I bought a refurbished Canon T7i with the intention of modifying it (removing the IR cut filter) to make it suitable for nebula gas emission astrophotography. I tried buying all these external astronomik special filters (e.g. UHC EOS APS-C Clip filter, and CLS EOS APS-C Clip Filter) to filter out city lights - this helped a lot, but never compared to the top notch photos on the internet. I've got the itch for full spectrum! That was it. I set out on the scary attempt at removing the built-in IR cut filter (voiding my warranty):
I roughly followed the guide by Gary Honis on:
- http://dslrmodifications.com/rebelmod450d1.html
- https://www.youtube.com/watch?v=7huA4R9rXrQ
Guide deviations for T7i
This was reasonably close to the T4i guides.
- I found that there was screw hidden under the T7i logo instead of needing to peel back the rubber grommet material as described in the guide(it's permanently attached - so don't do that). There were several other screws that didn't quite match the guides. I deduced it carefully, and recorded my whole process. I may publish a written/video guide later.
- I installed the Astonomik MC-Klarglas EOS1000D filter. It was a tight squeeze and fractured the edges a little bit as I snapped the metal housing back on it - glad it was crack resistant (at least in my case).
- There were a lot more connectors, and using the toothpick was great for gently handling the connectors. It's definitely an art to manipulate. I damaged one of the black connectors... even with a toothpick!!! Sheesh, fragile hardware. (I later touched it with a soldering iron momentarily to reseat it - slide board discoloration)
Now to test it on some nebula tomorrow!
First moment firing it up. You can see infrared light from TV remote in the camera, but not on the iPhone!
Lots more connectors
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