YYV_146
Well-known
I recently acquired a 135mm f2.8 Smooth Transitional Focus lens and wanted to see how good the acclaimed "bokeh machine" really is. The STF is mounted on an A7 with the LA-EA3 adapter. To adjust for FOV I shot the 90APO on a NEX-7 and used f2 instead of f2.8. Pictures were adjusted in photoshop for netural WB and the removal of compression artifacts.
I tested for both foreground and background bokeh, and can confirm that contrary to what I've read elsewhere, there is essentially no difference between them for the STF.
I tested for both foreground and background bokeh, and can confirm that contrary to what I've read elsewhere, there is essentially no difference between them for the STF.
YYV_146
Well-known
The change in the field of view is purely because of breathing. I am actually a bit surprised at how much the STF's image changes with the focal point...The APO cron's FOV is however consistent through 1m - infinity.