The use of Edge LED lighting, coupled with a local dimming system, has unsurprisingly resulted in a panel with some uneven pooling of light. This clouding only becomes an issue with very dark static images (such as end credit sequences) and its severity on our Panasonic TX-L47DT50 sample was certainly not as bad as it was on a Panasonic TX-L47ET50. No TV manufacturer yet seems to have cracked the problem.
There are countless ways in which you can tweak the Panasonic TX-L47DT50's image, but preset modes are limited to Dynamic (to be avoided), Normal, Cinema, True Cinema and two Professional modes that can be preset and stored. Intelligent Frame Creation is buried in the advanced settings sub-menu, but will inevitably need accessing from time to time.
Happily, judder is usually not so much of an issue that you'll often want to engage IFC, but when you do it's probably worth sticking to the minimum setting just to take the slight jerkiness off fast moving subjects.
With 1080p/24 Blu-rays, IFC is automatically disabled in favour of 24p Smooth Film mode, although this has very much the same effect. Thankfully, it too can be adjusted to minimum or even set to off, to avoid making movies look like they were shot on video camcorders.
Generally, HD feeds look wonderful. Live football and cricket on Sky have fantastic clarity and accurate colours, while No Country For Old Men and There Will Be Blood on Blu-ray are as dynamic and engaging as we've ever seen them, and shadow detail is very good.
The Panasonic TX-L47DT50 is certainly a capable 3D screen (gimmicky 2D to 3D conversion aside), Monsters Vs Aliens exhibiting negligible levels of cross-talk. It's not an unqualified success though, since the screen can struggle with low bit-rate standard definition Freeview broadcasts. A live feed of Europa League football on Channel 5 was so mushy as to be barely watchable.
Over in HD, meanwhile, the same match was sweetness and light. Even more reputable channels such as BBC 1 don't have the clarity compared with the same on Sky, with panel noise also more noticeable. On the positive side, the classic BBC DVD of Tinker Tailor Soldier Spy is nicely upscaled with barely any side-effects.
The operating system on the Panasonic TX-L47DT50 is no match for the look of the TV or its feature count. It lacks the set's exterior panache, but at least it's not unpleasant to navigate, and the much-despised advertising panes of previous models are no longer part of the GuidePlus EPG.
It's a shame that neither the Freeview nor Freesat EPG enables you to visually or aurally follow whatever's being watched, since both EPGs take you right out of the live feed. But consolation is provided with access to the ROVI alternative TV guide if you're connected to a network.
The VieraLink button on the remote does an efficient job of cutting to the multimedia chase, bringing up a dashboard with icons for the various entertainment sources connected to the TV.
Moving between apps within the smart TV portal is a sluggish process, but web navigation on the Panasonic TX-L47DT50 is a fairly efficient process with a cursor that glides quickly between links as you move it either up, down, left or right across the screen using the remote.
Inputting text without a physical keyboard is where TV-based web use becomes bothersome, and the absence of Flash compatibility means video footage playback is unassured.
The Panasonic TX-L47DT50's remote has a dedicated button for accessing the set's surround sound modes, comprising V-Audio, which enhances width to simulate improved spatial effects, V-Audio Surround (enhances width and depth) and V-Audio ProSurround, which is supposed to provide a more progressive enhancer and reverberation to simulate improved spatial effects.
Switching between music and speech has a much greater effect than engaging any of the three surround sound modes, even with full-bloodied and dynamic Blu-ray soundtracks. All three surround modes noticeably improve the sonic spread compared with the default setting, but there's nothing to choose between them. In many respects you're better off having a play with the set's built-in equaliser.
With a recommended retail price of £2,071 in the UK and $1,900 in the US, most of the UK's leading electrical retailers are offering the Panasonic TX-L47DT50 for a shade under £1,700. And some - such as John Lewis - are chucking in two free pairs of 3D glasses, too.
Considering its large size and how technologically well endowed the screen is, this doesn't seem excessive, but it feels like a large sum to pay for a 47-inch TV. Others may do it a shade better but there's very little not found on the Panasonic TX-L47DT50 that can be found elsewhere for the same money.