A few nice used yellow golf balls images I found:

Great balls of... pollen!
used yellow golf balls
Image by macropoulos
No, these are not yellow golf balls 🙂
It's pollen on the stamen of an hibiscus flower (Hibiscus rosa-sinensis), captured at 3:1 macro using Yannis Rigakis's MP-E 65mm f/2.8 1-5x Macro lens and Macro Twin Lite MT-24EX ring flash.

Best viewed Large, On Black.

Canon Powershot G7 review
used yellow golf balls
Image by kevindooley
Subtitle: My own damn fault (Explore)

I had a hard time deciding when I bought a new camera a year ago whether to go with DSLR or "single body". I knew from experience that carrying around a camera that can't fit in your pocket was a pain in the ass, but I also sensed I might be interesting in higher end equipment at some point. I decided on the single body Canon Powershot G7, which I viewed as the best single-body available. (Yes, I bought the best of the tube Sony TVs rather than a big screen and I think my picture is better!) Since some of you may be considering a G9, this review may be still useful.

* Not a lightweight, but can indeed fit in pants pocket (barely).
* Very good landscape photos.
* Absolutely killer macro mode.
* Good battery life.
* Nice "manual" controls, easy to learn and use
* Lens fully retracts
* Incredible dof at f/2.8 in macro mode
* Very good image stabilization, autofocus
* Great digital zoom
* 10MP really helps when cropping

* No swivel screen
* Mediocre DOF at f/2.8 on regular mode
* No RAW (they fixed this--G9 has RAW mode)
* Can only buy a few add-on lenses
* Can only go to ISO200 reliably; built-in flash sucks
* Reliability issues?

The final "con" I don't know who to blame. In the last two weeks the damper on the zoom switch has busted (have seen this complained about elsewhere on web); and autofocus seems to fail now sometimes, which freezes all the other controls and usually means a reboot. All of these problems started when I brought the camera on this golf outing. I put it in the golf cart unprotected and I think I underestimated how much bouncing around there was... Oh well, now I have an excuse to upgrade...

Crawling back in time
used yellow golf balls
Image by Unhindered by Talent
We made a few day trips while staying at Methwold Old Vicarage, the first of which was to Grimes Graves, a large pre-historic flint mining site. For over 1,000 years (starting around 3,000 BC), neolithic folk mined high quality "floorstone" flint below more than 10 meters of chalk. The mining was done using red deer antlers as the primary digging tool (!), and there is evidence of over 400 shafts. The miners typically dug a straight shaft down the the desired flint level, and then dug very shallow radiating shafts (little more than crawl spaces) along the flint seam, with no bracing or support. When they were done they back-filled the mines, leaving a large, dimpled area of land that looks vaguely like a huge green golf ball.

A few of the mines have been excavated, and you can actually climb down into one and get a real feel for the place and the process. You get to wear cool yellow hard hats, which you need - I bumped my head several times in the small spaces. You can see the white chalk marks on the top of Sub-Evil and WeatherGirl's helmets as they descend, evidence of previous wearer's bumping their heads into the chalk walls and ceilings.

All in all a very cool visit!

In some sense they were strip mining the area for flint. With nothing but people power and antlers, however, they couldn't strip too much or too fast. Take that same idea and put the muscle of modern technology behind it, though, and we can rip the top off a mountain.

It was really tough to take photos down in the mine (dark, small, etc.). This is a flash photo down one of the shallow galleries, shot through the bars that keep us from actually crawling down these passages. (No worries for me, but it would be pretty scary to lose a 5 year old down one of these.)

The neolithic miners apparently didn't use any supports for these shafts, which they kept quite shallow for just that reason. (This is probably less than a meter tall.) So the support on the left is a modern addition and not something that would have been here 4,000 years ago.

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