SMC Pentax-M 100mm f4 macro

I’ve had this lens for years but never really used it apart from for the odd indoors figure shot. With spring rapidly approaching there is an abundance of flowers & blossoms lining my path to the lab every morning (dissertation deadline is looming, so every day is a lab day even in the current ‘holiday’) so what better subject for macro shooting? I need to do a more scientific test comparing the performance at different apertures, but all of these were at 5.6 & I’m already getting a feeling of what this glass is capable of.

I’ve noticed a little bit of CA, but I’ll need to do more testing to see how bad it can actually get.

These were all shot on my K20D, which has a 1.54x crop sensor & I cropped this shot down quite a bit in Lightroom as well, but it still has plenty of detail.

A 100% crop of the above.

Definitely my favorite from this morning’s walk, the flower on the right is tack sharp. This one is cropped down even more than the last one, I cut out maybe as much as 40% of the frame.

Once again a 100% crop for you to peep at.