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I've never used Canon myself, but some lenses either have an inaccessible aperture lever, or fully electronic controls. The advice I've usually seen is to set the aperture from the camera while the lens is still connected, press the depth of field preview button (so the camera sets the aperture to the desired value), and simultaneously remove the lens from the camera - here's a video showing the process: https://www.youtube.com/watch?v=y1ZuK_dDweg
Nice! Did you set the aperture from the camera before removing and reversing the lens?
I don't have any experience with mirrorless cameras, but have heard that some manufacturers have moved towards completely electronic linkages between the lens and camera body, even for mirrored DSLRs. It might be possible to fix the aperture before inverting the lens, but front surface macro adapters (or extension tubes, as another person commented) are still a viable option.
Indeed - I'd agree that they're one of the best solutions, especially since they don't introduce another layer of glass between the subject and the sensor, with the potential issues that may arise. Do yours provide electronic connections between the camera and the lens, or are they completely manual?
Nice...will check it out!
Thank you! It's amazing the results you can get from using very techniques :)
Reversed-Lens & Cellphone M...View Instructable »
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Awesome instructable! Trying to get started with ESP8266 modules at the moment, so I'll try it out. Regarding the dual capacitors, they definitely help ensure a cleaner DC output, especially by "filtering" any fluctuations in the supply voltage.
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Awesome! Love the circuit - its a quick alternative to coil winding. Just one note to those interested in building: the pinout on the second page seems to have one of the inputs to the first gate switched with pin 3, which is labelled as "NC" (not - connected),instead of pin 2....just something to keep in mind.Thanks again for sharing!
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