“There’s no question: time to dump your old M240 while you still can. It was too big to be considered a real LEICA… Who were they kidding? Ditch your M240 while you still can. I never kept my M240; I sent it back and have been using my M9 ever since for its smaller size and much faster and simpler operation” — Ken Rockwell in his review of the M10
Small dimension changes can feel quite different. When the M3 came out there were complaints about the size from IIIf users; Leica bragged the M5 was only a finger-width larger than the M4 – but people thought it was huge; the M9 felt too thick compared to an M6; etc. Then there are the people who complain about the size of the M240 and then add shit to it (half case, grip, EVF, thumbs up, soft release, etc.) And then there’s Ken Rockwell.
Yo, Ken: Leicaphiles bitched about the 2.5″ LCD of the M9. Leica put a bigger one in the M240. People bitched about the battery capacity of the M9. Leica fixed that with the M240. Those two upgrades take up room. The difference between the M240 and M9 can be attributed to the need to accommodate the larger rear display and the thumbwheel/rest. Even so, the 240 is virtually the same size as the M8/9 and only a few mm thicker (and the same width and height) than the M6TTL.
Here are some relevant numbers – M240: 139x80x42 millimeters – M9: 140x80x38 millimeters – M6: 138x77x38 millimeters. The M240 is 0.15748 inches thicker than the M9 and M6.
If you’re looking for a digital M, the M240 currently a screaming deal, not much more than a ratty old M8 and about the same as the much inferior M9. You can buy two lightly used M240’s for less than the price of a used M10. I beg you to find any significant difference in their output (If you’re one of those insufferable people who judges a digital camera on its DXO score, the M240 and the M10 are basically identical in terms of claimed IQ, the M240 actually scoring better overall dynamic range while the M10 has marginal better high ISO performance).
The M240 isn’t bigger, it’s heavier. More weight can cause users to grip the camera differently, affecting the perception of size. The Barnack IIIf weighed 430 grams (.947 lbs), for instance, while the film M’s weigh in the neighborhood of 600 grams (1.32 lbs). The Leica M9 is 585 grams (1.28 lbs). The M240 is 678 grams (1.49 lbs). The ‘added weight’ of the M240 over the film M’s (.17 lbs!) is due to the larger battery, which is the first digital M battery that’ll last a whole day of shooting. The film era sized 2017 M10, while lighter than the M240, is back to the smaller, less powerful battery of the M9, and users are back juggling multiple batteries if they intend to shoot all day. But hey, it’s .15 inches less thick. One step forward, one step back.