There's been some interest in including price/value information in my Pentax P-TTL Flash Comparison. However, since I don't want to add "keeping prices up to date" to the list of things to manage in that article, I've created this shorter and more informal Knol instead.
This page will be updated with more data and different visualizations shortly. In the meantime, this list correlates the flash burst index of relative potential coverage from the full article with price. The Pentax AF360FGZ is the baseline at 1.0, and higher numbers indicate more flash coverage per dollar.
It's incredibly important to note that while this index by its nature takes flash zoom into account, it ignores all other features, many of which are rather important to not ignore. But if you're just looking for maximum light for your money, the Sigma EF-530 DG ST looks pretty good — and the Super version isn't bad either.
Also remember that the guide number data is from manufacturer-stated numbers, not from testing.
Where possible, prices were gathered from B&H Photo, and where not possible (B&H doesn't carry Promaster), I used Hunt's Photo. Where that wasn't possible (the Metz 54 MZ-4i, for example), I basically guessed. A future version of this article may include a better pricing methodology, if I can think of one.
The Sakar / Digital Concepts AF952/PEN flash can't be included because it's impossible to judge flash coverage without good guide number data. The flash is available for $189 from online discount retailer BuyDig.com — they're not B&H, but I've had decent luck with them. But you could buy a much less sketchy flash for that kind of money.
This page will be updated with more data and different visualizations shortly. In the meantime, this list correlates the flash burst index of relative potential coverage from the full article with price. The Pentax AF360FGZ is the baseline at 1.0, and higher numbers indicate more flash coverage per dollar.
- Sigma EF-530 DG ST: 2.8
- Promaster 5550DX: 1.9
- Sigma EF-530 DG Super: 1.7
- Promaster 5750DX: 1.6
- Pentax AF540FGZ: 1.6
- Metz 36 AF-4: 1.6
- Metz 48 AF-1: 1.5
- Promaster 5250DX: 1.5
- Promaster 7200EDF: 1.5
- Promaster 7400EDF: 1.3
- Metz 58 AF-1: 1.3
- Promaster 7500EDF: 1.2
- Pentax AF360FGZ: (baseline)
- Metz 54 MZ-4i: 0.9
- Pentax AF200FG: 0.9
It's incredibly important to note that while this index by its nature takes flash zoom into account, it ignores all other features, many of which are rather important to not ignore. But if you're just looking for maximum light for your money, the Sigma EF-530 DG ST looks pretty good — and the Super version isn't bad either.
Also remember that the guide number data is from manufacturer-stated numbers, not from testing.
Where possible, prices were gathered from B&H Photo, and where not possible (B&H doesn't carry Promaster), I used Hunt's Photo. Where that wasn't possible (the Metz 54 MZ-4i, for example), I basically guessed. A future version of this article may include a better pricing methodology, if I can think of one.
The Sakar / Digital Concepts AF952/PEN flash can't be included because it's impossible to judge flash coverage without good guide number data. The flash is available for $189 from online discount retailer BuyDig.com — they're not B&H, but I've had decent luck with them. But you could buy a much less sketchy flash for that kind of money.
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