Silverrails wrote:
What will be the difference between an AF-S and a AF-P Lens on my Nikon D3300 DSLR Camera?
Both AF-S and AF-P lenses have an in-lens focusing motor, allowing autofocusing on recent DSLRs. ("AF" Nikkors don't have an in-lens focusing motor, require a camera with a focusing motor in the body, which only the D7000 and higher models have. As a result, "AF" Nikkors will be manual focus only on D3000-series and D5000-series cameras.)
AF-S lenses use an ultrasonic focusing motor in the lens. This is the fastest focusing drive, best for action photography such as sports and wildlife and is used in more expensive, top-of-the-line Nikkors. (Similar to Canon USM, Sigma HSM and Tamron USD.) AF-S lenses are also referred to as "Silent Wave" drive... But while they are quiet, they aren't really "silent", so some focusing noises can end up in the audio of a video made with an AF-S lens on a camera.
AF-P lenses use a stepper motor for focusing. This is quieter, smoother acting and may be preferable for video. It is typically found in lower priced, more entry-level Nikkors. (Similar to Canon STM.)
Nikon has done a good job wringing speed out of AF-P.... Most users will see little, if any difference in focus speed. In some cases users claim AF-P lenses are faster focusing. However, often they appear to be comparing dissimilar lenses, which pretty much invalidates any comparison. (Note: Canon has been making ultrasonic and stepper motor lenses for a lot longer, but has only ever made one pair of of models using both forms of autofocus that are identical in all other ways and ideal for comparison of the focusing drives: EF-S 18-135mm IS STM and EF-S 18-135mm IS USM. In this case, Canon claims the USM ultrasonic lens is 2X to 4X faster focusing than STM.)
Don't worry too much about focusing speed with Nikon AF-P and AF-S though... both are quite fast. The differences are elsewhere.
AF-S lenses are the most widely compatible, can autofocus on pretty much all Nikon DSLRs. (There are still DX/crop and FX/full frame AF-S lenses to consider. Both DX and FX can be used equally well on DX cameras. FX cameras are best used with FX lenses.) In most cases, AF-S lenses have a mechanical connection between the lens' focusing ring and the focusing mechanism, which allows direct manual focusing at any time... even with the lens off the camera. Ultrasonic focus drives will not be harmed by manually overriding them, either.
AF-P lenses have limited compatibility with Nikon DSLRs. They're only able to autofocus on more recent Nikon DSLRs. They'll do fine on a D3300, but not on a D3200 or earlier... Fine on a D5500, but not on earlier... Fine on D7500, limited compatibility with D7200 and D7100 (camera firmware update necessary), and incompatible with D7000 and earlier. Because AF-P lenses are "fly by wire"... there is no mechanical connection between the focus ring and the focusing mechanism, it's all done with electronic communication.... AF-P lenses on "incompatible" cameras cannot even be manually focused. On compatible cameras, to manually focus the lens it must be "powered up"... the camera must be turned on and "awake". There can be other issues with AF-P lenses besides autofocus. For example, AF-P lenses with VR (image stabilization) typically have no switches to control it on the lens itself, it needs to be accessed through the camera's menu. There are exceptions such as the AF-P 70-300mm FX, which does have a switch to turn VR on and off.
Here's a fairly complete camera/lens compatibility chart:
https://www.nikonusa.com/Images/Learn-Explore/Photography-Techniques/2011/Which-Nikkor-is-Right-for-You/Media/NIKKOR-lens-compatibility-chart.pdfKen Rockwell weighs in on Nikon lens/camera compatibility, too:
https://www.kenrockwell.com/nikon/compatibility-lens.htmNote: The older compatibility chart at Nikonians.org doesn't included AF-P lenses, so I'm not linking to it here. (It does include AI-P, but that's are not the same as AF-P.)