The tolerance of the sliding carriers in the film housing is not ideal. There's room for some slight tilting. I fixed this by adding bits of thin, dense foam to the slot in the film holder where the carriers sit. That eliminates any play and keeps the carriers level. One slight annoyance with my personal gear is that I can't make the extension short enough to entirely fill the frame using my full frame camera with the 50mm macro. At the shortest extension, the lens can provide only about 0.9x magnification instead of 1x, meaning the final pixel resolution of the image is slightly less than optimal. That's a result of the design of the lens housing, so it will likely be different with different lenses. Not a big deal, really. I have the option of doing that, but I prefer correcting the problem. One reason why I like products of this type is that they don't require any special support setup. I can have the camera sitting normally on a desk, using window light or a small artificial light source. It's good ergonomics with very little setup or teardown needed. Complete Accessories】The Slide scanner set supplied 1x barrel, 5x adapters 1x 35mm film holder(Negative holder), 1x 35mm Slide holder(Positive holder), 1x LED Light with 42 beads and Photos- Works Standalone, No Computer/other camera accessories,film scanner required.

LED light features 42 built-in ultra-bright LEDs.The color difference can be effectively reduced for the LED's 95+ color rendering index and 6500K color temperature.It is recommended to select the image stabilizer switch of the lens to "OFF" when using the FDA-K1.

Thanks for posting this. The link says it is currently unavailable, but I may look for this and give it a try. The extensions and lens ring adapters are all metal. The film housing is plastic, as are the film and slide carriers. The plastic seems okay for the purpose, and the carriers are easy enough to work with. The light diffuser is good, but too close to the film plane IMO. It's close enough that dust on the diffuser might be inadvertently brought into focus, so it could need frequent cleaning. This appears to be the case with the ES-2 as well.The spring tension is loose so the strip rail doesn't stay square with the rest of the frame, requires frequent adjustment. (If you take it apart, which I suggest anyway (see below), you can bend the springs a bit to get more tension). The brightness can be adjusted through the remote control on the connection line. There are 10 levels that can be adjusted, and higher brightness can be selected as needed. I did do that with one Kodachrome slide, a window lit portrait which was half in shadow. I could lift the shadow up to almost the same brightness as the lit side, but you could tell from the “grain” that it was not quite right. That was probably an extreme example though - I have kept the scan but not brightened up all the way. It is recommended to select the image stabilizer switch of the lens to "OFF" when using the FDA-S1.