佳能敢動老虎 全新佳能 rf 28-70mm f2.8 鏡頭上手評測

Hi, I'm Gordon from CameraLabs This is my first looks review of the Canon RF 28-70mm f2.8 IS STM a mid-range general purpose zoom for their full frame EOS R mirrorless cameras Like other RF lenses, it only works on EOS R bodies plus some cinema models and it's not compatible with EF DSLRs or EOS M mirrorless cameras I spent some time with a shooting sample for this initial review which means the image quality should be the same as final production models I tested it using an EOS R8 as this is an ideal combination Launched in September 2024 at a price of around £1250 $ price in description below The 28-70mm provides a more affordable option for those who want to walk around zoom with an f2.8 aperture but who can't stretch to pricier, not to mention heftier models that zoom wider to 24mm It's a rare mid-range RF option named as an upgrade from the basic kit zooms and while the price does make it the most expensive non-L lens in the RF series to date it does remain a lot cheaper than the other bright RF zooms For example, Canon's RF 24-70mm f2.8 L is comfortably larger almost double the weight not to mention roughly twice the price at around $2400 or £ Now obviously the 24-70mm f2.8 is also an L lens with superior build but you get the idea It's also not Canon's first lens to employ the 28-70mm range in order to offer something a bit different Most recently in 2018 with the enormous 28-70mm f2.8 seen here on the right which helped launch the EOS R system This beast of a lens weighs almost 1.5kg and costs around 3 grand Again, there's the L factor to take into consideration but you're basically looking at the physical impact of wanting the same zoom range but with an aperture just one stop faster So think about that next time you want a brighter lens At this point, I'd also be remiss if I didn't mention that Sigma has had a 28-70mm f2.8 for three years now and Tamron a 28-70mm f2.8 for six years both at around two-thirds the price of the new Canon But that's an academic conversation since neither are currently available in the RF mount So if you own an EOS R camera you're still pretty much looking to Canon alone for native full-frame lenses with autofocus So with the scene set let's take a look around the new lens Closest to the mount are a pair of switches the first setting the lens to autofocus or configuring the outer ring for custom control or manual focus Below this you can switch the optical stabilizer on or off Next comes the ribbed zoom ring and as a retracting design this must first be twisted to the 28mm position to shoot with the lens The barrel then gradually extends further as you zoom through the labelled focal lengths of 35mm, 50mm and 70mm Then to store the lens in its shortest length just zoom back to 28mm and keep twisting Finally at the end of the barrel is a smooth spinning ring which as mentioned earlier can adjust manual focus or act as a custom control ring At the end of the barrel is a 67mm filter thread and a bayonet for an optional lens hood Although despite the fairly high price Canon has continued its unpopular tradition of not including a hood with non-L lenses So you'll need to pay extra for the EW73D hood About 35 bucks for an official one Or about a tenner for a third party model That said, it does at least break with another Canon tradition Despite not being an L lens The 28-72.8 is dust and moisture resistant Including a rubber grommet at the mount As well as seals around the rings and switches OK, I'll now demo the range using the R8's movie mode Starting at a mild wide 28 That'll capture most buildings or landscapes Before reaching a short telephoto 70mm For portraits or details It makes for an ideal range for events Canon includes Optical Image Stabilization Or IS for short Claiming up to 5.5 stops of compensation For bodies without IBIS Like the R8 I used for testing Or up to 7.5 stops for those with IBIS Like say the R6 II Focusing is courtesy of STM motors Which operate quickly and quietly You can see the lens refocusing on the R8 here At 28mm f2.8 between near and far Note the closest focusing distance at 28mm is 27cm And now for the lens at 70mm f2.8 Where you can see the focusing remains very quick and accurate Note the closest focusing distance at 70mm is 35cm Let's try that last test again at 70mm f2.8 for video With a single AF error in the middle Here you can see the lens can deliver smooth And accurate transitions between near and far And also note the new EOS C80 cinema camera in the background I've got a separate review of that if you're interested How about focusing on people Here's the lens at 28mm f2.8 using face detection And the whole AF area on the EOS R8 Now while 28mm is not wide enough for handheld vlogging It's great for presenting pieces to camera from a tripod Where you want more of the surroundings If you're after more separation from the background Here's how the coverage looks at 50mm f2.8 Obviously you'll enjoy greater background blur With a brighter prime lens Or indeed the 28-70 f2 if you can afford it But at 2.8 you're still getting some decent bokeh And finally with the lens at the long end At 70mm f2.8 where the lens becomes a short telephoto Ideal for closer range portraiture Or more concentrated pieces to camera This is going to be the maximum blurring you'll achieve With this lens and a subject at this kind of distance And I'll show you a still portrait later But first a quick look at focus breathing Without body compensation enabled Starting at 28mm and manually focusing from infinity To the closest distance Where you'll see the coverage widen And next at 70mm where the view widens again As I focus closer But not quite by as much as at 28mm Note that some bodies can reduce the effect of breathing With digital compensation Albeit with a crop to the coverage Speaking of digital compensation Like most modern lenses The RF 28-70mm is designed to use a profile To correct for geometric distortion This is applied automatically for JPEGs in camera With that option greyed out in the menus But if you're shooting in RAW You will need to ensure that your converter Is updated for this lens Or you're going to see the distortion Expect barreling at the wide end And some pin cushion at the long end Without the profile applied OK now for a distant quality test Starting at 28mm f2.8 And due to my limited time with the lens so far I've had to swap my usual view of Brighton Pier For this office building But I have composed it so that details Still run right into the corners Taking a closer look in the middle Shows sharp details out of the gate And closing the aperture down Doesn't bring any significant benefits Returning to f2.8 and moving into the corners Maintains most of the sharpness With only mild improvements to both it and vignetting As you close the aperture down Next for the view at 50mm f2.8 And taking a close look in the middle Again shows a good degree of detail wide open With little to no benefit to closing the aperture down Moving into the corner of the f2.8 sample Again shows the details are mostly maintained With only the mildest softening As you close the aperture The details do become a tad crisper But I'd certainly be happy using the larger values if necessary And finally at 70mm f2.8 Where again taking a close look in the middle Shows decent detail And again no real benefit to closing the aperture further Moving into the corner of the f2.8 sample at 70mm Reveals very minor softening of ultimate detail But this becomes crisper as you close the aperture down a little So like most new lenses The 28-70mm is respectably sharp across the frame There are some benefits to closing the aperture a stop or two If you'd like the best quality into the corners But you certainly wouldn't look at those f2.8 samples And consider them compromised Next for a quick portrait test at 70mm f2.8 Showing the potential as a short telephoto Here the background understandably isn't going to be as blurred As you'd manage with a longer or brighter lens But there's still some separation And if you take a closer look at the subject The sharp details too If you're really into portraits Or prefer greater background blur on close-ups I'd consider the RF 85mm f2.8 But as a compact event lens The 28-70mm will be fine for many of us For a closer look at the bokeh quality Here's a quick test taken at 70mm f2.8 From the closest focusing distance Looking closer at the bokeh blobs There's very faint outlining and onion ringing visible Placing it roughly between the more obvious artifacts Of cheaper lenses And the cleaner blobs of more expensive ones As I close the aperture down You'll subtly see the shape of the diaphragm system But overall the blobs remain mostly circular So again I'd say a step up from entry level lenses But not as nice as the higher end ones Which now brings me to my verdict so far During which I'll show you some samples taken with the lens Canon's RF 28-70mm f2.8 Delivers a step up over entry level kit zooms In build, optical quality and potential bokeh Without the cost or indeed the heft of higher end L lenses This makes it an ideal option For smaller mid-range full frame bodies Like the EOS R8 But this mid-range positioning Also makes it the most expensive non-L lens In the RF series to date Uncomfortably approaching the price of the 24-105mm f4 L Which for only a little extra Gives you a broader zoom range L build quality and a lens hood The 28-70mm f2.8 of course counters With its brighter f2.8 aperture A slightly lower price point And a barrel that's smaller and lighter Physically this makes it a better match For the smaller bodies in the range But I'd still say the pricing is a bit on the high side Ultimately I like the concept of a 28-70mm f2.8 Sacrificing some of the wide end To come in cheaper than a 24-70mm f2.8 But while Canon's costs roughly half that Of the 24-70mm f2.8 L I'd have been happier still Had it been closer to a grand in price Especially as Sigma and Tamron have done it for around 800 But as we all know that's an academic argument for now As neither of them make native full frame lenses For Canon's EOS R system At least not yet If you're after a more affordable 2.8 zoom Consider adapting an older EF model Whether made by Sigma, Tamron or indeed Canon themselves With some great prices on used models Check mpb.com using the link in the description for some ideas But none of these EF lenses will be as small or light As the new RF 28-70mm f2.8 And most will be slower or noisier when focusing And to be fair many of us have been asking For mid range Canon RF lenses And with its bright aperture, weather sealing and price point The 28-70mm f2.8 is exactly that Slotting between entry level and high end options So the choice is yours I'd love to hear what you think in the comments And as always if you find what I do useful Please do consider giving this video a like And my channel a follow is always very much appreciated Which only leaves me to thank you for watching And bid you a fond farewell I'll see you next time, bye bye