David Allen
Member
They all have more or less the same SBR
How do you come to this assumption? - I suppose that it is because I have a certain look that I like for my exhibition prints and this is perhaps what is fooling you?
Although I do not generally take notes of exposure, with this image:
http://m3.i.pbase.com/o6/45/376345/1/148305013.cO1O4PeG.PraterGarten12012.jpg
I remember the shadow area read 8 on my Weston meter which, when placed on Zone III, gave an exposure of 1/15 @ f16. This led to the white wall falling on Zone X. However, using the two-bath developer, the white wall was controlled and prints as a very light grey with texture with no need to change grades.
In this image:
http://m8.i.pbase.com/o9/45/376345/1/155159818.pt2fbZYI.2013_dsall_graben.jpg
The area under the under the petrol station roof measured 11 on the Weston meter giving an exposure, when 11 was placed on Zone III, of 1/125 @ f16. This led to the white wall falling on Zone VII but can be rendered in the print as much nearer Zone VIII without needing to resort to Grade 5.
So, as you can see, your assumptions about subject brightness range in my photographs are completely wrong.
The only variable in these prints is the sky, and it is all over the place.
I do not know where you live but the sky in Europe varies a lot throughout the day. In addition, I generally choose how I want my skies to look based on the photograph. I was honestly not aware that there was an official tone that skies should have - seems like I have transgressed an unknown rule.
. . . .and alleged magic tonality.
I do not recall writing that BTTB developer (or any other developer for that matter) produces magic tonality but rather that it delivers results that other posts suggested that it could not. Now in the first example image I would question whether a conventional developer could have held this subject brightness without adjusting the development. Given that the second example image could well have been on a roll with a similar image with similar subject brightness range then adjusting development to suit the first image would have negatively impacted on the second one. This is not the case, in my experience, when using a two-bath developer - oh by the way, have you ever actually used a two-bath developer yourself?
Gerald Koch and I rarely see eye-to-eye. Nevertheless, he makes his comments in a cogent manner and states what he believes to be correct information for the benefit of other people on APUG. Geralds comments about Sandy Kings article are fair in that his testing methods were not scientifically sound and it lacked the references that one would expect from an article presented as a technically specific revue of a certain methodology. The fact that many people do not adhere to good practice (or worse, actually knowingly produce texts that are wrong, deliberately misleading or comprising entirely of gobbledegook) does not change what one should expect from a serious scientific paper.
Rudeofus you seem to want to rubbish what either Gerald and I have to say. Why one would want to do this is a great puzzle to me. Given that over 1,000 people have viewed this thread and I assume that some of those are either beginners or people seeking to approve the technical aspects of their photography, I do not think your comments are either helpful or particularly appropriate to the aims of APUG - which I believe to be providing information (subject to each contributors experience and knowledge) that may be of benefit to other analogue photography enthusiasts.
Bests,
David.
www.dsallen.de