Design and build quality
Pictured below from left to right are the Pentax DA 40mm f2.8, the DA 70mm f2.4 (shown twice with its supplied lens hood retracted and extended), and the DA 18-55mm f3.5-5.6 kit lens. Even with the kit lens adjusted to its 35mm focal length where the barrel is at its shortest, you can see straightaway how much smaller the pair of Limited Edition lenses are.
Measuring 63mm wide and just 15mm long (when focused at infinity), the Pentax DA 40mm f2.8 Limited is one of the smallest standard DSLR lenses in the world. Weighing 90g without its supplied lens hood, it’s also very light. Mount this on any Pentax DSLR and you’ll hardly even notice it; indeed it’s barely larger than a DSLR body cap. It’s easy to understand how it’s nicknamed a ‘pancake’ lens.
The Pentax DA 70mm f2.4 Limited lens is clearly larger than the 40mm, but still highly compact at 63mm wide and 26mm long (when focused at infinity). It weighs 130g without the supplied lens hood. We’ve pictured it above with its lens hood attached and in its retracted and extended positions – see below for details.
Both lenses are so short, there’s very little to hold onto, and you’re also likely to brush your fingers against the focusing ring when it turns during autofocus. But there is a slim ridge right by the mounts you can safely grip and both lenses are so light they need little ‘under-barrel’ support anyway. The K10D body also has a ridge on its left side which acts as a small grip for your left hand – see our Pentax K10D review.
Both lenses are supplied with lens hoods, but neither are the common petal designs. The DA 40mm f2.8 Limited has a very slim metal screw-on lens hood which adds just 7mm to the total length and could easily be mistaken for a lens cap. The lens cap itself is actually a smaller diameter metal disc which screws into the hood. The filter thread into which the hood also screws, measures 49mm in diameter.