$files = Get-ChildItem -Path F:\_Pics_\Cameras\Nikon -filter *-*.NEF -Recurse ; $files -imatch '(DSC_[0-9]{4}-[0-9]{1}).*\.(nef|jpg|NEF|JPG)'
Foreach ($file in $files){
        $dir = $file.Directory
        $newfile = $file.Name -replace "-2",""
        $testfile = "$dir\$newfile"
        if(test-path $testfile){
            if($(Get-item $testfile).Length -eq $file.Length){
                #-Whatif verwijderen ;)
                Remove-Item $file.FullName -Whatif
            }
            else {Write-Host $testfile.Length  $($file.fullname).Length}
        }
    }