35mm film negatives to digital ?

My wife found some of our old 35mm film negatives today.
I would like to convert some of them to digital.
I watched some youtube videos and did some googling, I learnt that you can do it with a yoghurt container and phone camera, or I can buy a gizmo off ebay to do it.

Can I use my D7100 and a macro lens while backlighting the negatives with a lightbox ?
Does anyone have any experience with this ? Any help would be appreciated.

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Nikon makes the "Slide Copying Adapter ES-1". It screws onto the front of your macro lens and you shoot an image of your slide. With a little careful manipulation, you can do a negative... I've used dedicated scanners and the little ES-1 is by far the easiest and produces the best results... the adapter is basically a two-part extension tube that lets you adjust the length of the tube so you can get a 1:1 ratio with any macro lens... it also has a frosted glass front element so you can point it at a regular flashgun or white light to get a nice soft diffused light...

Thanks for the help Marcel, Nick, and Fred.
Fred, that adapter sounds like it might be what I need, I will check out it’s cost and availability here. It will be Pre much a one use thing for me, as I won’t be taking any more film photos any time soon, or ever.
But as these are our Wedding photos, I would like to do a real and proper job of them.

Will let you know what I end up doing.

The first dozen are big fun. Then I sent the next 200 off to India for scanning.

As a sidenote, I think the ES-1 requires an FX body to work as advertised. I think I once figured out that DX cameras would require tubes.

I've messed around with some of the home-brew methods and got fair results, but the setup time was extensive and the adjustments required more patience than I possess. This digitized image is from one of my Kodachromes, taken with my D5100 using natural light behind the slide through a window. The slide is razor sharp, but I couldn't get the digitized image to be as sharp no matter how hard I tried. In view of my volume of slides, I'm headed toward a scanner, either the Epson V600 or V800.

I have most of my Dad's images that I need to convert. All kinds of negatives and slides. I had started scanning slides, but I can only scan 4 at a time. I will be following this post regarding the negatives.