Back to the grindstone (pics)

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Was bored this evening and decided to break out the NX20 with 60 mm f/2.8 Macro. IMAGE(http://dpzen.com/dpzattaches/dpzattachesi//201409231905293956.jpg) IMAGE(http://dpzen.com/dpzattaches/dpzattachesi//201409231905313957.jpg) (blur on finger from vibrations) IMAGE(http://dpzen.com/dpzattaches/dpzattachesi//201409231905323959.jpg)

First one's a winner!

Yep, the first one is best! Eric, I hope your 60mm front element was fitted with some sort of sacrificial filter, as I've heard stories of grinding sparks making a mess of windscreens, etc.

It is amazing what you see in photos. I understand the sparks are tiny heated particles of metal flying off, but what is the science behind some of them reaching a certain point and then exploding in several smaller trails? I could understand them breaking into smaller parts but why fly off in all directions. There must be some gas expansion involved.

Thanks all! Ian, yes they are fun to watch, almost like mini fireworks. I am not sure what all is involved in the process. They do have quite a lot of energy though as they can bounce around quite a lot. For the filter, I should have probably put a protection filter on, but didn't. If I do more of these I would likely bring out a protection filter as it is a perfect time to use one Eric

Hi! The first one is super - would make a great annual report cover! Really great work. Thanks for sharing

ac146 wrote: Hi! The first one is super - would make a great annual report cover! Really great work.
I agree, the first one is great. Brian

brianj wrote:
ac146 wrote: Hi! The first one is super - would make a great annual report cover! Really great work.
I agree, the first one is great. Brian
yep.....very good....that first one.....

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