Click on the image below to check out the image quality possible with a common retail market Schneider Componon lens. Click on the image to see a larger version, right click/two finger click and select option Open Image in New Tab, or Save As. To make sure the image is full size, check the URL, it should end in 2500, if not, change it to 2500 and refresh/return.
In the past I have had really good luck with the amazing Schneider Componon 28mm f4 lens but this time I’m sharing an example made at 4.3x magnification and an astounding aperture of f/2.2! That is more than a stop wider than wide-open!
The most impressive part of the performance shown in the image above? The corners are almost identical in sharpness and resolution compared to the center. That is really hard to find in a lens, even with expensive macro lens, and almost never wide open. Center to corner consistency wide open is really, really rare.
To put the Componon’s maximum aperture in perspective, remember that a wider aperture has the potential for higher resolution (the highly regarded Mitutoyo M Plan 5x objective has a nominal aperture of only f/2.9)
I will post more about how to set up the Componon for f/2.2, until then be sure to click on the image above to a better idea of the kind of image quality that is possible with a stacked setup using a lens like the Componon.
For more about the performance of the 4/28 Componon see these tests here on Closeuphotography.com;
$50 enlarger lens vs Mitutoyo M Plan APO 5x test:
https://www.closeuphotography.com/50-dollar-componon-vs-mitutoyo-objective
The f/2.8/28 Componon f/2.8 version vs. the Mitutoyo M Plan 5X (pushed down) at 4.3x:
https://www.closeuphotography.com/schneider-kreuznach-28mm-f2-8-componon-lens