This is especially noticeable on close subjects, where the focus can shift many centimetres. So, theoretically, an LTM lens could have the elements swapped for a Bronica and no-one would be any the wiser, note that I’ve not tried that.Īs the aperture closes, the lens’ focus point shifts. *1 This lens was the same optical design for the 35mm LTM system and the Bronica 6X6. These issues are largely rectified by f/11 or f/16, where the lens performs its best, but at those smaller apertures, another issue manifests: focus shift. As mentioned previously, outside of the 35mm image circle area *1, the Nikkor-Q 25CM f/4 is defined by its severe field curvature, coma, and distortion. The Bronica version of the Nikon Nikkor-Q 25CM f/4 falls mostly in the third category and somewhat in the second. They performed badly and were discontinued quickly.
#Bronica lens serial numbers serial numbers#
These serial numbers span a 788-digit range. The Unique Nikon Nikkor-Q 25CM f/4 for Bronica S2/S2A - EMULSIVE Close Search for:įor rare lens nuts reading this, Tony Hilton lists serial numbers 273365, 273414, 273495, 273631, and 273743.