Lightnings taking a ride

by ceinmart

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1

The pragmatic answer is: If possible, you make your aperture smaller to achieve the desired DOF. That way you do not trade in resolution. Stepping back and cropping in is equivalent to choosing a longer focal length and stepping back (apart from the resulting resolution). It probably is an unpractical way to influence the DOF. Mathematically, I think none ...


1

Wikipedia has all of the DoF formulae you probably ever need. You may now begin to see why optics is a field of physics unto itself. You aren't going to be able to learn these equations and do them in your head to map an ƒ number to a depth of field in, say, feet. This is why there are so many DoF calculators floating around. I wrote one of many.


2

Hummmm.... well this will be a little bit hard to explain, but if you'll read what I'll link and write then you'll understand it. You are a beginner, isn't it? :-) You want everything to be in focus like you get on a kit lens (18-135 etc). First you must understand the basic notions about Depth of Field (DoF) and Aperture. If you already know these ...


-3

You can switch your AF to "One Shot" Mode. This will prevent continuous focussing. It will focus once you press the trigger halfway and then stay at that focal length until you release and press again.


1

I would use a flash. The intensity of a flash and the extremely short light duration are unbeatable for sharp macro images. However what you want is GOOD flash illumination. What I have used in the past is a box made of white foam core board with a translucent window on one side and an off camera flash fired into the window on high power (although even half ...


1

Take a look at a depth of field calculator. There are fundamental physical limits, so you want to learn what is possible with a perfect lens. You can see what different arrangements can do for you, on paper. The phone is a physicly smaller aperture, so will give a deeper field and better cover the 2 inches. If you scale up your setup to keep the ...


0

You are on the right track. A few things could help here. First would be to get more light in the box. A florescent light typically makes quite poor light. It can be inconsistent in quality and usually isn't all that bright either. Next I would recommend pushing your aperture up to the diffraction limit but not beyond. Your third example image was close ...



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