Leica Diary - Everything within Reason

Ever since the release of the Leica M9 in 2009 I wanted one of them. But, at the time I didn't have the funds to acquire such a device…. until recent.

Last week I bought myself a Leica M9 (black) along with two Zeiss lenses and an additional battery. The glass of my (second) choice was the Zeiss Biogon 2.8/28mm ZM T* and the Zeiss C-Sonnar 1.5/50mm ZM T*. These lenses were second choice, because I'd rather had the Leica versions of those lenses, but these are kinda hard to get your hands on (extremely long waiting lists).

UPDATE: In the meantime, I acquired a 35mm Summicron-M f/2, and a 50mm Summilux-M f/1.4 Asph. The Carl Zeiss C-Sonnar 1.5/50mm ZM T* is for sale at this moment.

The following posts should represent my experiences with the Leica M system camera, and I hope to address both the good and the bad things about this legendary camera system.

Note that this 'blog' holds the oldest post first. The reason for this is that you can read it in a chronological fashion. So the updates will be at the end.

Entries in focus-shift (2)

Tuesday

Jul052011

Day 8: Focus-Shift

Tuesday, July 5, 2011 at 19:04

No matter how extensive your research is, there's always something (bad??) you miss. In this case it's focus-shift with fast lenses. Focus-shift means that the actual focuspoint is not exactly where you might think (also known as front- or backfocus). In the case of the Zeiss C-Sonnar 1.5/50mm it occurs generally @f/1.5 or @f/2.8. My Zeiss 50mm has this 'problem' @ f/1.5, which means that the lens is calibrated for film. Problem is a big word, since it seems to be inherent to the C-Sonnar design. It's also something that occurs a lot with a rangefinder system.

To solve this, I need to focus on the ears instead on the eyes when I shoot a portrait, or just compensate bij moving a bit forward after focussing. I could have Zeiss recalibrate the lens for free (while still in warrenty), but that means shifting the problem to another aperture.

If it turns out to be a real problem, I could always go for a Leica M Summicron 2/50mm (which I have still on backorder along with the Leica M Summicron 2/35).

Willem |

Day 11: Another Day in the Field

Friday, July 8, 2011 at 16:30

After the scare of the focus-shift had settled, I 'mastered' the compensation technique for this 'problem'. Turns out that moving myself about 2 inched towards the object AFTER I focussed on it, the object would be in focus (results may vary depending of the distance to the object). The further you're away, the smaller the compensation needs to be.

Both images were shot @ f/1.5 (Carl-Zeiss C-Sonnar 1.5/50mm ZM T*) with a focus distance of 2 to 3 metres with little to no compensation for the focus shift. In the first image there's a bee just left of the flower/weed.

Willem |