Differences between the EF 70-300mm "L" IS USM (2010) and the EF 70-300mm "II" IS USM (2016)....
- The "II" has excellent image quality, but the "L" is slightly sharper throughout the focal length range.
- The "L" has very slight chromatic aberration at 70mm and little to none at 300mm. The "II" has the opposite, none at 70mm, a very small amount of CA at 300mm.
- The "L" can optionally be fitted with a tripod mounting ring. The "II" cannot.
- The "II" uses Canon's new "Nano USM" auto focus drive, while the "L" uses standard USM.
- The "II" is the first Canon lens to have that unique LCD focus scale, which can be programmed to display some other info.
- Canon doesn't list it, but the 70-300mm "L" is
physically compatible with Canon 1.4X and 2X extenders, while the "II" is not. Note: With a 1.4X the lens is effective f/8, which will only be able to autofocus on select Canon cameras with limited AF points. With a 2X the lens will be effective f/11, which cannot autofocus on any of the Canon DSLRs, but may be able to do so if adapted for use on one of the R-series mirrorless cameras.
Compared to the EF 100-400mm L IS USM "II", besides the obvious difference in focal length ranges....
- The EF 100-400mm "II" is slightly sharper than either of these 70-300s at all focal lengths they share. The
least difference is at 300mm.
- The 100-400mm uses one fluorite element and one super UD element in it's optical formula. Both the 70-300 "II" and "L" use two UD elements and no fluorite.
- The EF 100-400mm "II" comes with a tripod mounting ring, which is only partially removable.
- The EF 100-400mm "II" is considerably bigger and heavier: It's 1700 grams, w/hood. 70-300 "L" is 1125 grams and the 70-300 "II" is 759 grams.
- 100-400mm "II" uses 77mm filters, while both 70-300 "II" and "L" use 67mm (the original 70-300mm IS USM uses 58mm).
- EF 100-400mm "II" focuses closer and renders higher magnification: 0.31X versus the "II's" 0.25X and the "L's" 0.21X.
- EF 100-400mm "II" variable aperture starts out at f/4.5 (at 100mm), while both 70-300s are 1/3 stop faster at f/4 at 70mm.
- On the other hand, the 100-400 "II" maintains f/5 aperture through 310mm. The 70-300 "II" does so thru 175mm and the 70-300 "L" thru 225mm.
- Image Stabilization on all three lenses is rated to be up to four stops effective. The 100-400 "II" has IS Mode 1, Mode 2 (panning) and Mode 3 (instant). The 70-300 "L" has Mode 1 and Mode 2. The 70-300mm "II" has no user-selectable IS modes.
- None of these lenses are "IF" or "internal focusing". All three extend in length as they're focused closer.
- All three have zoom locks. I think the locks on both 70-300s are simple off/on and only serve for storage or carrying of the lens in the most retracted position. The 100-400 "II" instead uses a zoom tension adjustment ring that's variable and works throughout the zoom range.
EF 70-300mm "II" IS USM... $449 ($100 off, sale ends June 1)
- Canon ET-74B lens hood... $45 (not incl. w/lens)
EF 70-300mm "L" IS USM... $1359 (hood incl.)
- Canon Tripod Ring "C" for 70-300L and 28-300L... $165
EF 100-400mm "II" IS USM... $1799 ($400 off, sale ends June 1, hood & tripod ring incl.)
- Hejnar Photo, Kirk Photo, RRS replacement tripod foot... $70 to $90. (Recommended for Arca quick release use.)
Compare image quality between 70-300mm "II" and 70-300mm "L":
https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1077&Camera=979&Sample=0&FLI=4&API=1&LensComp=738&CameraComp=979&SampleComp=0&FLIComp=5&APIComp=1Compare image quality between 70-300mm "II" and 100-400mm "II":
https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1077&Camera=979&Sample=0&FLI=4&API=1&LensComp=972&CameraComp=979&SampleComp=0&FLIComp=3&APIComp=1Detailed review of EF 70-300mm "II" IS USM:
https://www.the-digital-picture.com/Reviews/Canon-EF-70-300mm-f-4-5.6-IS-II-USM-Lens.aspxDetailed review of EF 70-300mm "L" IS USM:
https://www.the-digital-picture.com/Reviews/Canon-EF-70-300mm-f-4-5.6-IS-L-USM-Lens-Review.aspxFull review of EF 100-400mm "II" IS USM:
https://www.the-digital-picture.com/Reviews/Canon-EF-100-400mm-f-4.5-5.6-L-IS-II-USM-Lens.aspx