So I was thinking about that tiny camera sensor in my last shot, and remembered I had both RF and EF extension tubes, so I put them ALL on, totally 99mm of extension (and all electronics worked), and re-shot the sensor above. Instead of the 2x magnification I got before, I now yielded 3.8x magnification (measuring pixel dimensions of the sensor, which is 7.5mm wide.) Interestingly, though, this is significantly greater magnification than I should get with that extension looking at extension tube calculators, but I am definitely getting it. (Width of frame went from around 18.2mm at 2:1, which is actually 1.97:1, to 9.4mm, or 3.84:1. By all the ET calculators I should only be getting around 3:1...but I'm guessing this difference is due to the shorter actual focal length at 2:1 focus setting, which, if there calcs hold, would actually be 54mm)
While sharpness falls off heavily at the edges due to the massive extension, it's still sharp enough to see individual photosites, which are 4.6 microns wide.
Full shot - R5 with Laowa 100mm f/2.8 Macro, set at 2x magnification and with 99mm of extension, 3.8x magnification:
So I was thinking about that tiny camera sensor in my last shot, and remembered I had both RF and EF extension tubes, so I put them ALL on, totally 99mm of extension (and all electronics worked), and re-shot the sensor above. Instead of the 2x magnification I got before, I now yielded 3.8x magnification (measuring pixel dimensions of the sensor, which is 7.5mm wide.) Interestingly, though, this is significantly greater magnification than I should get with that extension looking at extension tube calculators, but I am definitely getting it. (Width of frame went from around 18.2mm at 2:1, which is actually 1.97:1, to 9.4mm)
While sharpness falls off heavily at the edges due to the massive extension, it's still sharp enough to see individual photosites, which are 4.6 microns wide.
Full shot - R5 with Laowa 100mm f/2.8 Macro, set at 2x magnification and with 99mm of extension, 3.8x magnification:
So I was thinking about that tiny camera sensor in my last shot, and remembered I had both RF and EF extension tubes, so I put them ALL on, totally 99mm of extension (and all electronics worked), and re-shot the sensor above. Instead of the 2x magnification I got before, I now yielded 3.8x magnification (measuring pixel dimensions of the sensor, which is 7.5mm wide.) Interestingly, though, this is significantly greater magnification than I should get with that extension looking at extension tube calculators, but I am definitely getting it.
While sharpness falls off heavily at the edges due to the massive extension, it's still sharp enough to see individual photosites, which are 4.1 microns wide.
Full shot - R5 with Laowa 100mm f/2.8 Macro, set at 2x magnification and with 99mm of extension, 3.9x magnification:
So I was thinking about that tiny camera sensor in my last shot, and remembered I had both RF and EF extension tubes, so I put them ALL on, totally 99mm of extension (and all electronics worked), and re-shot the sensor above. Instead of the 2x magnification I got before, I now yielded 3.9x magnification (measuring pixel dimensions of the sensor, which is 7.32mm wide.
While sharpness falls off heavily at the edges due to the massive extension, it's still sharp enough to see individual photosites, which are 4.1 microns wide.
Full shot - R5 with Laowa 100mm f/2.8 Macro, set at 2x magnification and with 99mm of extension, 3.9x magnification:
100% crop showing photosites.
Feb 19, 2022 at 08:46 PM
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