>>2905824If it's all been cold stored, just shoot as normal tbhfambly.
Normal for me is a third of a stop over on slides though; the brighter slides are easier to scan. 2/3rds like other anon said might just roast them.
Any colour negs in there though, just roast away. Make your base exposure a stop over.
>pic related is 1987 expired Fuji 100D slide film (forerunner to provia)<table class="exif" id="exif1471555807167"><tr><td colspan="2">
Camera-Specific Properties:</td></tr><tr><td colspan="2">
</td></tr><tr><td>Equipment Make</td><td>Canon</td></tr><tr><td>Camera Model</td><td>Canon EOS 550D</td></tr><tr><td>Camera Software</td><td>GIMP 2.8.6</td></tr><tr><td colspan="2">
</td></tr><tr><td colspan="2">
Image-Specific Properties:</td></tr><tr><td colspan="2">
</td></tr><tr><td>Horizontal Resolution</td><td>72 dpi</td></tr><tr><td>Vertical Resolution</td><td>72 dpi</td></tr><tr><td>Comment</td><td>
</td></tr><tr><td>Projection</td><td>Rectilinear (0)
</td></tr><tr><td>FOV</td><td>9 x 6
</td></tr><tr><td>Ev</td><td>13.55</td></tr><tr><td>Color Space Information</td><td>sRGB</td></tr><tr><td colspan="2">
</td></tr></table>