RichieC wrote:
Not just an AF deal... my prime Zeiss Milvus and Distagon lenses both were able to move past infinity to a less than sharp point. I always watch the focus indicator on my viewfinder, and then back it off just a tinch, if you were to focus and shoot using hyper focus settings, you'd find that the infinity mark you line up for your fstop, is well before the infinity physical stop... in fact, therein lies the clue as to what you may consider you are doing wrong.
If you focus at infinity, then your far side of DOF from focus point is being wasted on infinity, where you are loosing the total useable DOF in front of your focal point. This may very well be a sizeable area in real estate. You may focus on something before infinity, or refer to you hyperfocus marks till you get a feel for it. Note just how many football fields, or even miles, of useable DOF you realy have to work with using your particular lens and fstop. Then never feel the need to slap the lens around till you hit that wall past "infinity", you are already in focus for distance well before you hit it!
Not just an AF deal... my prime Zeiss Milvus and D... (
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Many times I'm make these images wide open and the idea is to have the stars in sharp focus. If not set on infinity, won't be in sharp focus, how can I be doing it wrong? I do expect lenses focused on infinity mark to have sharp focus on stars, and it would be nice if the lens hard stop was at infinity is what I'm getting at. Always worked in the past with manual focus lenses.