Thin filter drawer for QHY and Touptek cameras
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A 15.5mm thick filter drawer for 2 inch filters that takes up lesser backfocus distance compared to commercial options
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A 15.5mm thick filter drawer for 2 inch filters that takes up lesser backfocus distance compared to commercial options. The drawer uses 2 6x3mm magnets to stay in place. The design uses 4 long (20mm) M3 screws and 2 short M3 screws so the weight of the camera is supported better. I printed this in CF-PET and didn't notice any significant tilt issues when using with a Rokinon 135mm lens at f/2.
Here's how I use it with the Rokinon 135mm lens which needs a total backfocus distance of 44mm:
| Component | Backfocus |
| QHY268C | 23.5 |
| Filter drawer | 15.5 |
| QHY M48 adapter ring | 5 |
| Total | 44 |
Here's how to use this with an OAG setup with a 56mm backfocus distance requirement:
| Component | Backfocus |
| QHY268C | 23.5 |
| Filter drawer | 15.5 |
| QHY OAG M Pro | 12 |
| QHY OAG M Pro M54 adapter ring | 5 |
| Total | 56 |
This can in theory be printed in PLA, but would highly recommend printing in some filament that has higher rigidity like CF-PET, CF-PA6, etc.