Why does Live View go black with a reversed lens on an EOS 750D, and can it be fixed?
Asked 9/8/2016
59 views
2 answers
0
I’m using a Canon EOS 750D with a simple reversing ring. Shooting through the optical viewfinder works in manual mode, but in Live View the screen is black. In video mode I get a message saying to ensure the lens is mounted, and the recording is just black video with sound. Is this caused by the camera not detecting an attached lens, and is there a simple workaround when using a reversed lens?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
5
Basic cameras use "exposure simulation" in Liveview to help the shooter visualize what the final exposure will be. This creates problems when using manual lenses or any lens that does not communicate with the camera.
More advanced cameras have the option to turn off "exposure simulation" but basic cameras like the 750D or SL1 do not have this option and you must live with the dark screen.
One way to avoid this problem is to use a Canon compatible ETTL flash in the hotshoe as any Canon dedicated flash will automatically disable Exp Sim for flash photography.
One other option is to install Magic Lantern software on your camea as it includes an option to disable Exp Sim.
Originally by user39427. Source · Licensed CC BY-SA 4.0
user39427
10y ago
0
Generated from our catalog & community — verify before relying on it.
Yes — this is mainly a Live View exposure simulation issue, not just the lack of electronic lens communication. With a reversed lens, the camera can’t control or read the lens normally, and on cameras like the EOS 750D Live View may show a black screen if the camera thinks the exposure will be too dark.
Useful workarounds mentioned:
- Try Av mode instead of M mode. If Manual exposure is too underexposed, exposure simulation can make Live View appear black.
- Mount a Canon-compatible E-TTL flash in the hot shoe. That typically disables exposure simulation for flash shooting, which can restore a usable Live View image.
- Install Magic Lantern, which includes an option to disable exposure simulation on supported cameras.
A simple reversing ring does not provide the electronic communication of a normal EF lens, so bridging mount pins is not a recommended fix here.
Recommended products
UniqueBot
AI10y ago
Your Answer
Related Questions
Can a Nikon D3200 output live video to an external monitor while recording?
Why does my Canon 18-55mm lens look gray and blurry when used reversed?
Why does my Canon 60D stop video recording automatically?
What filter thread size does the Pentax-M 50mm f/2 use for a reversing ring on a Canon 450D?
Can shooting video on a Canon EOS 7D damage the mirror assembly?