WPF - World Photography Forum
Home Gallery Register FAQ Calendar Search Today's Posts Mark Forums Read

Welcome to World Photography Forum!
Welcome!

Thank you for finding your way to World Photography Forum, a dedicated community for photographers and enthusiasts. There's a variety of forums, a wonderful gallery, and what's more, we are absolutely FREE. You are very welcome to join, take part in the discussion, and post your pictures!

Click here to go to the forums home page and find out more.
Click here to join.


Go Back   World Photography Forum > Photography Technique > General Photography Technique


General Photography Technique Discussion on General Photography Technique

Reply
 
Thread Tools
  #1  
Old 24-08-17, 19:38
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default White Towel Exposures

My Light level is a bit low but I tried working my Cam Settings off the White Hand Towel anyway.
My ISO is 1250 Manual. My EV is "0" Default, Minus 0.33 and Plus 0.33 in a 3 exposure bracket.
These two are the "0" Default images.
The settings I got from the White Towel I used to do my subject.

I take a 3 image bracket of the White Towel for my Detail and Texture accuracy - along with White Balance Accuracy - as well (with a Magnifying Lupe) - before I do any subject images - also in 3 image bracket.

If the need arises, I can do this as well. I find it most helpful - as it keeps me
from making exposure errors by guessing what exposure I should use -
With a Magnifying Lupe - keep a strong eye on my texture and details of the White Towel - as I change my ISO and or EV - one click at a time - above or below Default "0". This idea helps greatly to keep my exposures accurate.
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.

Last edited by nldunne; 25-08-17 at 13:40.
Reply With Quote
  #2  
Old 25-08-17, 13:42
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

I updated my info in this thread - above
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
  #3  
Old 26-08-17, 13:10
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

I set my ISO Default "0" Manual - by setting ISO to AUTO - and then by pressing the Shutter Button Half way down and noting ISO given - off White Towel - and using that ISO for my image
If I use any EV - Plus or Minus - other than "0" Default, I set my ISO to AUTO and press the shutter button HALF WAY DOWN to find Manual ISO - for each ISO used - and use that ISO for my 3 image bracket.
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.

Last edited by nldunne; 26-08-17 at 13:17.
Reply With Quote
  #4  
Old 29-08-17, 04:13
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

While at Y V R Saturday, I tried an idea- for the first time - from my White Towel.

I first found my ISO on "0" EV - from the AUTO SETTING and Pressing the
Shutter Button Half Way Down. That gave me ISO 640 in the light I had.
Then gave me a choice - use the ISO 640 at EV Plus 0.33 or find the ISO
assigned to Plus 0.33 - which gave me ISO 800.

For these images - I tried ISO 800 - the assigned ISO for EV PLUS 0.33 of my 3 image bracket.

I do like having the option like this - if I am given it. - in low light as a rule.
This ISO example will work on the dark side of EV Default "0" as well - if the light level is a bit too high. Care has to be taken - but it is still better than Guessing how much darkening to use.
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
  #5  
Old 29-08-17, 13:36
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

Another point - working with White Towel - when doing special subjects - like a wedding or similar. I have - Four - subtle choices of settings right around Default EV "0" I can start with. (I would try to go early and do a set of tests in the lighting available - in this case - before any program starts).
1) "0" Default EV at IE ISO 640
2) Plus 0.33 EV at IE ISO 640
3) Minus 0.33 EV at IE 800
4) Default ISO 800
This idea can also be used on the Minus Side of Default"0" - with extreme care
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
  #6  
Old 31-08-17, 14:11
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

An illustration of how a color card can help show color accuracy in the subject - along with the white texture and detail of the white towel. I like the various shades of pink (lower right corner of the card above the grey squares) for a skin check as well.(I wish I had my card in the middle of the towel)
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.

Last edited by nldunne; 31-08-17 at 14:16.
Reply With Quote
  #7  
Old 01-09-17, 14:31
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

For those who like black and white - here is a quick pre main image test image I did. This is under houselights at 1000 ISO Manual (set from White Towel) with NO PP except cropping and rsizing.
This image gives me the opportunity to check ISO, Texture and Detail, Grey Scale Values among other things.
Attached Images
File Type: jpg 002 SX 60 TEST IMAGE.jpg (238.7 KB, 1 views)
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
  #8  
Old 01-09-17, 20:06
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

For anyone interested in seeing how an image shape may look - I tried this test using my 2 VIEW CATCHERS. As close as I could measure my opening, I made my opening - 46.5 (47) x 40.0 cm - which is VERMEER'S - GIRL with PEARL EARRING.
First I locked in ISO at 200 from Towel.
Then, I locked in subject without the View Catchers pressing the shutter button half way down..
Next, I moved the View Catchers in front of Lens and Subject and tried carefully to do the image This is only an illustration of an idea.
Attached Images
File Type: jpg 001 SX 60 WHITE TOWEL TEST THROUGH VIEW CATCHER.jpg (289.2 KB, 2 views)
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
  #9  
Old 08-09-17, 14:31
nldunne's Avatar
nldunne nldunne is offline  
Senior Member
 
Join Date: Nov 2006
Location: North Vancouver, B C Canada
Posts: 19,055
Default

We had hard copies done (of Anne at YVR and water's edge) - the last images done).

I took these hard copies and put them on top of similar colors in my Painting Exhibition Catalogue Images with the same colors. When I put the colors on top of each other, the Red and Blue colors (of my hard copy and Catalogue images) matched the red and blues in some of the catalogue's images - within 1% or 2% of the difference in color, contrast and brightness levels
between them. This closeness really surprised me how close the colors were.

I feel this method can be used to check one's work (and Printing Shop's work) very accurately. I suggest using an Independent Photo Print Shop (or yourself - if you do this work) - not one by mail or in a department store or similar for doing this.
__________________
Norm Dunne

I love the Old Masters for incentive and compositional ideas.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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 Off
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 07:18.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.