rscheffler
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 p.15 #6 · p.15 #6 · Pre-order: Voigtlander APO-SKOPAR 90mm f/2.8 VM and F-mount | |
Juha Kannisto wrote:
Do you see noticeable differences with regards to OOF area in front of focus plan on these pairs?
Ripolini wrote:
Thank you very much. Yes, I do see differences. The foreground looks less nervous with IBIS off, in particular when comparing image #DSC08660 to #DSC08661.
Yes, some differences seen between #DSC08660 to #DSC08661.
#DSC08660 (with IBIS) has a slightly sharper background (building details upper left and right sides). Either there was some slight manual focus change when the camera was adjusted to turn off IBIS (there are about 30 seconds between captures), or the movement of the sensor for IBIS affected the plane of focus slightly. Bottom left of DSC08660 is where I see the biggest differences. The non-IBIS image's rendering in this foreground area is still harsh but without the extra blur possibly induced by IBIS.
Between #DSC08629 and #DSC08630: DSC08630 has slightly better micro contrast/detail IMO. I.e. the tree's bark is sharper, the texture if the green equipment box is clearer, as are the leaves around it. OOF speculars in the background of DSC08630 have slightly more clearly defined edges in many places. In the most OOF areas of the foreground pavement, the OOF speculars seem slightly more defined in DSC08629. But there's also ~90 seconds difference between the two photos and potential variables at play, such as slight inadvertent adjustment of the lens's focusing ring, etc.
Juha, do you consider yourself to have good technique while shooting? Meaning, you have steady hands and concentrate on keeping the camera steady at the time of exposure even though the camera has IBIS? I only wonder a little because every so often I have seen signs of camera shake in an image, but usually at what otherwise would be a marginal shutter speed without the benefit of IBIS (IIRC there's one in the set of a sign shot around 1/20 that shows some camera shake). Also your preference for vertical compositions is a less comfortable way to hold most cameras. This simply meant as an observation and not as a criticism of your work, from which we all have much benefitted over the years of Voigtlander releases.  I think we can all appreciate that these are walk around photos to given an impression and not locked-down test photos meant for rigorous technical analysis. To make rigorous comparisons is a whole other level of work/effort...
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Anyhow, still feeling much steadier with IBIS when focusing with a 90mm lens (that's why I only have shorter focal lengths natively for my Sigma fp that has no IBIS, up to 70mm).
