Her name is Jen and is a very creative person. When I met her for the first time, she was into glass blowing. She and my son came down for his sister's (My daughter, naturally!) wedding. She was quite interested in my cameras I was using Nikon's, so I let her take my backup camera, a D-70S with a 28 to 70 zoom. I explained all about shutter and aperature, etc. but said she should use Auto. At the end of the wedding she showed me what she had shot and I was flabbergasted.

Well, long story short, I gave her my D-70S and a couple of lenses I didn't use anymore. 5 years later, she has a business, and a growing clientele. Oh, and a whole lot of cameras....she just bought a new one a few months back, but don't remember which one...I know it was 4 or 5k for the body. Beyond me! I still use the 7000 and the D200 for back up.

Anywho, as you will see, she is quite creative. The boys are my Grandson's, Revin, on top touching the moon, and Soren on the ladder.

Enjoy!

My service dog Husker! Without him I would be limited with what I can do in big ways. He is always by my side waiting to help and making me smile! He is charming, sweet and very intelligent. My heart saddens knowing I'm saving money for the next SD I will need to replace him. He is not quite 5 years old but time has gone by so fast and continues to do so which leaves me with the reality that before I know it I will have to train another like him. It took him 2 years to earn his jacket to go out in public. However, he was ready long before that by helping me at home. His youthful eagerness being out in public and just being a happy labby made it hard until he was 2 to work outside the home. We had the most wonderful AKC trainer ever!! Husker is going to have a hard time watching another pup interact with me and if it means breaking his heart I am not going to do it until after he passes. He doesn't like the new German Shepard puppy next door or should I say he doesn't give him the time of day. Husker isn't ever aggressive but makes its clear he doesn't like it when I pay attention to the puppy. When we are out and about he is allowed to say hello to another puppy he is all too thrilled and loves the interaction, its very rare that this is allowed.. It will make life harder for me once I have to retire him but hopefully that will be at least 7 years from now. IDK it all depends on his health and I pray nothing pops up with him more so than he has already had to deal with. Anyhow, he is a ham always wanting to please! IF you have any critiques of this picture, lighting, clarity, DOF, anything, PLEASE pass them my way!!

Here are a few more images from our trip to Mongolia this September. I appreciate all the great feedback from you!

1,2,3 are photos of different eagle hunters
4 is Aisholpan Nurgaiv, "The Eagle Huntress"
5 is a fun event at the festival where a man and a woman is in a horse race where she beats him with a stick. It is all in fun and they usually kiss at the end.
6 is my favorite eagle hunter in full fur hunting clothes mounted on his horse
7 our camp at Khoton Khurgan Lakes
8 early morning at our Ger in the Altai Tavan Bogd Mountains, just before my horse ride into the mountains (about 10 degrees outside)

Enjoy...Dave

Well, actually it is, or is it?

Let's get our brains working this morning with this poser. I've seen a number of comments on this site regarding using small f-stops and diffraction. The typical, don't use small apertures because that causes diffraction. So, what is diffraction? Diffraction of light occurs when a light wave passes by a corner or through an opening or slit that is physically the approximate size of, or even smaller than that light's wavelength. I've added the bold to emphasize the size required. So how big are those sizes?

Visible light has a range of wavelengths of 400 - 700 nanometers. Whoa, how big is a nanometer? It's .000000001 meters or .000000039370 inches. So 400 - 700 nanometers is .0000004 - .0000007 meters or .000015748 - .000027559 inches. These dimensions are quite a bit smaller than any apertures we're using with our cameras.

So getting back to our original statement, f/16 is actually equal to f/16. But, that's because f-stops are ratios. What isn't the same is the diameter of the aperture from one lens focal length to another. For example, let's take two lenses, In this case, we'll examine two Schneider-Kreuznach lenses of focal lengths 150mm and 210mm. At f/16 the aperture opening is:
150 - 9.375mm
210 - 13.125mm

Obviously, a large difference in aperture diameters, but the same f-stop. However, neither is close to the wavelength range of visible light.

Since diffraction occurs as stated above, neither of these measurements are close to the dimensions required to meet the above conditions. So, how would light know which lens it's passing through? Oh, and if you want to make an issue of the "passing by a corner", well, that corner exists at every f-stop, other than perhaps the greatest opening.

The conclusion of this could be that we're parroting some misinformation, making a blanket statement that doesn't cover all situations, or we may be concerning ourselves needlessly. If diffraction does occur, is it observable in our photographs?
--Bob