For a mere $249 (about £150), you can now buy a mount which enables you to use dSLR lenses on your iPhone:

The listing on the Photojojo site claims that: "Ever since the iPhone camera was invented, it's aspired to be what it simply never quite could be: a dSLR."

Hmmm... has it? Or has it always been a pretty average mobile phone camera with the advantage that you have it with you wherever you go and you have the choice of thousands of apps to edit your snaps on the go.

It goes on to say, "The iPhone mount gives you the real thing."

Hmmm... does it? So are they saying that pics taken on an iPhone with this contraption are really going to be on a par with those taken on a bona fide dSLR? There seems to be a failure to grasp that there's more to image making than just the lens. I notice that they don't make any mention of the sensor...

But wait, there's more - "You'll be putting the SLR lenses you already have to use with the camera you always have with you - your phone."

Hmmm...Well, I already use my SLR lenses with my SLR so it's not as though they're going to waste and the reason I always carry my iPhone around is precisely because it doesn't have a whacking great lens on the front.

They then pose the question, "Now that your favourite camera has it all, what are you going to do with your dSLR?"

Seriously? Who is this marketed at? Well, I think I'll carry on using my dSLR for higher quality photography and use my iPhone for iPhoneography thanks.

[Oh, and just in case my post hasn't put you off and you do decide to buy one, bear in mind that you can't adjust the aperture on newer digital lenses; focussing is a fiddly combination of manual focus on the lens and tapping the iPhone's screen; and because iPhones don't have a mirror, all the images will come out upside down so you will have to rotate them all in an image editor. Have fun!]