We are most of us quite familiar with crop factor and the adjustment of focal length when using APS-C, Micro Four Thirds or 1in sensors. The maths is easy: 1.5, 2.0 and 2.7 covers these three options in relation to the 1:1 of the full-frame sensor. But what effect does sensor size have on aperture or sensitivity? It's all a question of equivalence.
Reader Ricky (/xxxxxxx) is also an enthusiast of minimalism by digitising as much as possible, from music to bank statements. In a comment to my post on XXXXXX he raises the interesting topic of protecting digital assets. Opponents of relying too much on computerised records often point to the possibility of losing all the data; yet often these same people rely entirely on filing cabinets stuffed with paper and, in extreme cases, carry their life around with them in the form of a giant Filofax. Who, I wonder, is taking the greatest risk?
Digitisation in the interests of minimalism is actually bar far the safer method of archiving, provided you know what you are doing and take basic precautions. There are three main threats to digital records: failure or corruption of storage media, theft and, lastly, loss through disaster such as fire, flood or magnetic interference from alien spaceships. We can't do much about the latter, but the other threats are easily managed.
Backup of data is crucial, of course - not just once but in several places. I use a Time Machine backup, plus an incremental backup on an external portable disk (which travels with me) and, to make absolutely sure, an incremental backup on a Drobo system. Next comes off-site backup. I cover this in two ways. First, is an incremental backup on an external disk which I leave with friends. Every week I connect it and perform an automatic backup.
I'm grateful to Engadget and Michael Gartenberg for reminding me that we've just passed the tenth anniversary of Windows Mobile. Microsoft introduced the new OS on 19 April 2000 in New York and set the scene for the PDA (personal digital assistant) for at least the next seven years, until the iPhone changed the world. Since then it's been a downward slippery path for WM, although Microsoft is now putting its efforts into Windows Phone 7 and early reports look promising.
I remember all this distinctly because I was front of the queue for one of the original Compaq iPAQs. It was a great device, I thought at the time, and the answer to my dreams of portable computing. It had a very nifty dock for the desk and it could be equipped with a variety of plastic sleeves--a bit like today's iPhone battery cases--that offered expansion facilities such as PCMCIA and Compact Flash cards.
Later models of the iPAQ including phone capabilities and was wedded to one of these for a whole year. It wasn't the most wieldy of phones, of course, but it made a good stab at doing the sort of PIM and communications tasks we now take for granted in the iPhone. But I remember it mostly for a very expensive incident when I had stowed the phone in the pannier of my motorcycle for a 200-mile trip. For some unfathomable reason vibration caused the phone repeatedly to dial the last number called. This number, unfortunately, was on the other side of Europe and I subsequently received an eye-watering phone bill. They say we live and learn....
I was loyal to Windows Mobile until two years ago when I finally gave in to pressure from the iPhone. Later PDA/phones such as the Treo 750 were a great improvement on the earlier devices, had a good keyboard and were pretty svelte. But synchronisation, particularly with Mac, was never super smooth.
The original Windows Mobile and the iPAQ, HP Jornado and Casio, represented a huge step forward in 2000. For the first time it was possible to have your office in your pocket. Now we have the whole world in our pocket.