Hoya 52mm HMC Red 25A Screw-in Filter

I use this filter on a monochrome digital camera and it makes skies more dramatic by darkening the blue regions without affecting the white clouds. Here are some photos I took using it on my Pentax K3III Monochrome at Trona Pinnacles near Death Valley

Gift for my daughter the photographer and photography teacher. She said it was perfect.

Improves contrast in my B & W shots, but not severely so. Makes for interesting effects when shooting color. Currently using on a Pentax K-r and zoom lenses, 18-55mm and 50-200mm. Well made; good threads and glass not loose in frame.

the filter works great! good contrast, blacks are really black when you shoot in black and white. It does it job well! great buy.....

Super well manufactured, glass is immaculately smooth and red is uniform the whole way through - but be advised this won't simply add red to your shot, when you check your histogram, you'll see nothing but red.

I used this for B&W photography. Works as expected.

The filter is alright, but it seems to mess with my cameras' (plural) ability to focus. My sony a5000, my canon T6I, and my Olympus om-1 all had issues with drastic change in f-stop, which is expected with such a dark filter, but what seemed to be a bit worse was my inability to properly focus through the filter. That aside, it is also exceptionally difficult to clean. The only benefit I see is how greatly it pulls those red hues in the shadows, and washes away those blues. Takes quite a bit of getting used to. If shooting in manual, anticipate a one to two step lower exposure with filter on. Almost acts like a 1 step nd filter. Over all, not bad if you know what you're doing, but manual and auto focus may be a little tricky. Attached is a picture I took with in black and white (obviously) with my T6i at an f-stop of 1.8, shutter speed of 1/160, and in ISO of 400 with a 50mm lens. Not too shabby after a little bit of fiddling around with the filter, but I should have shelled out a couple of extra dollars for the Tifften equivalent.

Excellent filter for darkening the skies when shooting (or converting) your photographs to black & white. You could just adjust your settings to approximate this filter in PS, but there is something to be said for doing it the traditional way.

Il s'agit de filtre Hoya donc pas de surprise, excellente qualité, très peu d'impact sur la qualité de l'image, à utiliser lors de prise de photo en noir et blanc, bref recommandé très fortement.

I use Yellow filters on my lenses to reduce the blue sensitivity of black and White film, plus it helps to slightly darken blue sky. Hoya filters are well made and have a good anti-flare multicoating. I own many Hoya filters and will happily but more when required.

Dieser Rotfilter hat mich wirklch überrascht. Multischichtvergütet, mit hervorragender Verarbeitung, dabei leicht und mit sehr gleichmäßiger Filterwirkung. Diser Filter ist rund das Doppelte wert! Eine echte Empfehlung für alle, die keinen Kaiser oder Kaesemann-Filter im Auge haben. Würde ich jederzeit wieder kaufen - hab ich auch, genauer gesagt, in einem anderen Format, von dem ich hoffe, das dieser genauso gut ist. Hat Filtergewinde oben zur Montage weiterer Filter.

This filter is a permanent addition to my camera. I just leave it on and it works for all black & white photography styles.

For B/W photography this is a must. Great product from a trusted brand