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Here's what the Public Lab 8mm looks like pointing straight forward
I'm happy with the focus on the F1.2. The F1.5 does not seem quite as sharp as the F1.2 anywhere in the frame, either close up or far away. However there's not much difference between them in terms of detail or motion blur.
That's Bernie and Jane Sanders
From all of you who have done extensive testing on focus, is there a recommended "most useful" focus distance for dash cam applications? I realize that that depends on the lens, but say for the popular F1.2, 4mm for example.
I've installed my F1.2 the back camera because for the front it was a bit too narrow as compared to the stock A lens. In my case image quality was not the highest priority since the optical path goes through 3 layers of glass. Rather I needed something a bit more narrow to actually capture an useful image, other than just my engine bay (yes, the engine is in the back in that car ).
From all of you who have done extensive testing on focus, is there a recommended "most useful" focus distance for dash cam applications? I realize that that depends on the lens, but say for the popular F1.2, 4mm for example.
I agree the F1.2 appears slightly sharper. But not by much.@TonyM, the two lenses look quite similar, even at speed. If anything the plate numbers on the ƒ/1.2 seem a bit sharper to my eye. I'll need to look more carefully at the videos when I have time as my crappy bandwidth makes viewing YouTube a bit of a hassle.
The clips from both cameras start with a cyan shift. The F1.5 goes back to normal at around 27s, then shifts cyan again as you noticed around 38s. Both cameras shift back to normal at around 55s.I did happen to notice a CYAN color shift after a RED object enters the FOV on the ƒ/1.5 lens similar to what I experienced with the A2 lens on the Mobius. Observe the ƒ/1.5 video carefully at 38 t0 40 seconds just after the two red cars go out of view. The effect is subtle and doesn't appear quite as serious as I encountered with the A2 lens Mobius but it's definitely there and doesn't really seem to appear on the ƒ/1.2 lens video.
I agree the F1.2 appears slightly sharper. But not by much.
The clips from both cameras start with a cyan shift. The F1.5 goes back to normal at around 27s, then shifts cyan again as you noticed around 38s. Both cameras shift back to normal at around 55s.
I was just about to say that I'm using profile A for all my lenses, for the sake of comparison. I had noticed that these 4mm lenses were cooler than the stock A and A2 lenses. My 6mm F1.2 is also cool, whilst the 25mm f2.4 that I tried is much warmer.Which default lens setting are you using? The "A" setting tends more towards blue and cyan than the others which willl be warmer.
I was just about to say that I'm using profile A for all my lenses, for the sake of comparison. I had noticed that these 4mm lenses were cooler than the stock A and A2 lenses. My 6mm F1.2 is also cool, whilst the 25mm f2.4 that I tried is much warmer.