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hm.. for me, shooting wide open at ~5ft, focus and recomposing doesnt work well, haha. for landscapes that prob works fine.
For verification, for portrait work I use my 50mm 1.4G, 85mm 1.4G and 135 DC2.0. I use my AIS lenses (20 2.8 AIS, 24 2.8 AIS, 28 2.8 AIS and 50 1.2 AIS) and a 40mm f/2.0 Voigtlander for landscapes. As a side note, I usually shoot f/5.6 to f/11.0, but will often use the 50mm at 1.2 because I like the look of the “defective” optics at 1.2 on certain subjects, meaning the strong spherical aberration.
Regarding the backbutton, I used Spraynpray’s technique for the first year of shooting my D800, but after the back button technique was brought up in a previous thread on this forum, I switched to that and never went back. The advantage is that I can focus on something off centre while using the centre focus point (single point mode) and then take several shots after I recompose. I have to cycle through this process for every shot if I don’t use backfocus. Also, critically for landscapes, I can focus on a hyperfocus point using back focus and not have to worry about resetting the focus as I shoot. It is faster for me and I feel like I have more control.
Maybe there is still a better technique, but having switched from focusing with a semi-depressed shutter button to back focus, I will never go back.
And of course, if I am at f/1.4 or even anything less than about f/4.0, I move the single focus point to that critical closest eye. But I still use backbutton focus.
There is no focus and then recompose. If you are shooting less than about f/4.0, that can be problematic because the distance between the sensor and subject's focus point changes (even if the subject is still). Think the different sides of a triangle. With the paper thin focus wide open, this is a problem and just to be on the safe side, I change my technique at less than f/4.0.
@WestEndFoto I do not recompose. I use the different focus point option based on what I am shooting and place the priority sensor on what I want in focus and shoot without recomposing. In the example of the wedding I would have the priority sensor on her eye if I am shooting with a shallow depth of field. In other scenarios I may use group or dynamic 9 or 21. The group has four priority sensors where ss the dynamic 9 and 21 only have one. I am not a fan of dynamic 51 or the 3D options. Using this technique I find that I have a higher success rate of getting the image I want without shooting burst and hoping I got it