After paving the way to new photographic standards in their recent DSLRs, can Nikon do the same with their flashguns? Matt Grayson is on hand to test the new SB-900.

Excellent build quality, Loads of features should cope with every scenario, 180 degree turning circle both ways, Extended range of up to 200mm

Expensive, Entry to menu not very clear

I've never been a fan of using flashguns as I prefer studio lights or ambient light, but I have to admit that if all flashguns performed to this standard, I'd use one. The build quality is excellent as is the menu system and I've even got to enjoy ...

You are about to read the test of 'the most advanced flash

Despite the high price of this flash unit we can still recommend it. Mainly due to the fact that as far as we're aware there is no other similarly specified competing product available. This is most likely going to appeal to professionals ...

The Sigma EF-500 DG ST promises to be a well equipped flashgun for the Pentax system and to find out Peter Bargh is seen flashing around Worksop.

Almost half the price of manufacturers own versions., Well built , Uncomplicated and easy to use, Built-in wide angle panel

Battery compartment lid flimsy, Focal lengths didn't match lens, Swivel and bounce locks independent

You more than likely already have a good meter in your camera, but there are benefits to owning a separate meter. While this model is more expensive than Sekonic's best selling L-308B, the comfort and flexibility of the swivel head is more than enough ...