Now for the test of the extreme macro capabilities of this lens.
1) I used the BPM bellows to shoot UV-induced visible fluorescence (UVIVF) of the Cosmos flower. These were 106 images stacked with Helicon Focus – I have to say the results are not perfect, so I need to do some more homework to try and improve on this.
2) The second test are images of my iPhone 5S retinal display showing the thumbnail of a screenshot of my website in the Photos App. The first shot is taken with Olympus EM-5 + 60mm F2.8 macro lens at 1:1 for comparison.
When I looked at the image of the 100% crop from the A7R + Coastal Optics on the iMac, I can see a 3-D appearance of the 3 different coloured pixels making up the display.
I do like the Coastal Optics 60mm F4 APO lens, as it is a great lens even with its hotspot issue, and is my most used lens currently. That is because it is very sharp and has capabilities that very few camera lenses have (especially as I like to shoot UV images), and the hotspot issue is not an issue for me.
For normal examples of macro imaging using the Coastal Optics, please go to my posts of the flowers on this website, as most of them have been taken with the Coastal Optics 60mm F4.
Equipment: Sony A7R, Coastal Optics 60mm F4 APO, BPM Bellows, Nightsearcher 365nm UV Torch