Z5 vs Z6 for Adapted Rangefinder Lenses

Started 2 months ago | Discussions thread
OP GCL Regular Member • Posts: 189
Re: Z5 vs Z6 for Adapted Rangefinder Lenses

Thanks for your reply and resources.

I appreciate that the purpose of the BSI sensor is to improve processing speed, but I have read in several places that an unintended additional consequence of a BSI sensor is that the sensor stack thickness is reduced and therefore rangefinder lenses perform better on BSI sensors (all else being equal). Those who use a lot of adapted manual focus lenses, particularly rangefinder design lenses, generally describe Sony A7x cameras as the worst performers with adapted rangefinder lenses, with a 1.9mm thick sensor stack, and Nikon Z6 and Z7 as the best for adapted lenses, with a 1.1mm sensor stack (and with Panasonic and Canon as in the middle - around 1.45mm for Panasonic, some have reported).

The theory as other have expressed it is that the placement of the circuitry above the photodiodes increases the thickness of the sensor stack and therefore degrades the corner sharpness and causes corner color shifts of images with adapted rangefinder lenses.

Good illustrations of the differences between BSI and FSI can be found here:

https://www.stemmer-imaging.com/en/knowledge-base/vorder-oder-rueckseitig-beleuchtete-sensoren/

Either way - theory aside and not everything necessarily being equal - I thought it would be interesting to hear from anyone who has adapted a manual focus lens, preferably a rangefinder wide angle lens, to see if they saw any performance differences between a Z5 and Z6.

 GCL's gear list:GCL's gear list
Ricoh GR III Nikon Z7 Panasonic Lumix DC-S1R Voigtlander 65mm F2 Macro APO-Lanthar Panasonic S Pro 70-200mm F4 OIS +13 more
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