A reader recently commented on my ‘BIG ZOOMS Bridge Camera vs DSLR – Bird Photography (Part 1)’ post asking if I ever followed it up with
a part 2. I wrote that post back in May 2016 so there should probably have been
a couple of follow-ups by now, but I never got around to it. This delay however
means there is certainly plenty to write about now.
I will open by stating the obvious; bridge cameras and DSLRs with big lenses are 'different animals' and not generally intended for the same purpose/market, but they are both used in birding and wildlife photography so there is a point to stacking them against each other. I'll also add the conclusion here so you know where the post is going. Bridge cameras can be excellent tools for long distance subjects, but they are restrictive in terms of conditions in which they perform well and a high-end DSLR with a 500mm or 600mm prime attached will nearly always outperform a bridge camera for long distance photography. As such, I rarely use a bridge camera other than for travelling when portability is a priority. CSC & MILC systems however, have become a little more tempting in recent years.
A few things I won't talk about here as the post will get too bloated are file formats, focussing capability, speed/flexibility in use, low-light performance and video capabilities. They are all relevant, but I'll just say that generally DSLRs come out comfortably on top in all of these except perhaps video where the bridge cams hold up well (and some DSLRs lose continuous autofocus etc).
This isn’t aimed at photographers who have a genuinely
thorough knowledge of the various types of cameras (DSLR, CSC, MILC etc); there will
be little or nothing to learn here so no need for you to waste a few minutes of
your time, unless you really want to have a read through anyway of course. I
wrote the ‘Part 1’ post because hearing (quite frankly, uninformed) people talk
nonsense about big lenses and seeing things which some were writing
online was an all too frequent occurrence. It’s worth clicking on the link on
the first line of this post to see what I was on about in the original post. It
was primarily about focal length and magnification achievable with two
different but both commonly used camera systems - bridge cameras and DSLRs
(plus the lens). The below pic sums it up; the physically larger of the two
camera systems here does not have a longer focal length.
It may seem like I’m excessively ‘talking up’ one system
over the other in the next section but bear with me, it'll balance out at the
end.
I will use the Nikon P900 (not pictured) as the example for
comparison as this is one of the best and most widely used bridge cameras currently available for
wildlife photography and/or twitching. I will compare it to the Canon 600mm f4L
IS II USM lens which is probably the best lens currently available for wildlife
photography (except perhaps for paid setups/hide work), mounted on a 1DX ii.
This is a fairly extreme example but it does illustrate the point.
Bridge example vs DSLR example (prices accurate at time of
writing)
COST £479.00
vs £16,328.00 Bridge camera is approx. 97% cheaper
WEIGHT 899 g vs
5,567 g Bridge
camera is approx. 84% lighter
FOCAL LENGTH 2000
mm vs
600 mm Bridge camera
has approx. 333% MORE focal length
So (and this is something many people fail to get their head
around), when you see ‘Person A’ with a bridge camera and ‘Person B’ with a
large lens taking pics of the same subject from the same distance (at full zoom
on the bridge camera), ‘Person A’ with the small camera may be getting
frame-fillers whilst the long lens ‘Person B’ may be getting only a fairly
small area of the frame filled with the intended subject. I mention weight in
the above stats because most photographers/people cannot handhold a 1DXii with
the 600mm ii lens as they simply don’t have the strength, but hey, tripods,
ledges and fence posts can be very useful!
This is making a bridge camera sound like the obvious choice
then? Well no, far from it. They may be cheaper, they may be lighter and they may
have significantly more reach than a DSLR setup, but they do not produce the
same sort of still image quality. The sensors are not capable of performing
like a larger sensor in a DSLR, and the built-in zoom lenses will not
perform as well as the fixed focal length beasts you can buy for interchangeable
lens systems. In simple terms, bridge cameras have smaller sensors than DSLRs,
many of them being 1/2.3 inch sensors with a few newer models increasing that
size to 1 inch. These small sensors give the cameras a ‘crop factor’ vs full
frame which essentially allows a big ‘focal length’ in a small package. All focal lengths quoted here are in terms of 35mm equivalence; I've written 'focal
length' in inverted commas in places because the lens itself doesn’t achieve this i.e.
the P900 doesn’t have a 2000mm lens but has the equivalent of a 2000mm lens due
to the crop factor of the sensor. This is where the big compromise is. Small
sensors typically gather significantly less
light than larger sensors; a smaller sensor surface area means that the individual pixels must be smaller for the same resolution, and are therefore capable of capturing less photons in a set time period. As everyone who uses a camera should know, light has
a profound impact on the end result. This is also where big lenses come in. A
lot of lenses aren’t ‘big’ because of the focal length (obviously some are, to
an extent), but more so because of the aperture of the lenses. Take the Canon
400mm f2.8L IS II USM compared to the Canon 400m f5.6L for example. They have
the same focal length, yet the f2.8 version is over 3x the weight,
significantly longer and nearly double the max diameter. Herein lies an
incredibly common misconception, that big lenses get you close-up pics. They usually
don’t. Take mine for example; I have a big lens but also have the equal least equivalent
focal length of all the local patch bloggers/photographers here. However, the light gathering benefits of such a lens are profound.
However, focal length isn’t everything. What is the
use of huge focal length if the quality of pics produced is poor? What is the
use of huge focal length if there isn’t much light available and the camera
needs a slow shutter speed that will likely result in blurry images? What is the use of
huge focal length if the photographer is handholding but isn’t very stable? Well,
you simply wouldn’t benefit from more focal length. Tricky photography conditions
lend themselves to cameras with better sensors; they’re more versatile and that
can make all the difference. If you nail a shot on a DSLR and get everything
right with the settings, you should be able to crop out perhaps 80-90% of the
image and still have enough pixels to make use of for websites or small
printing. You may have noticed when I post a pic of something very distant, I’ll
occasionally say something along the lines of ‘this is cropped to show 2-3% of
the original pixels.’ This is something that simply can’t be done well with
bridge cameras yet. Granted, you may have a bigger subject in the frame
straight from the camera, but that doesn’t always translate to the best final
result. The pics below show a full image (DSLR) and then a heavily cropped version which still shows enough detail to be of use:
Another area worth mentioning is quality of equipment, and
the ‘you get what you pay for’ saying does ring quite true here within each type
of camera system. One 400mm lens is not going to get the same results as
another 400mm lens of a different aperture or from a different manufacturer. It’s
a tricky one to balance with DSLRs as some lenses can produce a higher
perceived resolution than the camera body is capable of capturing. This does go
both ways though and a very high-resolution sensor on a camera body won’t produce
very good results if you are shooting through a mediocre lens. In
basic terms, interchangeable lens camera systems are not simple and thought
needs to go into what will be the best combo of body and lens to suit your specific
requirements. On the subject of quality, if you manage to get a shot composed as you want where no cropping is required (i.e. the subject was very close in the case of wildlife, or if you are going for a scenic/habitat shot), then the quality with a decent DSLR & lens will blow away what is achievable with a bridge camera. Every time. The sensors are simply that much better due to their size and light gathering capabilities. In reality though, it is rare that the original shot from a DSLR will be close enough unless it was a set-up type situation; that's just part of the challenge with wildlife photography.
Perhaps the most significant factor when considering impacts on results from all types of camera systems is knowing your equipment and knowing how to use it effectively in different scenarios. Take pics of the Moon for example, whether taken on a bridge or DSLR type camera. A quick
look online will show massive variation in quality of pics from the same type of
camera in the hands of different photographers with the main reason being some know
how to get the most from the equipment they have, and others don’t (although an immeasureable caveat of this is that not all gear is made equal and two versions of the same model may not produce the same results in the same hands). Have a play
around with manual settings rather than relying on auto modes. Play around with
ISO settings to see what you are personally happy with as a limit. Play around
with different apertures to see the changes it makes to depth of field and consider how you may use this to your advantage. Play
around with shutter speeds to see how still you can hold the camera in case you
need to use it when light is poor.
I suppose I need to conclude this in some way, so I'll end with saying that modern cameras are brilliant and
photography can be very rewarding, whether you use it for blogging, social media, business or
simply for your own personal records. Both bridge cameras and DSLRs have their own set of advantages & disadvantages for wildlife photography and this post is a long way from exhaustive of these (it's already long enough). In terms of the 'mutt's nuts' a £15,000-20,000 + DSLR setup will achieve the best results in most circumstances (in the right hands), but the value & performance for money you get with bridge cameras is incredible. To get close to the performance of a £400-500 bridge camera like the Nikon P900 for very long distance subjects, you will likely need to spend well into four figures on a DSLR system. However, for anything that doesn't require close to full zoom, bridge cameras will lose out.
P.s In part 3, APS-C vs Full Frame sensors within the DSLR category needs to be covered in more detail, as do the different types of interchangeable lens systems. I have
a friend who has recently switched from DSLRs to MILCs (mirrorless interchangeable lens cameras, an area that is advancing rapidly) and know some local people who
have also made the same switch. I’ll see if I can persuade someone to write a
guest post for me with a few pics to help show advantages/disadvantages of each
system. This still isn't exhaustive of course, with digiscoping and other options out there! Hopefully I won’t leave it almost 2 years for the follow-up post this
time…
