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Canon RF mount system Best value for money lenses April 2023

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Rainbow lorikeets Canon EOS R5 with RF 100-500mm L 



Canon offers a range of very expensive, high performing lenses to satisfy the most demanding professional and enthusiast amateur requirements. But Canon is also acutely aware that most buyers of their cameras and lenses seek good photo output without having to spend the sort of money which could buy a new motor car.

So they offer some very low cost and several moderately priced bodies and lenses to ensure there is something for everyone.

In this post I look at a selection of lenses which I have owned and used and which I think offer really good value for money. Although most of these lenses are from the budget end of the spectrum each of them is capable of delivering very high quality output if used thoughtfully.

I should say my own predilection is towards products which can deliver good results without the need for extravagant financial outlay. I also often choose subjects which I want to render sharp across the frame with substantial depth of focus. So I do not need super wide aperture lenses which can deliver very shallow depth of focus. Professional sports, wedding and portrait photographers who require soft, out of focus backgrounds do need those wide aperture lenses. They are tools of trade and worth the extra cost.

Primes

1. Star of the show is the smallest, lightest and least expensive lens in the entire Canon RF mount catalogue. This is the 50mm f1.8 STM“nifty fifty”. Although based on a 6 element double gauss design which has been around for over 100 years, the current iteration has a revised optical construction including an aspheric element in the rear group.

There are plenty of online reviews comparing the nifty fifty f1.8  to the 10x more expensive 50mm f1.2 L. The main advantage of the wider aperture model is just that: wider maximum aperture for shallow depth of focus when used wide open.  The expensive lens is also a bit better optically at f1.8-f2.8 with better corner sharpness and smoother bokeh. For the price, it had better be.

But by f4 the little f1.8 lens catches up to deliver resolution equal to that of the f1.2 L lens right across the frame. Don’t believe me ? Check out reviews at Optical Limits online.

The nifty fifty is not weather sealed, lacks IS, uses STM instead of USM focussing, has no switches on the barrel and uses less expensive construction materials than the L lens.

I have found that the 50mm f1.8 focusses quickly and accurately, and from f4 delivers results as good as I have seen from any lens. Even at f1.8 it is good enough for many purposes with resolution falling off only around the periphery.

The only caveat I would make about this lens is that as it does not have a stabiliser, it is best used on a body with in body image stabiliser (IBIS).

2. The RF 35mm f1.8 IS STM Macro was one of the first four lenses released with the original EOS R body in 2018. There are several good reasons for this. Many users regard the 35mm focal length as the most versatile all-rounder. This one is very sharp across the frame right from f1.8. It does have a stabiliser, an AF/MF switch and an IS ON/Off switch. In addition it offers half macro capability with very good image quality at the closest focus distance.

In short this is a very capable and versatile prime lens.

There are two downsides which might be important for some users. First it is a bit slow to focus compared to either the 50mm f1.8 or the 24mm f1.8.  Second, there are no bayonet lugs on the front of the barrel for a lens hood. The little screw-on hood offered by Canon is not a good solution. Fortunately JJC offers an after market petal hood with push-fit mounting ring. This works but should not have been necessary.

In the Tank Art Gallery of New South Wales  Canon R5 with RF 16mm f2.8


Zooms

3. I give top rating for value among the zooms to the RF 100-400mm f5.6-8 IS USM superzoom. Here is an unpretentious, moderately priced zoom which delivers most of the range and capability of the 4x more expensive RF 100-500mm L.  The 100-400 is light, compact and easily handled. It is well made with a very smooth zoom action having just the right amount of drag. There are zoom, focus and adjustment rings on the barrel, together with AF/MF and IS switches and a zoom lock switch. Focus is by USM.  AF is very fast and accurate.

 In the center of the frame I can see very little difference in sharpness or resolution between the 100-400 and the 100-500L.  The L lens is clearly better around the periphery however. The 100-400 can accept Canon’s 1.4x and 2x extenders however on the R5 I find the 1.4x extender provides no advantage over cropping. That might not be the case when cameras with a lower pixel count are used.

The 100-400 works well on either full frame bodies or the R7 or R10 APSC models to which it is well suited.   As a result of the narrow maximum aperture range the 100-400mm is not best suited to indoor sports or situations where we want the background to be rendered softly out of focus.

4. Next up we have the RF 24-105mm f4-7.1 IS STM standard zoom, often bundled with one of the lower level full frame RF mount bodies.

This lens finds its way into the best value list because it is just so versatile. It is light, compact, moderately priced and still does a decent job of delivering high quality photos.

It has two rings on the barrel, a Focus/Control switch and a Stabiliser On/Off switch. Build quality is good, the zoom action smooth and AF fast and accurate.

Optically the 24-105 STM is best at the long end and weakest at the wide end where barrel distortion, peripheral shading and color fringing are very prominent. These problems are mostly correctable either in camera or in post processing but we never see really crisp corners at 24mm. Whether this matters or not will depend on the subject matter and the way we want to deal with it photographically. The lens is more successful in practice than we might expect from technical lens test results.

It can be used effectively indoors at or near the wide end where the aperture is f4. The long end at f7.1 is best reserved for well lit situations, usually outdoors.   This is also a quite effective near-macro lens when set to 105mm where the maximum magnification is about 0.4x with AF.

 5. The RF-S 18-150mm f3.5-6.3 IS STM is one of the standard zooms often bundled with the EOS R7 or R10 APSC crop sensor cameras. There are only three dedicated RF-S lenses at the time of writing with the 18-150mm being easily the best and most versatile.  It is remarkably light and compact for an 8.3x zoom. As with existing EF-M lenses and probably future RF-S lenses the emphasis is on compact size, light weight and practical portability. There are two rings on the barrel but no AF/MF or Stabiliser switches.

The RF-S 18-150mm does everything very well. The zoom action is smooth, AF is fast and accurate, the stabiliser works well and optical quality is very good to excellent at all focal lengths and apertures right across the frame.

The only downside is the somewhat narrow aperture as we zoom out. Indoors f3.5 at the wide end works well but the long end is probably best reserved for outdoors.

Honourable mentions

6.  To keep the price down the RF16mm f2.8 STM lives in the same outer housing as the 50mm f1.8 but of course all the optics and inner workings are unique to the 16mm. Not so long ago ultrawide primes like the Canon EF 14mm f2.8 L were very large, heavy, expensive things with a dome type front element precluding use of ordinary filters or lens protection. Then in 2021 Canon produced this thing like a rabbit out of a hat. Ultrawide, fast, very small, with AF, with a normal filter thread (43mm) and available at a very low price. It almost sounds too good to be true.

So, is it any good ? In a word, yes. Sharpness in a fairly large central area of the frame is very good to excellent right from f2.8. but sharpness drops off dramatically towards the periphery at f2.8. Whether this matters photographically depends on the subject and the way we decide to render it. I have some ultra-wide interiors taken at f2.8 in extremely dark and difficult conditions which present very well. As we close the aperture the periphery of the image improves substantially but the far corners never get really sharp at any aperture. There is also huge barrel distortion, peripheral shading and color fringing in uncorrected Raw files. These issues are mostly but not always entirely correctable in post processing.

An obsessive  lens test purist might dismiss this lens as having too many faults to be useful. If so they would have missed the point of the 16mm f2.8. This lens is designed to be useful, not perfect,  and it fits that bill wonderfully well.

7. Remarkably, Canon offers three full frame ultrawide zooms for the RF mount. The RF 15-30mm f4.5-6.3 IS STM is the most compact, lightest, least ambitious in terms of focal length and aperture range and least expensive of the three. It occupies the same outer housing as the RF 24-105 STM. The RF 15-30mm attracts very little attention from lens reviewers or contributors to user forums presumably because it offers nothing much about which we might get excited. It does however deliver very good image quality at all focal lengths and apertures ( even though these are restricted in range ) right across the frame. It is a working lens for the rest of us. Not exciting but it does the job quietly and competently.

8. The RF 85mm f2 IS STM Macro is another quiet achiever which has a rather low profile in the RF lens catalogue. Yet it is superbly sharp across the frame right from f2 with a very low level of faults and aberrations. It does have a stabiliser, AF/MF switch, Stabiliser ON/Off switch and two rings. In addition it works very well as a half macro lens with excellent sharpness at the closest focus distance.

The only negative feature which I found in use is a slow-ish AF speed compared to most other RF lenses.

9. The RF 24-240mm f4-6.3 IS USM 10x superzoom for full frame RF mount cameras gets into this list on the basis of its versatility. It covers  the greatest focal length range of any RF mount lens. This could make it ideal for situations when we are out and about with no desire to change lenses. Holidays, travel and urban walkabouts spring to mind. Although mainly structural polycarbonate,  build quality appears to be very good. The barrel has two rings. The double extension zoom action is very smooth with no noticeable free play in the barrels. There is a zoom lock switch, Focus/Control switch and an AF/MF switch on the barrel. USM focus is utilised for very fast AF speed. The stabiliser is very effective.

Optically the lens is excellent from 35-150mm. Towards the wide end there is massive barrel distortion, peripheral darkening and color fringing. These defects are mostly correctable in post processing however I do find myself spending more time correcting optical imperfections with this lens than most others in the RF mount catalogue. From 150mm towards the long end, optical quality degrades with some loss of contrast and peripheral softness.

In use the lens is quite a bit larger than standard zooms so we will be noticed using it when out and about.

10. Last and by no means least on this list I offer the RF 100-500mm f4.5-7.1 L IS USM tele-zoom. This is by far the largest, heaviest and most expensive lens in this little round-up. I include it because it is absolutely excellent in every way. Optically, mechanically, electronically, the lot. This might be the most expensive lens many non-professional photographers ever buy but they will never regret doing so. I have been very impressed by the results which can be achieved with this lens on the EOS R5. There are plenty of enthusiasts photographing sport, wildlife, birds and the like who will be very happy with this lens and will probably keep it for many years of use. It is still good value because it is just so darn good.

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