How can I get auto-focus to work?

I use a Nikon D3100 and I take portraits of teens. I recently invested in a AF Nikkor 50mm 1:1.8D lens but the auto-focus doesn't work. I didn't mind practicing with the manual focus but when I take portraits with that lens, sometimes they come out a little blurry. I wanted to try and use auto-focus again and had someone suggest to me that I buy a AF-S DX Nikkor 35mm 1/1.8G lens… It came in the mail today and I like how the pictures come out, but… Still no auto-focus. I have looked up both manuals, and I seem to be missing something!

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My Nikon D5300 camera fall in water it's working but the viewfinder is blury what should i do to remove the blur?

My Nikon D5300 camera fall in water it's working but the viewfinder is blury what should i do to remove the blur?

Read more: My Nikon D5300 camera fall in water it's working but the viewfinder is blury what should i do to remove the blur?

Is the nikon D2H camara have a video recoring featues?

Is the nikon D2H camara have a video recoring featues?

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Size cam. Lens for person?

I d like to shoot a person on a podium about 30 away. I d like a prime f 3.5 will do.
Don't need him to fill the too much.

Nikon 750

Thanks

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My Nikon d3100 camera keeps saying when I put my SD card in this card is not formatted. Format the card. Please help. I've tried multiple?

cards and none will work. I have formatted them on my computer and on the camera itself and it continues to say this. Please help with this problem!

Read more: https://nikonmag.com/talk/dx/my-nikon-d3100-camera-keeps-saying-when-i-put-my-sd.html

Nikkor 14-24 on D3100 body until I can afford a full frame sensor?

Does anybody have any insight on using a the lens on a cropped sensor? I want to invest in something that will last down the road for my shots, but want to know if it will be worth it in the mean time with my cropped sensor.

Thanks.

Read more: Nikkor 14-24 on D3100 body until I can afford a full frame sensor?

Best dslr for a beginner?

I'm interested in photography and my budget is 50k… I decided to buy nikon d3300(that comes with dual lens 18-55 and 70-300) plus prime lens 50mm f1.8… Is it good or any other options should i be considering?

Read more: https://nikonmag.com/talk/best-dslr-for-a-beginner.html

Which dslr to prefer nikon d750 or anything else in same price range (body only)?

Which dslr to prefer nikon d750 or anything else in same price range (body only)?

Read more: https://nikonmag.com/talk/which-dslr-to-prefer-nikon-d750-or-anything-else-in.html

Cosmicar Television lens and Nikon?

Do the two go together? Nikon d5100 and cosmicar pentax tv lens 6mm 1:1.2

Read more: https://nikonmag.com/talk/dx/cosmicar-television-lens-and-nikon.html

Do FX lenses that are used on FX cameras greatly increase the quality of the pictures compared to FX cameras using DX lenses?

I'm a beginner photographer who purchased a Nikon D850. It's the second dslr camera I've purchased since I upgraded from a Nikon D3200. I purchased a D850 and use a DX lens instead of an FX lens because my previous camera used that lens so I decided to give the DX lens a try on my D850. So far I've taken a couple of pictures in auto settings but when I zoom in to see the focused area of the pictures, the pictures look blurry. I'm wondering if they look blurry because of the DX lens or if it may be because some other reason. I'm planning on getting an FX lens to see if it fixes the blur issue. I hope that switching to that lens will greatly improve the quality of the pictures. Has anyone seen a huge difference in quality with full frame FX cameras when taking pictures with FX lenses compared to DX lenses?

Read more: Do FX lenses that are used on FX cameras greatly increase the quality of the pictures compared to FX cameras using DX lenses?