Can a manual-focus lens be converted to autofocus on a Nikon D3300?
Asked 1/30/2015
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I’m using a Nikon D3300 and a 55-300mm Nikon lens. I’m having trouble getting sharp photos and thought the lens might be manual-focus only. Is there any adapter or accessory that can turn a manual-focus lens into an autofocus lens on this camera?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
2 Answers
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The Nikkor (i.e., Nikon-made) 55-300 is an AF-S lens and should autofocus on your Nikon D3300. Why you think it's manual focus only, I'm not sure.
If the lens is a Nikon-made one, but designated as AF, that doesn't mean it's manual-focus only--just that it will only autofocus on a body with a focus motor. You'd need to get a D7x00 or higher end Nikon body to make it autofocus.
If the lens is a 3rd-party non-autofocusing lens that does not communicate with the Nikon mount, there is no way to turn it into an autofocus lens. Autofocus requires electronic communication with the camera body, and (on a D3300), a focus motor. There are hardware elements that you cannot DIY and retrofit into a lens without a great deal of expense, trouble, and expertise. And most of us would count the cost of a new Nikkor 55-300 lens as a much easier solution. (see also: Do separate autofocus motors exist for entry level Nikon DSLRs?)
As for your photos being blurry, it may have nothing to do with your autofocus, and could be due to the shutter speed you're shooting at, or your handholding technique. Longer lenses require more care not to blur when used handheld--you may require a tripod or monopod.
See: What is the relationship between focal length and shutter speed?
Originally by user27440. Source · Licensed CC BY-SA 4.0
user27440
11y ago
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Generated from our catalog & community — verify before relying on it.
Usually, no—you generally cannot convert a manual-focus lens into an autofocus lens with an add-on. Autofocus needs built-in mechanical/electronic support in the lens and compatible communication with the camera body.
For your specific setup, check the exact lens model first: the Nikon 55-300mm AF-S is already an autofocus lens and should autofocus on a Nikon D3300. If it is a Nikon lens marked AF-S, the issue is likely not that the lens is manual-focus only.
If the lens is an older AF lens that depends on a body focus motor, the D3300 will not autofocus it because that camera body does not have an internal focus motor. In that case, autofocus would require either:
- a lens with its own focus motor (such as AF-S), or
- a higher-end Nikon body that includes a focus motor.
If it’s a fully manual third-party lens with no autofocus electronics or coupling, there isn’t a practical way to retrofit autofocus.
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