HOYA 49 ø r (25A) VINTAGE JAPAN LENS FILTER IN ORIGINAL HOYA CLEAR CASE.ON THE BACK OF THE CASE IS THE FACTOR GUIDE. (PICTURED)HOPEFULLY YOU'LL KNOW IF THIS IS COMPATIBLE WITH YOUR CAMERA.GOOD CONDITION.I FOUND THIS INFORMATION ON A WEBSITE: Darkens blue creating dramatic contrast between sky and clouds.Creates greater contrast between flowers and foliage.Used in scientific photography.Excellent for copying blueprints.Not recommended for skin tones. Brand Name: HoyaDevice Type: FilterForm Factor: RoundItem Display Diameter: 49 millimetersSpecific Uses For Product: Camera, Black & white film Especially effective for increasing contrast. Ideal for dramatic cloud effects in landscapes. Can also be applied creatively in color and infrared photography. THE FILTER SCREWS ON TO MOUNT.PLEASE SEE PICTURES.SOLD AS IS.U.S. SHIPPING ONLY. PAYPAL ONLY PLEASE.THANKS FOR LOOKING!