Olympus UK E-System User Group
Olympus UK E-System User Group

Join our unique resource for Olympus Four Thirds E-System DSLR and Pen and OM-D Micro Four Thirds photographers. Show your images via our free e-group photo gallery. Please read the e-group.uk.net forum terms and conditions before posting for the first time. Above all, welcome!


Go Back   Olympus UK E-System User Group > Cameras, lenses and system accessories > Camera conference > Micro Four Thirds > Olympus OM-D E-M10

Olympus OM-D E-M10 The smallest and lightest Micro Four Thirds camera from Olympus with an integrated Electronic Viewfinder

Reply
 
Thread Tools Display Modes
  #1  
Old 9th February 2015
MargaretR's Avatar
MargaretR MargaretR is offline
Full member
 
Join Date: Jan 2014
Location: South Lanarkshire
Posts: 788
Thanks: 230
Thanked 176 Times in 117 Posts
Likes: 82
Liked 382 Times in 145 Posts
Setting custom WB via grey card

So I'm trying to set a custom (one touch) WB using a grey card, and the EM-10 is having none of it.

This is my newly-IR-converted EM-10, with which I'm now experimenting. Apparently for this particular IR filter, WB on a grey card is recommended, but I can't get the camera to 'take' it. All I get is the "X WB no good" message.

The card was in bright sunlight; I've tried over-exposing by 1, 2, 3, 4 and 5 stops (the maximum, it seems); I've upped the ISO; I have the aperture wide open at f2.8. Still, it doesn't want to know.

I've successfully done the WB on a white card, and on green grass, so the system does work ... just not with grey.

Any suggestions, anyone?

Or am I doomed to have to carry and include a grey card in every shot I ever take?
__________________
Margaret

my Website ; my Flickr ; my Facebook
Reply With Quote
  #2  
Old 9th February 2015
Ricoh Ricoh is offline
Full member
 
Join Date: Apr 2014
Location: Lancashire
Posts: 5,734
Thanks: 589
Thanked 416 Times in 368 Posts
Likes: 782
Liked 1,895 Times in 1,131 Posts
Re: Setting custom WB via grey card

At what wavelength range does the converted camera operate?
I suspect it's what's termed 'near IR'. IR is sensitive to temperature, isn't it?
__________________
Steve

on flickr
Reply With Quote
  #3  
Old 9th February 2015
MargaretR's Avatar
MargaretR MargaretR is offline
Full member
 
Join Date: Jan 2014
Location: South Lanarkshire
Posts: 788
Thanks: 230
Thanked 176 Times in 117 Posts
Likes: 82
Liked 382 Times in 145 Posts
Re: Setting custom WB via grey card

It's a 590nm filter. Other than obviously not being 'visible light' I have no idea how that impacts anything in terms of settings.
__________________
Margaret

my Website ; my Flickr ; my Facebook
Reply With Quote
  #4  
Old 9th February 2015
Graham_of_Rainham's Avatar
Graham_of_Rainham Graham_of_Rainham is offline
Administrator
 
Join Date: Nov 2007
Location: Rainham
Posts: 7,990
Thanks: 630
Thanked 918 Times in 710 Posts
Likes: 2,214
Liked 1,557 Times in 892 Posts
Re: Setting custom WB via grey card

There are several Inks & Dyes that absorb near IR while appearing to produce the required colour in "daylight".

They are used a lot in ID cards where scanners can see hidden patterns using IR light.

You may have a grey card that absorbs IR making it look black to the sensor

http://www.hwsands.com/category/26.aspx
__________________
Graham

We often repeat the mistakes we most enjoy...
Reply With Quote
  #5  
Old 9th February 2015
Graham_of_Rainham's Avatar
Graham_of_Rainham Graham_of_Rainham is offline
Administrator
 
Join Date: Nov 2007
Location: Rainham
Posts: 7,990
Thanks: 630
Thanked 918 Times in 710 Posts
Likes: 2,214
Liked 1,557 Times in 892 Posts
Re: Setting custom WB via grey card

You could always ask about something like these as they are plastic.

http://www.7dayshop.com/products/7da...gc-b-7DSMQDG-B
__________________
Graham

We often repeat the mistakes we most enjoy...
Reply With Quote
The Following User Says Thank You to Graham_of_Rainham For This Useful Post:
MargaretR (9th February 2015)
  #6  
Old 9th February 2015
MargaretR's Avatar
MargaretR MargaretR is offline
Full member
 
Join Date: Jan 2014
Location: South Lanarkshire
Posts: 788
Thanks: 230
Thanked 176 Times in 117 Posts
Likes: 82
Liked 382 Times in 145 Posts
Re: Setting custom WB via grey card

Quote:
Originally Posted by Graham_of_Rainham View Post
You could always ask about something like these as they are plastic.

http://www.7dayshop.com/products/7da...gc-b-7DSMQDG-B
Thanks Graham. I was looking at something similar on eBay ... worth a punt at 2.59 anyway. My grey card is a Jessops roughly-A4-size one, which is supposedly standard 18%, but to my eyes does look rather dark. It certainly seems too tinted for the EM-10, which does carry a health warning about things "too dark or too tinted" to be captured as WB.

Everything is a learning curve!
__________________
Margaret

my Website ; my Flickr ; my Facebook
Reply With Quote
  #7  
Old 9th February 2015
Graham_of_Rainham's Avatar
Graham_of_Rainham Graham_of_Rainham is offline
Administrator
 
Join Date: Nov 2007
Location: Rainham
Posts: 7,990
Thanks: 630
Thanked 918 Times in 710 Posts
Likes: 2,214
Liked 1,557 Times in 892 Posts
Re: Setting custom WB via grey card

This looked "interesting" and may be of some use.

http://www.davidclapp.co.uk/blog/vie...s-in-lightroom
__________________
Graham

We often repeat the mistakes we most enjoy...
Reply With Quote
The Following User Says Thank You to Graham_of_Rainham For This Useful Post:
MargaretR (9th February 2015)
  #8  
Old 9th February 2015
stoates stoates is offline
Full member
 
Join Date: Jun 2010
Location: Findhorn
Posts: 573
Thanks: 277
Thanked 102 Times in 94 Posts
Likes: 23
Liked 148 Times in 55 Posts
Re: Setting custom WB via grey card

Hi Margaret. To set custom WB on my E-5 I have to use a white target, not a grey card. If it doesn't find white I get a fail message that may be similar to yours. I know you have tried using a white source, did you test the custom WB with your filter afterwards to see how it looked? I find that regardless of using a custom WB with my 8 stop ND I still require further manipulation in LR to correct the colour.
__________________
Steve

E-M1 Mk II, E-5, E-510, 9-18mm f4-5.6, 14-54mm f2.8-3.5 II, 50-200mm f2.8-3.5 SWD, 5omm f2, EC-14, 14-42mm, 40-150mm, Velbon GEO E640L/PHD64Q, METZ 48 AF-1

http://www.flickr.com/photos/stoates/
Reply With Quote
  #9  
Old 9th February 2015
Invicta's Avatar
Invicta Invicta is offline
Full member
 
Join Date: Nov 2007
Location: Third rock from the sun
Posts: 1,007
Thanks: 66
Thanked 237 Times in 120 Posts
Likes: 15
Liked 73 Times in 44 Posts
Re: Setting custom WB via grey card

On my IR converted camera I use an area of green grass to set the custom white balance.

Then I use Olympus Viewer software for the initial conversion as, unlike Lightroom, Olympus Viewer can read the custom white balance setting.
Reply With Quote
  #10  
Old 9th February 2015
MargaretR's Avatar
MargaretR MargaretR is offline
Full member
 
Join Date: Jan 2014
Location: South Lanarkshire
Posts: 788
Thanks: 230
Thanked 176 Times in 117 Posts
Likes: 82
Liked 382 Times in 145 Posts
Re: Setting custom WB via grey card

Quote:
Originally Posted by stoates View Post
Hi Margaret. To set custom WB on my E-5 I have to use a white target, not a grey card. If it doesn't find white I get a fail message that may be similar to yours. I know you have tried using a white source, did you test the custom WB with your filter afterwards to see how it looked? I find that regardless of using a custom WB with my 8 stop ND I still require further manipulation in LR to correct the colour.
Yes, neither the white WB nor the green WB is giving me what I think it should look like, at least according to the sample images from this filter on the conversion company website. I did anticipate further work in LR, and/or even a custom DNG profile, but I do want to try and get the WB as good as possible to start from, and I just feel I'm not there yet. Further messing about to be tried yet..
__________________
Margaret

my Website ; my Flickr ; my Facebook
Reply With Quote
  #11  
Old 9th February 2015
MargaretR's Avatar
MargaretR MargaretR is offline
Full member
 
Join Date: Jan 2014
Location: South Lanarkshire
Posts: 788
Thanks: 230
Thanked 176 Times in 117 Posts
Likes: 82
Liked 382 Times in 145 Posts
Re: Setting custom WB via grey card

Quote:
Originally Posted by Invicta View Post
On my IR converted camera I use an area of green grass to set the custom white balance.

Then I use Olympus Viewer software for the initial conversion as, unlike Lightroom, Olympus Viewer can read the custom white balance setting.
Ah, there's a thought. I have Olympus Viewer installed, but have never actually used it very much time to have another look. Thanks!
__________________
Margaret

my Website ; my Flickr ; my Facebook
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
MySet custom settings best set to a mode dial setting? BDennis Olympus OM-D E-M1 3 3rd December 2013 08:44 AM
Grey Balance Card query heyjoe General accessories 1 2nd June 2012 09:25 PM
Custom straps francois General accessories 2 22nd May 2011 11:51 AM
HELP! custom setup Roberta Software 2 5th March 2011 01:08 PM
Free grey card/lens test chart in uk mag bammo General accessories 5 12th December 2007 09:07 AM


All times are GMT. The time now is 12:54 AM.


The Write Technology Ltd, 2007-2019, All rights reservedAd Management plugin by RedTyger