Build Your Own Spectrometer

Not exactly a photography related build, or at least not directly, but if you want to build your own LED lighting and you don’t happen to have a lab with a CRI testing facilities at your disposal, a spectrometer is a useful thing to have around. Whenever you want to check out those bargain LEDs you bought before you commit to building them into a light, stick them in front of this and look at …

LEDs: The Colour of Light

In my previous post I was trying to order my thoughts on how much power I needed for the LED lights I’m about to build. This post is going to look at the quality of that light. For LED lights this is mostly quoted as the CRI, or colour rendering index. This is effectively a measure of colour accuracy and is measured on a scale from 0 to 100. To get a score of 100, …

LEDs: The Power of Light

I’m about to start work on a slight overhaul of my lighting equipment, firstly because I hardly have any continuous lighting at the moment and secondly because my studio flashes are a bit big and unwieldy for lighting small subjects. I do have a bunch of portable shoe-mount strobes, which are quite versatile, especially when they’re used with the flexible strobe trigger I built a while ago, but I’m feeling the need for some revamped …

DIY Film and Slide Digitising

As the lockdown continues in the UK (amongst other places) and it’s impossible to get out and about with a camera, it struck me that now would be a good time to do some digitising of the mountain of old slides and negatives that are sitting in boxes in the attic and cupboards. In the past I’ve used a 35mm film scanner to kind of get started on the process, but the results were pretty …

Make your own Lens Coat

On rare occasions I manage to find enough free time to get out and attempt to do some wildlife photography. When this happens I browse through my less than extensive collection of telephoto lenses and dig out my lens of choice – a Sigma 100-300mm f4 HSM. It’s a pretty decent bit of kit for someone on a relatively limited budget, as unlike a lot of cheaper tele zooms it’s actually sharp at the 300mm …