Nikon D40 has a rectangle with yellow ‘waves’ in it on the digital screen

The only thing that comes to my mind would be the histogram:

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Hit the ‘play button’ so you see the single image (with histogram). Then hit the ‘up’ or ‘down’ buttons on the wheel on the right side of the back of the camera.

That cycles through two information screens, histogram and regular display.

d40 Nikon has a rectangle with yellow ‘waves’ in it on the digital screen

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scanning – Macro lens suggestions for a Nikon D40? Trying to scan Kodachrome slides with the Nikon ES-1

I am trying to “scan” Kodachrome/Ektachrome slides from the 40’s-60’s. I am considering buying the Nikon ES-1 slide copier. I do not have a macro lens, any suggestions? I have a Nikon D40. I am going into this quite blind, I’m not sure what I am doing but I would like to do a good job preserving these photos by converting them to digital. I will do lots of research, but I am worried my old Nikon D40 isn’t capable of giving me good quality. Do you think it is worth buying a used macro lens and using the ES-1 to do this? I just don’t know if my camera is too obselete to give good quality. It is important that they are as accurate as possible, the colors are beautiful and my grandfather was quite good! I have read that the Nikon 40mm f 2.8 is a good option for my camera, do you think so? I also am unsure of settings I should use and what to use for a consistent light source. Lots of research to do…but any suggestions of help would be so appreciated! Thank you!