Saturday, February 18, 2012

Weekly Challenge #3 White Plate and Silverware

Now I was given the tip ahead of time, to use a makeshift tent. IT helps get rid of all the reflections of the sky and gives you a clearer picture of the silverware. I will show you my before tent and after tent so you can see what I am talking about.

Before tent


After Tent (and final photos I submitted)




The spoon still has a little reflection, but you can tell there is a vast improvement, I need to work on my tent building skills).


Week #2 Critique-
This one has a three dimensional quality. The right-hand upper charcoal
seems to jump off the page.
Good job!


Alan's Technical Tip of the Day-
The sharpest aperture on your 50mm is likely f/11. However the lens is a good
one and likely nobody will ever see any differences between the different
apertures as to acuity.
As we stop down to the tinier apertures, we gain depth-of-field. However, we
lose acuity. Most think the smaller apertures are the sharpest, they are
wrong.  Everything in photography is a compromise. As we stop down the
blades of the Iris form a smaller and smaller entry pupil. Light rays that
everybody thinks travel only in straight lines, actually attempt to skirt
around the edges of the obstructing blades are slightly driven off course.
We call this phenomenon diffraction. You can forget the why, just believe me
as we stop down to the extremely small apertures (f/16 - f/22 - f/32),
diffraction begins to destroy acuity however we gain tremendous
depth-of-field.
Conversely as we open up to the lager diameter f/numbers (f/1.4 -f/2 -
f/2.8) acuity also diminishes. This happens because the working diameter of
the lens is large forcing the edges (peripheral) to get into the act. The
outer edges of the lens are steep as to their curve. This steepness part,
the edges, fail to focus the light and the resulting image is substandard.
The bottom line is, we try and use the center apertures whenever possible.



Thanks for reading and happy snapping!!!

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