LowLightFotography

LowLightFotography

RAF Northolt Night Photo Shoot XVII ~ 23rd October 2014

    Although a 24-70mm lens would have been suitable for RAF Northolt I wanted something with a bit extra reach for close in shots and as there isn't a suitable small long reach zoom lens available for the A7 family of cameras until the Sony FE 24-240mm f/3.5-6.3 hits the streets in February 2015, I bought a cheap second hand Tamron 28-300mm f/3.5-6.3 XR DI LD Lens for the Sony Alpha full frame A-mount camera to fill the gap. The down side is that although I have it attached to a Sony LA-EA4 Mount Adapter, that allows the use of any A-mount full frame lenses on the A7, the lens was originally issued in 2007, a new version has just been released, and the auto focus is not compatible with the adapter. As I have a couple of manual focus Samyang lens for my Sony NEX-6, manual focusing isn't really a problem for me.

    There are two functions on Sony cameras to aid manual focusing which can be viewed in the electronic viewfinder. They are 'FOCUS PEAKING' which basically overlays a flickering colour, either white, red or yellow, on the screen to indicate   areas that   appear   sharp  or  have  a high  contrast and ZEBRA stripes which places diagonal black/white lines into areas of the image indicating that are to bright and need to be adjusted. These are functions carried over from video cameras.  

    Although the lighting conditions at RAF Northolt are excellent for night shoot photography I was trying to keep the ISO as low as possible but hand holding and having to keep the shutter speed in double figures to compensate for the lack of in-camera and lens anti-shake, meant the ISO was getting rather high at times as I was trying to keep the ISO at around 12,800 maximum. I did resort to using High ISO Noise Reduction and Hand Held Twilight Mode, to control the ISO, and I was surprised at the quality of the processed image which is much better on a full frame sensor than a cropped frame sensor. Towards the end of the evening, one of the set of lights went out throwing the Bronco into darkness so I upped the ISO to 409,600 and rattled off a couple of shots. Apart from arty images, definitely not usable for anything.  

RAF Northolt Night Photo Shoot XVII ~ 23rd October 2014

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