“bokeh” look at:http://www.zeiss.com/c12567a8003b8b6f/embedtitelintern/cln_35_bokeh_en/$file/cln35_bokeh_en.pdf
"Nine rounded diaphragm blades guarantee images with exceptional bokeh" Wherever there are reports about a new camera lens, this sentence is often found. What characteristic of the image is actually meant by it? And what does the diaphragm have to do with it? We would like to address these questions today. But because "bokeh" is closely related to "depth of field," I would like to first begin with those topics on the following pages. It is true that a great deal has already been written about them elsewhere, and many may think that the topics have already been exhausted. Nevertheless I am sure that you will not be bored. I will use a rather unusual method to show how to use a little geometry to very clearly understand the most important issues of ‘depth of field’.
RuthC: Congratulations, Henry, on your well-deserved win in this 'Lichens' challenge. This is a beautiful and unusual example of the subject, with interesting contrast and texture. Ruth :-)
Thank you, I appreciate your comment Henry
Thank You all, I appreciate the kind words.Cheers!Henry
cmantx: Great shot. Nice detail. Amazing that you can get that close to a dragonfly. What time of day was it taken?
The lens to the insect distance is approximately (camera maximum zoom): 12.5” (31.75 cm) with close up VCL3358, ~31” (78.74 cm) VCL3358 + VCL-DH1774~ 20” (50.8 cm) with close up Canon 500D~50” (152.4 cm) with Canon 500D+ VCL-DH1774,~9” (22.86 cm) with close up Canon 250D,~21” (53.34 cm) with Canon 250D + VCL-DH1774.Date created: 5/1 2012, 2.27 PM
merops: Good shot, but why crop so tight?
Picture was capture by Sony HX100v + close-up lense Canon 500D.Photo was not crop, I only rediuse size:„Size: MAXIMUM 1,600px on LONGER SIDE.”CheersHenry
Sorry Ruth I did not see your thread: 'Eat or The challenge 'Eat or Be Eaten' http://www.dpreview.com/challenges/Challenge.aspx?ID=7788
Thank you Cmantx and Niccum, for you kind comments, unfortunately sandbagging is widespread it is an epidemic.
Look at: Challenge DiscussionsThanasaki: Negative Voting DESTROYS "Challenges"
In earlier times, when most people voted honestly on challenges -even when some, wrongly thought that "half star" vote was better than nothing- the best pictures came mostly out as winners. Now, I think, there is a "targeted" low votiing on really good photos, clearly "aiming to destroy" them. I cannot find the right word to describe these "people" doing this, but this really diminishes the fun for participating in Challenges. ... So I'd suggest to DPREVIEW to TAKE ACTION URGENTLY and change the voting system and also quickly procceed to the other changes (as suggested by many and respectful DPReview members, almost a year ago). Let's give again "Challenges" the fun and the prestige (in terms of honesty, good taste and image quality) as it was some 2 years ago.
Thank you all for you kind comments. Henry