|
TheAngryDrunk posted:Well, there's optical vignetting that comes from the lens elements and then there's mechanical vignetting that comes from something blocking light from hitting the lens entirely. Lens hoods have to be designed in such a way so as to not cause mechanical vignetting. They're not the cause of optical vignetting. Project a square onto a cone and you'll get a petal shape, so you can have a much deeper petal hood than you can a solid conical hood, allowing you too block more light without producing vignetting. The only downsides of a petal hood are that they rotate with the front element, so you need a non-rotating element (which is good for a number of other reasons) and they could theoretically be more expensive to manufacture. I would guess that in practice their production cost is not significantly higher than a circular hood, though.
|
#
¿
Jul 6, 2012 04:12
|
|
|
|
| # ¿ May 5, 2024 23:14 |
|
|
RangerScum posted:Yeah I was joking, but it's not just their low end bodies, it's their upper tier poo poo as well. The D2h sitting on my desk begs to differ! You've got to tell it what the max aperture is whenever you get a new lens though. It stores it by focal length.
|
|
#
¿
May 1, 2015 18:34
|
|