DX format lenses can be mounted but may result in vignetting when the full Micro Four Thirds format is used, depending on the lens. Lens Compatibility: Any full-frame (36 mm x 24 mm format) SLR lens with the appropriate mount can be used. Here's the full lens compatibility statement further down in the press release: The Speed Booster ULTRA m43 will also work extremely well with many DX and APS-C format lenses provided the image circle of the lens is large enough. However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is almost perfectly corrected for use with all fullframe SLR lenses regardless of aperture. It uses the phrase "DX and APS-C format lenses" several times. You might also find the press release from Metabones announcing the Speed Booster ULTRA 0.71x M43 with Autofocus to be helpful. The resulting 19.84 mm diagonal is very close to 26.9 x 0.71 = 19.1 mm. With a 17.3 mm width, only the center 9.73 mm of the sensor's 13 mm height would be used for 16:9 video. The video comment seems to assume one is shooting in 16:9 format and thus not using the extreme corners of the 4:3 aspect ratio sensor. Some EF-S and DX lenses² may not have enough coverage of the entire image circle for stills after widening by 0.71x (but video will have enough coverage). They still point out that there may be issues with image circle coverage using APS-C lenses with the EF mount.īelow are two notes of particular interest from the Metabones product page:ĮF-S lenses require modification to fit or may remain incompatible even after modification (but third-party DX lenses can be used without modification)Įven if the EF-S lens is modified to fit the EF mount of the adapter, there may be mechanical clearance issues with some EF-S lenses that have rear elements that protrude further out the back of the lens flange than EF lenses do. It does not provide full sensor coverage with third party APS-C lenses in the Canon EF mount that only cast an APS-C size image circle.¹ The apparent reason Metabones "recommends" the Metabones Ultra 0.71x EF to MFT, rather than the Metabones XL 0.64x EF to MFT, for APS-C lenses is because the vignetting issues will be much less severe with the 0.71X focal reduction than with the 0.64X reduction. Only FF Canon EF lenses or equivalent third party lenses will project an image circle large enough to cover the ♔/3 sensor when used with the Metabones Ultra 0.71x EF to MFT. T Speed Booster Ultra 0.71x Adapter for Canon Full-Frame EF-Mount Lens to Micro Four Thirds-Mount Camera. Other "APS-C only" lenses in the EF mount will attach, but the other caveats regarding using lenses with an APS-C size image circle with this adapter remain valid. Unmodified EF-S mount lenses will not physically attach to this adapter. If one reads the official Metabones product page for the Ultra 0.71x EF to MFT, one sees that there are several caveats to using an APS-C lens with it, and that it is marginally usable for recording 16:9 video, but not necessarily 4:3 stills, with APS-C lenses. And you have to define the source with “Source: ” (working link).Metabones Ultra 0.71x EF to MFT is for APS-Cīoth the Metabones XL 0.64x EF to MFT and the Metabones Ultra 0.71x EF to MFT are primarily intended to be used with full frame EF lenses. You cannot copy more than 20 words from any of our posts. Here is the definition of the word “rumor” according to Merriam Webster dictionary:Įtymology: Middle English rumour, from Anglo-French, from Latin rumor clamor, gossip akin to Old English rēon to lament, Sanskrit rauti he roarsġ: talk or opinion widely disseminated with no discernible sourceĢ: a statement or report current without known authority for its truthģ archaic : talk or report of a notable person or eventĬontent Copyright If you want to use any image from this website you have to ask for permission. All trademarks and brands belong to their respective owners. Please visit their official websites by typing the specific brand name and adding. Disclaimer: SonyAlphaRumors has no affiliation with any of the equipment manufacturers mentioned on this site.
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