A couple of weeks ago, I presented the results of a lens simulation that I wrote. That simulator ignored phase effects in the frequency domain. I have created a successor sim that used Fourier optics, and is much more accurate in presenting the results of combinations of aberrations. But this simulator has its own set… [Read More]
In photography, and in life, work and joy can, and should, coexist
One of the things that I love about photography forums is discussing things with people with whom I disagree. It’s often a learning experience, and I get to ideas that I would not have arrived at without the argument. Just yesterday, apropos of a discussion where I said that I consider cameras tools to make… [Read More]
Choosing gear for high-magnification macrophotography
For the purposes of this post, I’m defining macrophotography as imaging at greater than life size on the sensor. In my case, that means working between 2× and 5× magnification on a 33 by 44 millimeter sensor, specifically the one in the Fujifilm GFX 100 II. That is a large sensor, so 5× allows printing… [Read More]
On constraints
When I studied partial differential equations, one concept that stood out was the role of boundary conditions. These weren’t optional. They shaped the very nature of the solution. The same differential equation could describe very different phenomena depending on how the boundaries were defined. It didn’t take long before I started seeing boundary conditions in… [Read More]
Visualising lens aberrations — two at a time, Siemens star
In the past few posts, we’ve looked at the visual effects of lens aberrations one at a time. In this post, I’ll expand that to include the compound effects of allowing the aberrations to take place in pairs. In the list of caveats that I posted a few days ago, I mentioned that I am… [Read More]
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