Metabones Canon EF to BMPCC4K T Speed Booster ULTRA 0.71x
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View warranty terms and conditionsThe Metabones Canon EF to BMPCC4K T Speed Booster ULTRA 0.71x is a lens adapter specifically designed to mount Canon EF lenses on Blackmagic Design cameras with Micro Four Thirds (M43) mount, such as the BMPCC4K. This speed booster not only adapts the mount but also enhances the optical performance of the lens: it increases the maximum aperture by one stop (up to f/0.9 in the best case), increases MTF (sharpness and contrast), and widens the angle of view by a factor of 0.71x, making the lens more wide-angle. All this is thanks to a patented optical design of 6 elements in 4 groups developed by Caldwell Photographic in the USA.
This second-hand accessory has been inspected and comes with the Camera Market warranty (6, 12, or 24 months), giving you peace of mind in your purchase. It is ideal for videographers looking to maximize brightness and image quality on their BMPCC4K without giving up the versatility of Canon EF lenses. Note that, being a product specific to the BMPCC4K, it is not compatible with other M43 cameras in a standard way. For detailed technical specifications, refer to the manufacturer's datasheet.
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The Metabones Canon EF to BMPCC4K T Speed Booster ULTRA 0.71x is a lens adapter specifically designed to mount Canon EF lenses on Blackmagic Design cameras with Micro Four Thirds (M43) mount, such as the BMPCC4K. This speed booster not only adapts the mount but also enhances the optical performance of the lens: it increases the maximum aperture by one stop (up to f/0.9 in the best case), increases MTF (sharpness and contrast), and widens the angle of view by a factor of 0.71x, making the lens more wide-angle. All this is thanks to a patented optical design of 6 elements in 4 groups developed by Caldwell Photographic in the USA.
This second-hand accessory has been inspected and comes with the Camera Market warranty (6, 12, or 24 months), giving you peace of mind in your purchase. It is ideal for videographers looking to maximize brightness and image quality on their BMPCC4K without giving up the versatility of Canon EF lenses. Note that, being a product specific to the BMPCC4K, it is not compatible with other M43 cameras in a standard way. For detailed technical specifications, refer to the manufacturer's datasheet.
- Increases maximum aperture by 1 stop (up to f/0.9)
- Increases MTF (sharpness and contrast)
- Makes the lens 0.71x more wide-angle
- Patented optical design of 6 elements/4 groups by Caldwell Photographic
- Specific for Blackmagic Design BMPCC4K (M43 mount)
- Includes Camera Market warranty (6/12/24 months) and technical inspection
Is it compatible with any Micro Four Thirds camera?
No, this speed booster is specifically designed for the Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K). Although the mount is M43, the optical design and fit are optimized for that camera, so its use on other M43 cameras is not recommended.
What advantages does the 0.71x factor provide?
The 0.71x factor makes the lens more wide-angle, meaning it reduces the effective focal length. For example, a 50mm lens would behave like a 35.5mm. Additionally, by concentrating light, it increases the effective aperture by one stop, improving performance in low-light conditions.
Does it affect image quality?
Yes, positively. The patented optical design by Caldwell Photographic increases MTF (modulation transfer), which translates to greater sharpness and contrast in the image. It is a notable improvement compared to a simple adapter without optical elements.
What does the Camera Market warranty include?
This second-hand product has been inspected and is covered by the Camera Market warranty, which you can choose between 6, 12, or 24 months. This protects you against possible malfunctions, offering you a safe purchase.
Is it compatible with any Micro Four Thirds camera?
No, this speed booster is specifically designed for the Blackmagic Design Pocket Cinema Camera 4K (BMPCC4K). Although the mount is M43, the optical design and fit are optimized for that camera, so its use on other M43 cameras is not recommended.
What advantages does the 0.71x factor provide?
The 0.71x factor makes the lens more wide-angle, meaning it reduces the effective focal length. For example, a 50mm lens would behave like a 35.5mm. Additionally, by concentrating light, it increases the effective aperture by one stop, improving performance in low-light conditions.
Does it affect image quality?
Yes, positively. The patented optical design by Caldwell Photographic increases MTF (modulation transfer), which translates to greater sharpness and contrast in the image. It is a notable improvement compared to a simple adapter without optical elements.
What does the Camera Market warranty include?
This second-hand product has been inspected and is covered by the Camera Market warranty, which you can choose between 6, 12, or 24 months. This protects you against possible malfunctions, offering you a safe purchase.
Full condition scale
Each unit is inspected at 28 points and graded honestly. Here's how we translate each level so you know what to expect:
Barely any signs of use. Almost flawless aesthetics and perfect operation.
Light marks from normal use. Optically clean and fully functional.
Visible signs of use (scuffs, marks, brassing). Works perfectly.
Not guaranteed for use: sold for parts or repair.
Why buy used?
Depreciation is already absorbed: the same gear for much less than new.
Many classics and discontinued gems only exist today on the used market.
28-point inspection and 6-month warranty included on every unit.
Extending the life of a camera avoids manufacturing and transporting a new one.
