T
thearne3
Guest
Now that I'm getting used to filing lens mounts, the question arises: how do you know when you've reached 'infinity focus'? I have been testing by taking a picture of a building approximately 300 yards away - at f2, f2.8, etc, to f11. I then compare the shots at 100% (I don't use f1.3 because it is so poor) The smaller apertures (higher f stops) come into focus sooner. I then compare the shots and keep grinding until f2 is in focus. Not very precise!
Are there any rules of thumb here? Is 300 yards a reasonable proxy for infinity? The longer the distance, the more lens resolution would seem to affect changes in perceived focus/sharpness. Looking at images, 300 yards may be too short a distance, but it's hard to tell!
Thanks for any help...
Are there any rules of thumb here? Is 300 yards a reasonable proxy for infinity? The longer the distance, the more lens resolution would seem to affect changes in perceived focus/sharpness. Looking at images, 300 yards may be too short a distance, but it's hard to tell!
Thanks for any help...