Multi-exposure
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In part two of our Pentax 50mm lens round up, John Riley covers the emergence of the electronic lens era through to the present day. John provides a 50mm history, explains the K mount variants along with guide to their typical use.
Photograph titled 'The Paris Concert Edition II' by kasperbergholt selected as Pentax User's Photo of the Week.
2610 posts
9 years
Warwickshire
Mount securely on a tripod and use remote control, in manual exposure set at ISO 100 and f11. Focus and switch to manual unless you are set to back-button focus. Select multi-exposure average, in my case 3 exposure at medium speed. For white balance select multi-auto so that different light sources are given the same colour temperature. For the first exposure select a speed to expose the outside correctly, say 1/200, and attach a flash - in my case I had two attached, one AF-201FG on top the camera and an AF360FGZ II in my hand pointing to the right and both set at 1/4 output. For the second exposure I just pointed the handheld flash to the left so covering the whole field. For the last exposure both flashes were switched off and the speed slowed until the interior was exposed correctly.
In previous experiments I found with only one exposure matching the outside and two or more for the interior the averaging meant that the outside was still rather overexposed and strange artifacts appeared where blown areas had not merged well with normally exposed part. It occurred that even with just one flash I could take multiple exposures and just point the flash at different areas each time, avoiding the need for carrying lots of lighting to a location.
In this experiment the lens is pointing downwards to get more of the outside in view otherwise a horizontal position would eliminate the perspective distortion.
Having got the combined exposure about right I edited in Lightroom with the usual tweaks, reduced shadow and the green exposure and here is the result:
PS the downloaded image has come out rather unsharp but the original jpeg is pin sharp.