Page 51 - Amateur Photographer - August 5, 2017

Tech Talk

TechSupport

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Previewing in mono mode when reviewing raw fi les to HDR halo
produce a mono version, which
on OM-D can be saved in the camera problem © KEITH JONES
Q I have switched from alongside the original raw fi le. Q I realise this
Canon to Olympus and
This can be in any of the picture
now have an Olympus
OM-D E-M1 Mark II. Is it possible modes, including monotone. This is not for
everyone,
is rather fi ddly but it does work.
to preview images in black & but I have a
white? It was possible to do this Screen calibration problem each time
with my Canon – I was able difficulties I try to make a
to check skin tones for each three-image HDR
Q and have hit a wall with use Lightroom or
image I shot. John Smith I am new to calibrating photo, whether I
I am assuming that this is what to do. I bought a Aurora HDR 2017.
a technique you found Datacolor Spyder5 Pro, calibrated The issue occurs
A useful with your Canon, as per the instructions, and sent a whenever the sky
using black & white to check the batch of photos to a professional meets a solid
luminance tonality of colour print lab. The results look object, for example
images? If that is the case, you completely different to what I see a roof, tree or
can simply use raw capture mode on my screen, they are much less mountain. The Keith’s image with strong halo effects
and enable Monotone Picture vibrant and dull. Do you have any object always
Mode. By recording raw fi les, you advice on how I can ensure an appears to have a halo around it. What can I do to eliminate this?
preserve all the colour data accurate calibration? I’ve included an exaggerated example for you (above).
which can be unlocked in Crum (AP forum) Keith Jones
post-processing but the camera
will both preview and review the The whole idea of It’s possible to create extended dynamic range
raw images taken – in greyscale. calibration is to ensure images from multiple frames with bracketed
That does force you to compose A that the colours and tone A exposure, without the heavy effects of a typical HDR
through the camera’s electronic you see on the screen is what mode. I often do this to create a natural-looking result in
viewfi nder or the rear screen in everyone else will see on their anticipation of blown highlights or blocked shadows when
black & white. If you want to calibrated display as well as when shooting in challenging conditions. The key is to not overdo it.
work in colour and only printed on a properly calibrated The more donor images the better, using a generously wide
occasionally check images in printer. However, it’s not as range of exposures. To control the halos effectively, try not to
mono, you can use the raw edit simple as that. The imaging crank up the adjustments when merging the images. I would
also recommend working in raw, if you aren’t already. Of
course, don’t use images that have already had the HDR
treatment in-camera.

application you are using at EOS-M to Micro Four Thirds
either end of the workfl ow must lens adapter
also respect the same calibration
framework. This includes the Is it possible to use a
colour space you are working in Q Canon EOS-M lens on my
and the colour space of the Panasonic Lumix GX80
resulting fi le. I would check to see using an adapter? I can’t seem to
if you are producing fi les with fi nd any. Zeb Childen
Adobe RGB or another extra
wide colour space, like ProPhoto. The reason you can’t fi nd
If your printing service is any such adapters is that
expecting fi les in sRGB, then the A the fl ange back distance
colour mapping will be wrong required to focus an EOS-M lens
and you will get results that you to infi nity on a Micro Four Thirds
describe. If the printing service is body like your GX80 is too short.
expecting Adobe RGB and you The provision of electronic
are sending fi les that are sRGB or control of aperture and focusing
something else, then the result would also be very challenging.
Effective calibration gives a unified colour space throughout your workflow will once again look different. Q&A compiled by Ian Burley

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