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Hi Guys I've read about a special Hoya filter, intended to be used for portrait or general landscape (especially in fall) photography: The "Hoya RA54 Red Enhancer (Intensifier)" he original article that gave me that idea can be found here: http://www.lonelyspeck.com/hoya-intensifier-review-an-affordable-light-pollution-filter-for-astrophotography/ Now, I did some own comparison, to get an idea how well it works. First I compared the filter's properties with the emission line of a sodium light source; these nasty orange light you will anywhere in cities. Usually you can be miles away and still have a significant amount of orange glow in your picture. The transmission properties of that particular filter seems promising. At 590nm wavelength (the emission maximum of a sodium lo pressure light source), we only have roughly 40% transmission while other wavelengths are only slightly affected. But what does it mean...? Well, that enables you to selectively cancel out a certain colour, in that case the annoying light of that sodium light source. Since it still has 40% transmission, you will not remove all of it, but for 30-60 € (depending of the diameter you need) it improves you pictures quite a lot. Take a look at these pictures, showing a 250000-people city in central Europe (a heavy example of light pollution indeed): All pictures were taken with a RX10, white balance set to cloudy (just to avoid the camera having any influence to the result), 8 seconds/ f2.8 I know, these are quite challenging conditions, with the city directly in front of you. If you use it in more typical scenarios, that filter should really do a good job removing the vast majority of orange-ish light form your night shoot.

Hey guys! I did some filming in a nightclub the other day, for soem DJs. Reviewing the footage, I noticed these faint black lines in most of the clips. I presumed it was due to the different frequencies of the lights. However, the lines don't move up or down; they are just stationary. I'd expect flicker, or rolling lines - but these do neither. I have encountered this problem before, which I isolated to being to do with fresnel lights. At the time, I changed shutterspeed, FPS and even switched from PAL to NTS, but this didn't get rid of the lines fully. Can anyone explain this, or has anyone had the same issue before? I was filming on a Sony A6300 with a 50mm lens, PAL on 100P 50M, ISO 800, a shutter at 1/200 and F1.8. Thanks!