Originally posted by WPRESTO Outstanding
Are you available to take my pictures for me?
For a fee, sure!
Originally posted by rayallen And it deserved to make Explore. Don't know how you do it hand held.
Thanks! I suspect your question (how I do it) might be rhetorical, but see below...
Originally posted by Geodude Never having tried focus stacking, just how do you get an insect to sit still for eight shots, and do you focus by tweaking the lens 8X, or do you simply move back and forth very slightly? Not being facetious, I'm just curious to know the technique...
Well, it's not easy! But here are the basics. Since I (usually) have a diopter on my lens, changing the focus on the lens actually changes the magnification of the shot, so that's not how focus is achieved at all. The lens is pre-focused to pick a magnification based on the critter I am shooting and the type of shot I want. I use magnified liveview with focus peaking and the camera is set to shoot Continuous High (i.e. 8.3 fps on the K-3). It's good (read almost essential) that the critter be low to the ground, which allows me to kneel and put an elbow on my knee or outright lie down and put my elbows on the ground. I then very slowly move in. I usually fire off a single frame with the eyes (hopefully) in focus to (again, hopefully) have something should the critter be skittish and fly away after the first shot, which often happens. If the critter doesn't fly away and my exposure is good (remember, I'm shooting full manual), I then move in a little more so that focus is a little past the eyes. I may or may not rehearse the (very small) movement needed a couple of times, and then I fire a volley moving slightly backwards. Eight frames takes about one second, so I hope the critter doesn't move significantly during that time!
I'm using a li-ion flash, which can keep up with the K-3 for 10-15 frames at low power levels. If the critter doesn't fly away, I will fire 4-5 more volleys with similar framing, if I can. I often find that my first volley has a systematic movement that moves the critter progressively out of the frame as the shots are fired, so if that's the case, I try to correct that in the next volleys. If the critter is cooperative and photogenic, I'll shoot a ton of frames and maybe vary the angle and the magnification. For the bee I last posted, I shot 153 frames in all. Often with bees, even if you're lucky and find them as they're taking a rest/nap, the flash will eventually wake them and they'll fly way, which is what happened here. (I might publish a second shot from that session as I have other angles that might be stackable which I've yet to process, but I'm very happy with that "one" shot.)
BTW, I wish the K-3's liveview didn't automatically turn off magnification on shutter half press. That is endlessly annoying. (Maybe there's a setting for that?) Anyway...
Once back home I will review the shots and make lists of candidate volleys for stacking, based on framing & composition, on relative lack of movement of the critter, and relative lack of movement of the critter within the frame as I was shooting (ie did I back up in a straight line). I will then usually try to stack several of the most promising candidates, and then compare the stacks. I use Zerene, BTW. Flaws mostly become apparent then, such as when I moved too fast and there are zones out-of-focus (or just less in focus) in between the stacked areas of focus. The stacking software also doesn't always get everything right, and sometimes you have to go in after the fact and correct the choices it made. The best stack then goes through my usual post-processing... And that's it, in a nutshell!
Here's a five-frame focus stack:
And a single-frame shot!