40-150 PRO focus breathing?

Anders W wrote:

CrisPhoto wrote:

...

Hi Christof,

Thanks for that. Quite an ambitious little exercise. Much appreciated.

Note, however, that the figures for the 75-300 are not right. This lens manages a focus distance of 0.9 meters only at 75 mm. At any other focal length, the minimum focus distance, is 1.5 meters. At 300 mm, which is where it manages a reproduction ratio of 0.18, its effective focal length is 194 mm, not 116 mm. And are you sure its MTF-values too are going down the drain at close distance? I haven't really tried to test it but ...

Hello Anders,

thanks for the hint, here the updated table. sorted by magnification "R":

Corrected table, real and measured specs

The 40-150 PRO lens has spoiled me, this little wonderful jewel works very reliable from macro close-up to tele. Made it very difficult for me to buy a walk around lens this year, hard to take a step back regarding IQ.

Here is a fast comparison of 40-150 PRO, Panasonic 14-140 II, Olympus 40-150 I and the PanaLeica 14-150:

This is the scene captured by the P 14-140 II, you can see the loss of detail and the weak color contrast even in this smallish screen shot

This a 100% crop of the scene above. (improved version with less dramatic difference, sorry, first version of this crop was not on the focus plane which was not on favor for the 10x zooms)

These were shot from a good tripod (I have a better one now), hand held the decrease of sharpness would have been even worse ...

Regards

Christof