UV-Pass filters – a comparison

Updated 29/8/14 to include Baader U 2012.

The current ‘gold-standard’ reference UV-pass filter is the Baader U filter. This filter is essentially a thin UG11 filter with multiple layers of dielectric coating applied to it. It has sufficient IR-block to prevent any IR-contamination of the UV image.

While it is thought to be the best UV-imaging filter out there, it is certainly not a cheap filter, and the price seems to go up with each passing year, making it even more out of reach to many who may be interested in UV-imaging. Hence it is worth considering if there are any more affordable options out there. I have shot the same flower with the different filter stacks, so the resulting UV image can be compared. Continue reading UV-Pass filters Рa comparison

Sony NEX-3 Infrared

I have been an early follower of the Sony E-mount system, having bought and used the NEX-3, NEX-5, NEX-5N, NEX-7, NEX-6 and now the A7R and A6000 – I have noticed a gradual improvement with each new generation of E-mount camera in terms of usability and functionality.

The Sony NEX-3 was the first camera I modded to full-spectrum by removing the internal cut filter (ICF). It proved useful for UV and infrared imaging, as the native lenses retained the ability to infinity focus. Continue reading Sony NEX-3 Infrared