Sunday 27 December 2009

How Keith Robins Photography photographs WOW factor drips of water!
Taking photos of drips takes time and patience, plus a little bit of know-how. For instance, try lighting whatever is being reflected in the water and not the water. In fact keeping the water in the dark is probably one of the best tips I can give you.
Try firing a hotshoe flash across the liquid's surface and lighting up something as simple as a reddish coloured festive dinner mat, a photograph from an old TV Times, or a pale yellow toughened glass cutting board, which are the items I've used in these three examples.
This is a technique I learnt underground during my caving days. (Goodness me, that's nearly 30 years ago!) Keeping the water dark always returned better photos than when the flash was pointing directly at a dark muddy pool and backlighting came out far better for moving water shots. Ripples also showed up better with backlighting, or when reflecting a cave wall or a caver is beyond and carefully lit so there is something tangible to show up as a reflection.
Camera settings of 1/200th or slower takes care of the flash side of things while an aperture is chosen to go with the flash power setting.
By reducing the power to 1/16th the duration of your average hotshoe flash is reduced to around 1/5,000th, which is plenty short enough to capture the fastest of drips. Surprisingly, the aperture is still up around the f5.6 to f11 mark, even at 1/16th power.
These ultra-fast flash durations, requiring reasonably wide apertures, dictate narrower depth of field so focusing has to be spot on.
I set the camera on manual focus and zoomed in on the markings of a steel ruler which was right under the drip, then pulled the zoom back and framed up.
A tiny pin hole in the base of the plastic bottle is necessary to allow a drip at around a two second interval, just about slow enough for a battery powered hotshoe flash on reduced power to recycle in time for the next drip. It's easy to get carried away and take hundreds of photographs once you've started capturing good shots
The idea is to count the drips out loud and nod your hand up and down in time. In your hand is the shutter release for your camera and your thumb is also keeping time with the count, but only actually pressing the button every other drip, (flash tubes can overheat with fast repeated use). Keep an eye on the camera preview screen and adjust your count very slightly to capture drips in different stages of falling and splashing.
Within ten minutes you should be getting pictures like these. Of course all the kit takes a while to find and assemble, plus the setting up takes an hour or so. Even finding a pair of pliers and a needle to pierce the bottle took me over twenty minutes!
Hanging your bottle from a lamp shade with a rubber band and clothes pegs works surprisingly well. And if you can't find a large black seed tray then maybe a bin liner dipped between four lengths of wooden batten will probably last long enough for this exercise. A cat litter tray will do, but watch out for unexpected puddles from Tiddles.
Does the floor get wet? Yes, but not much. Is this exercise time well spent? Yes, most definitely! Telephoto lens? 60mm to 105mm is best. Mirror lock up? No, the flash is way too fast. Coloured water? Not neccesary, just rely on the background that you're lighting to give you all the colour you need. Angle the flash from one side to reduce glare in the reflection. Also angle it slightly upward to keep the water dark, we want backlighting only via bounced light. With the flash set to manual extend the zoom to avoid stray light touching the water. Keep checking the front of your lens for splashes.
This last image shows a short length of four inch soil pipe as a support for the flash, a toilet pan connector is holding the magazine along with a pair of enormous clips from the garden. The magazine is sagging, which I deliberately left to illustrate how nothing has to be spot - on except the exposure and the focus.

Saturday 19 December 2009

Sharpening images in Elements 4 without halos. Keith Robins Photography has written a previous post referring to a rather unusual method of sharpening in Adobe CS3, but as most photographers seem to prefer sticking to the basic Elements I thought I'd try an alternative technique using Elements 4 with very similar results. Go up to Image in the top toolbar and choose Greyscale and your image turns black and white.
Now go to Filter - Sharpen - Unsharp Mask and move the percent slider up to 300%, yes really! The Radius stays around 0.8 and the Treshhold remains at Zero.
Save As under a new name so that you can reopen the same image from your files and folders, but this time you're going to keep it as a coloured photo.
Use the Move tool and hold down Shift while you drag the black and white picture into the colour image and then select the Overlay mode for this new top layer.
The colour of the lower layer shows through the black and white sharpness of the upper layer.
By clicking on each photo in turn you should be able to see which of these images has been sharpened.

Wednesday 16 December 2009

Keith Robins Photography tries sharpening with a big difference! Black and white photos of men can stand a lot of really gritty sharpening. I absolutely love these B andW pictures of Ollie, especially the biting sharpness. Ollie was a former member of Yeovil Camera Club back in the 7o's and willing posed for us.
I tried using unsharp mask but wasn't keen on the resulting halos and colour fringing often associated with normal everyday sharpening.
I vaguely remembered reading an article on the web last year suggesting Lab Colour mode as an alternative method of sharpening - so I gave it a go.
First thing is swap to Lab Colour mode, which is found under Image in the top toolbar.
Next, click on Channels in the Layers palette and select the Lightness layer. The other three layers will turn off when you do this. Find the normal everyday Unsharp Mask and whizz it up to 300% - don't worry it'll turn out just fine! (Obviously this 300% is not set in stone so just use that as a starting point, I have used as much as 500% with extremely good results.)
In the Radius box just beneath I went for 0.8 pixels and the bottom box, Threshold, was left at zero - click OK.
Click on the top layer to open up all the other channels again, then go back to Image and swap back into RGB mode. Select Layers as opposed to Channels and you're back in the world of good old layers which we all known and love.

In case you haven't realised I'm a supporter of Jpegs - I have tried RAW but found it decidedly soft and absolutely everything needed working on wityh evry single image - time wasting! I'll continue to let the camera do the donkey work and I'm not tempted to bother trying RAW again, thank you very much. I take around 400 pictures a week, mostly experimenting with lighting and unusual effects and I want to see them right away, full screen.
Besides, I can still use all the Adobe Camera Raw tweaks on my Jpegs prior to opening them in Photoshop. However, if you want to prove me wrong - go on then, I challenge you to make a better picture via Raw in the camera!
After sharpening these photos were changed to black and white using a Black And White adjustment layer in CS3 and moving the red channel slightly to the right and the yellow channel a little bit further. This lightened up the shadow detail in Ollie's features without blowing the brightness of his shirt collar.
I guess one day I'll get used to how Actions operate and that'll speed things up enormously, but for now I enjoy using Photoshop so I'll plod along slowly. Even so, each of these images took less than ten minutes to start looking really good, then I started playing around with oval selections, inverting them, feathering to 130 pixels and finally using another adjustment layer, Levels this time, to introduce a little darkness around the outer edges.
I also use the same 130 pixel feather to make a selection and then press Control + M to bring up the Curves adjustment box and then drag the line down a bit to darken, make another selction and use Curves again to make that selection slightly lighter. This seems to work in a more pleasing manner than using the Dodge tool or the Burn tool.

There were two lights used here, one via a shoot-thro brolly and the other bounced into a silver sunshield. Originally designed for a car windscreen on sunny days this £4 makeshift reflector is now supported on a couple lengths of plumbers piping. (See a previous post for info on how to make this easily assembled gadget.)
Ialso used a black blanket background supported on plumbers waste pipe and a short length of plastic guttering fixed atop a single lighting stand. I designed that litle gadget over twenty years ago and still find it extremely quick and simple to erect.
The tip of the brolly was less than eighteen inches from Ollie's nose and to camera left, while the reflector was about two feet away to camera right with the flash only just out of camera view. These lights are ancient and rather warm in tone so I either use a DIY colour balance card, or carry out a custom white balance which is easy on the Canon camera, plus just a little tweak in Adobe Camera Raw before opening up into CS3.

A setup like this uses very little space and most living rooms / lounges / or a large kitchen can be utilised. The studio flashes used here on Ollie are thirty years old and have no power controls, so my alternative set of Elichrom D-Lite 200watt would have been an absolute dream to use.
I ought really to sell those old lights on EBay but hey, old habits die hard. Alternatively, I could have used a couple of old hotshoe flashes with equally good effect. What I'm trying to say is, use whatever lighting you have lying around and instead spend your money on a better lens, or some versatile software such as CS3, or maybe a more patient or attractive model.
Incidentally, I recently spent a couple of hours making up a whole arsenal of tiny diagrams to suit my own lighting needs. These are saved as a huge number of layers and kept as a PSD file, which enables me to move them around, rotate, turn off the ones not needed and flipping over those facing the wrong way. I love Photoshop!!!