On 22/04/2015 13:39, whisky-dave wrote:

8

Most pros don't. When does a wedding photographer need a f2 500mm
lens?

They don't need d3x cameras either and frequently don't use them.


He doesn't so he won't buy one even if one was availble. Can you
shown me such a lens ?

Yes.
Put a telecompressor on one of these
http://www.wexphotographic.com/buy-s...n-ota/p1527790
Less than £1k too.


8

It will resolve about 2/3 arc second so you can work out at what
distance if you want.

Doesn't matter.

Of course it matters, do you not understand basic optics?
Why do you think lenses perform worse at small apertures?



no bump as the mirror goes up
that's what mirror lock up is for or live view.

But you complain about EVFs lagging so live view is no good.

No you use the optical viewfinder as that's what it for.

You can't with live view as the mirror is up and there is no
optical view unless you fit one to the hot shoe which sort of
defeats the idea of an SLR.

That's because you're not meant to use them at the same time there's
no point each has a use. The're no point in using a hot shoe
viewfinder on a SLR. Those that buy such things use them because teh
EVF on cameras is so crap and unusable.

Just because you don't need one doesn't mean others don't have a use for
them, what doyou think they use when under water and you can't see
anything through the pentaprism?

faster response time

slower respone time as you've waiting for the EVF to show the
image you want to capture, which is one of the main reasons
mirroless isnb;t used for sport. You really can't beat the
speed of light you know.

Don't be silly, do you really think the EVF is going to lag the
amount of time it takes to whip the mirror up?

Not relivent as it's teh time it takes the person to react to
what they seen on teh screen.

Its that plus the lag in the system,
The lag in DLSR is quite low and not really significant for most
pros. Cabn you explain what sort of delay such a system has and how
that will seriousl hod, back a pro wedding photographer who'll likely
take 5mins framing the subject. I've done wedding photography before,
you don;t need the worldss fastest camera and lenses. You certainly
don't need a 500mm F2.

The lag in SLRs is slower than in good compact and mirror-less cameras.
It has to be due to the mechanics need to move stuff about that doesn't
move on mirror-less cameras.


its important that its consistant as a good photographer will be
able to predict when the best moment is going to occur and will
press the shutter just before it happens.

yes and with burst firing to make sure. Pre-triggering is mopre
useful anyway.

A good photographer doesn't rely on doing a burst and hoping for a good
picture, he may as well video it and select a frame if that's what he is
doing. You decide when the picture will be best and predict when it will
happen and press the release allowing for the system lag.


But they can!

prove it.

Even the £150 zr800 will do 40 fps in still mode and several hundered in
various movie modes.


The wife's superzoom will do 10 fps in RAW but its only 16
Megapixel.

which one is that then ?

tz40 It will go faster but at reduced resolution.

So, it's not exactly a pro camera is it. and it's a superzoom camera
can't even change the lens so you can't put a 500mm F2 on it. only
goes up to 6400 ISO and relatively tiny sensor. and I can;t even find
any refernece to it being able to do RAW.

That's because I misstyped tz60.


and a fastest shutetr speed of 1/1200 most pro camera go to 1/4000 if
not 1/8000. Even my old 1970s mechanical camera can do 1/1000, and
it'll work without a battery.

But its a focal plane shutter so any movement will create distortion in
the image, this is because the shutter exposes different bits of the
sensor in sequence and the subject can have moved.

shorter time between shots.
Not relivent with burst firing of around 10FPS

At 10 fps the mirror is bouncing up and down at 10 fps, not
much good if you are trying to keep something steady.

You won't use it for steady shots that's what IS or VR are for.

IS doesn't work for high frequency shocks, however to be doing 10
fps the SLR will probably have a shutter speed of about 1/1000, you
won't be able to see the shake unless there are straight lines
which will become slightly bent as the slit crosses the frame.

Pros manage it, when pros shoot fast they want a speed higher than
1/1000.

Yes I have seen the distortion you get, some pros use it artistically,
if you don't like it you can buy lenses with shutters built in but there
is an increase in lag as you have to fully open the focal plane shutter
and then expose the image and then close the focal plane shutter.
There is a corresponding drop in frame rate and more time spent with a
black image in the viewfinder.

It depends on whether the viewfinder is up to the job.

what do you mean by that ?

In a mirror-less camera there is no optical viewfinder so if
its not a good one it can be difficult to use.

yep one of the disadvantages or mirrorless.

Didn't you say you needed to use live view on the lcd screen on
the back, much worse than the evf for most things.

You don't have to in fact most pros don't that's the point.

I see a lot of pros holding the camera above their heads, how do you
think they are framing if not by using live view?

Having said that a good mirror-less camera will allow you to
see and frame stuff that's just too dark to see through an
optical viewfinder.

depends on how the optical finder works doesn't it. If it's too
dark it'll have probl;ems focussing too.

That is exactly the same for any camera,

which is why pros like manual focus too which your tz40 doesn't
have.

TZ60 does.



A year or two ago the opposite was true and optical ones were
better than electronic.

they still are.

Not for all uses.

for the uses most put them to. Another problem with EVF is that they
use a lot of battery power cutting down the amount of shots you can
take.

So does all the extra electronics in pro cameras which is why they tend
to be bigger so they can have more batteries.




I want a Sony full frame mirror-less but I am not prepared
to buy one ATM.

Most pros ise nikon and canon for DLSRs higher end pros
prefer lieca, Hassblad most would laugh at a sony camera for
pro use. Years ago they were good for video cameras now they
make good sensors but that's about it.



Just because you pay £6k for a d3x doesn't mean it takes better
pictures than a Sony a7.

Doesn;t mean the sony A7 is better either.

I never said it was, they are all better at some things than at
others.

and that's why pros tend to still choose DLSRs over mirror-less, or
superzooms. Because for teh majority of things they do they need a
DLSR.

There are very few uses they could just use a compact system camera for,
they just haven't been around long enough for the majority of pros to
get rid of their DSLRs yet.



You can probably get more system parts for it but that doesn't
mean you can't take the same photos in different ways, you just
have to be creative.

there's far less glasss for the sony A7 than the canon or nikon
range.

But you can fit both nikon and cannon glass to the A7. You can even
fit it to a cheap micro 4/3 camera if you want. There are
advantages in having a smaller body, you can fit adapters between
the glass and the body.

and thre asre lots of disadvantages too. If the sony camera is so
good you'd think that they'd make lenses for it rather than relying
on Nikon and canon for a decent lens range.

things that pros won;t like about the A7 Noisy high ISO images
compared to full-frame competitors, Control dials are small, and too
recessed. Subject tracking in continuous AF can be unreliable There
is no silent shooting mode and the shutter is quite loud, especially
for a mirrorless camera.

You have the wrong a7.
have a look at the a7s.

Which pro DSLR has a quite shooting mode? Is it silent like some of the
compact system cameras or just quiet?