoculars.