Not sure exactly how aperture blades make anything “like a DSLR” but I digress.
This will not practically do anything for increased depth of field, unless you are focusing on something in very close range. The tiny sensors in iPhones means that everything is already rather in focus most of the time. Extreme close focusing is practically the only time you ever get even a hint of a blurred background.
What it *might* do is make for better quality photos in sunlight - ie. The sensor is optimized for a particular sensitivity, and instead of adjusting for bright exposures electronically, it would just let less light reach the sensor.
This could also backfire horribly, as again, at such a small sensor size, decreasing the aperture only means that diffraction sets in faster. This would result in a loss of sharpness and resolution. Just the nature of optics and the physics of light.
On 35mm film or -an equivalent full frame sensor, diffraction already starts having a noticeable effect around f/11-f/16. iPhone sensors are much, much smaller than that.
The only scenario where I could guarantee this to be truly helpful is for photographing VERY bright scenes that normally could not be captured on a phone. Like, shooting into the sun. Even shooting the moon at night can be particularly bright and difficult to manage on a phone.
This will not practically do anything for increased depth of field, unless you are focusing on something in very close range. The tiny sensors in iPhones means that everything is already rather in focus most of the time. Extreme close focusing is practically the only time you ever get even a hint of a blurred background.
What it *might* do is make for better quality photos in sunlight - ie. The sensor is optimized for a particular sensitivity, and instead of adjusting for bright exposures electronically, it would just let less light reach the sensor.
This could also backfire horribly, as again, at such a small sensor size, decreasing the aperture only means that diffraction sets in faster. This would result in a loss of sharpness and resolution. Just the nature of optics and the physics of light.
On 35mm film or -an equivalent full frame sensor, diffraction already starts having a noticeable effect around f/11-f/16. iPhone sensors are much, much smaller than that.
The only scenario where I could guarantee this to be truly helpful is for photographing VERY bright scenes that normally could not be captured on a phone. Like, shooting into the sun. Even shooting the moon at night can be particularly bright and difficult to manage on a phone.