12-04-2010, 04:54 PM
[quote name='Brightcolours' timestamp='1291480107' post='4760']
No, it does not show PF and LoCA happening. It only shows LoCA happening (magenta blur to the front, green blur to the back).
All lenses that show LoCA (most wider aperture lenses and macro lenses) have exactly the same thing: Green blur on one side of the focal plane, purple on the other side.
Check photozone's more current reviews to verify that.
PF only is one colour, and only around very bright areas. It also usually only radiates to one side of bright "holes", where LoCA is in the whole blur/bokeh.
[/quote]
On LoCA colours, I'm just leaving the door open to the possibility someone might have used less conventional "glass" which might result in a different style of aberration even if I've not seen one yet.
Back on PF, if it is only to one side, that sounds like lateral CA.
Does that purple stuff in the top-left of my shot not fit the typical description for PF? It's purple, it happens when it's bright, it also happens on the apparent focal plane.
Just to nail this, next time I'm out I'll try to remember the EF 85mm f/1.8 which I think we can agree does exhibit PF, and will try and find some green leaves to shoot at with various defocus and see what happens.
No, it does not show PF and LoCA happening. It only shows LoCA happening (magenta blur to the front, green blur to the back).
All lenses that show LoCA (most wider aperture lenses and macro lenses) have exactly the same thing: Green blur on one side of the focal plane, purple on the other side.
Check photozone's more current reviews to verify that.
PF only is one colour, and only around very bright areas. It also usually only radiates to one side of bright "holes", where LoCA is in the whole blur/bokeh.
[/quote]
On LoCA colours, I'm just leaving the door open to the possibility someone might have used less conventional "glass" which might result in a different style of aberration even if I've not seen one yet.
Back on PF, if it is only to one side, that sounds like lateral CA.
Does that purple stuff in the top-left of my shot not fit the typical description for PF? It's purple, it happens when it's bright, it also happens on the apparent focal plane.
Just to nail this, next time I'm out I'll try to remember the EF 85mm f/1.8 which I think we can agree does exhibit PF, and will try and find some green leaves to shoot at with various defocus and see what happens.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.