Here are my first somewhat successful stacks. I would welcome some insight and help on where to go from here as Im still a bit confused. I can tell something is off but im not sure where to start, capture or processing. After experimenting for about 16 hours yesterday and the day before, here is where I’m at. I've been really enjoying this forum and very excited to start down this wonderful rabbit hole!
The following were shot on a Nikon D800 with the 105mm Micro with a Lomo 3,7 x 11 microscope objective attached via a 52mm to rms adapter. Shot on a WeMacro rail and stacked with Helicon Focus using (B,Radius8,Smoothing4)
Based on what Viktor kindly told me my 105mm lens, would get 105/32.8=3.2x magnification.
So I entered that into http://extreme-macro.co.uk/focus-stacking/ focus stack step calculator using f2.8 to get 50um steps. I tried using 180 um backlash and 220 um backlash as the WeMacro instructions were conflicting. I also experimented with the um a bit.
Here are the resulting images and settings. They are unedited except for white balance and cropping out the vignette from a lack of coverage on full frame. Any guidance would be appreciated.
First Stacks with Lomo 3,7 x 11 need guidance...
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Re: First Stacks with Lomo 3,7 x 11 need guidance...
They look pretty successful to me
The two things to keep under control are
1) lighting diffusion. You have discovered how light you probably thought was pretty flat, gives you a contrasty image. It's a good exercise to first use multiple flashes, or diffusers and reflectors, to get it as absolutely flatas you can. It's hard. Then you can add or take away a little to see how far off flat, gives you the modelling you want.
2) vibrations. If you use flash at this magnification it shoudn't be a problem, but DO peer hard at pixel level, to see if there's the slightest sign of things jumping about, or being blurred.
The two things to keep under control are
1) lighting diffusion. You have discovered how light you probably thought was pretty flat, gives you a contrasty image. It's a good exercise to first use multiple flashes, or diffusers and reflectors, to get it as absolutely flatas you can. It's hard. Then you can add or take away a little to see how far off flat, gives you the modelling you want.
2) vibrations. If you use flash at this magnification it shoudn't be a problem, but DO peer hard at pixel level, to see if there's the slightest sign of things jumping about, or being blurred.
Chris R