Slide Holder for Tamron 90mm Macro

thingiverse

This is a versatile accessory designed to hold 35mm slides made of paper, plastic, or metal, which can be attached to the latest version of the Tamron 90mm macro lens. The three primary components are the ring that securely attaches to the Tamron lens via its hood mount, the extension tube that allows for precise focusing, and the slide holder. Additionally, a diffusion panel is included to ensure even light distribution when using smaller or more intense light sources. I engineered this system to be modular, enabling users to easily swap out different hood mounts and extension tubes to accommodate various macro lenses while utilizing the same slide holders. Currently, however, I only have experience with the Tamron lens, so alternative lens designs are not available at this time. For the slide holder, there are three sizes: one that accommodates paper and 1.5mm plastic mounts, another for 2mm plastic mounts, and a third for 3mm metal mounts typically used in old Argus projectors. The 2mm holder can also work with paper and thinner plastic mounts, but they may be slightly loose within the holder. Two options are available for the extension tube: one with solid walls and another with cutouts to minimize material usage and printing time. I have printed the tube with cutouts and found it to be sturdy enough, as long as intentional force is not applied. However, users in bright environments or using daylight may encounter issues with light flare due to the cutouts. In such cases, a solid extension tube or wrapping black construction paper around the tube can resolve this problem. The extension tube is designed to fit snugly yet not too tightly, allowing for smooth rotation of the slide holder if needed. Paper and plastic slides can be oriented vertically or horizontally within their holders, but metal slide mounts I have modeled are specifically designed for one orientation due to tabs protruding from the top, which disrupt centering. To accommodate differently oriented slides, users can rotate the slide holder. My 3D printer typically achieves an accuracy of ±0.15mm, and the parts have functioned well within this margin, with some slight variations in fit. If you encounter any issues with part compatibility, please let me know.