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DOFIS: Exposure, Focus and Pano bracketing
Another quick post of one of my 'tabletop experiments, this one showing how, with the help of Magic Lantern and DOFIS, you can easily create complex bracket sets. This one being a three degrees of...
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A poor man's optical bench
As we have seen in previous posts, on a photography lens, knowing the pupil magnification becomes important if you wish to know macro depths of field and the field of view as you change focus, ie FoV...
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Why pano shooters should stop down
In the last post I alluded to the complication that, in many lenses, the pupil 'plane' is in fact a surface, ie it varies as you move away from the optical centre.For most photography, eg portraiture...
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DOFIS: Now for the macro shooters
If you have been following my DOFIS developments, you will be aware that DOFIS provides Magic Lantern photographers and videographers with the best available, in-camera, information, eg:A lens model...
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The Hyperfocal Distance: Understanding the traps
Warning: this post may be heavy going for some, so jump to the bottom line if you wish. In previous posts I hope I have convinced readers that the hyperfocal distance is a very powerful tool for...
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DOFIS: Resolution Figure of Merit
There are lots of ways resolution gets spoken about in photography: the resolution of the sensor; the resolution of the lens; the resolution of the screen on which we are viewing the image; the...
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DOFIS: Resolution FoM tweak
Just a quick post to say I've tweaked the algorithm in DOFIS that provides a figure of merit to show how resolution changes as you adjust focus and aperture.In the latest version, the overall...
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Focusing a Tilt-Shift Lens
WARNING: This post assumes a working knowledge of a Tilt/Shift lens, plus this post is aimed at DSLR Tilt-Shift users, ie not Technical Camera usersIt seems everyone who gets a tilt-shift (TS) lens...
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Further Tilt/Shift modelling
In the last post I introduced TiltSim, a tilt/shift (TS) lens simulator, and showed how one focuses a TS lens that is parallel with the optical axis, eg a camera on a tripod that is parallel to the...
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More about TiltSim
As mentioned in previous posts, I wrote TiltSim as a pre-visualisation tool to help me, and other DSLR Tilt-Shift lens owners, get to know their expensive lens, all from the comfort of their sofa....
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View Cameras vs DSLR Tilt/Shift Lens
In this post I'll be taking a look at the difference between a classic 'View Camera (VC)' or a 'Technical Camera (TC)', ie a VC with additional 'precision' controls, albeit at the loss of a few...
View ArticleSky Replacement: a 150 year old problem
This post is triggered by a recent George Eastman Museum talk, given by Mark Osterman, on "A Photographic Truth", which I thoroughly recommend: https://youtu.be/LbOlsqJpGaEThe talk has real resonance...
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DOFIS: Tilt Calculator
Just a quick post to say I've added in a Hinge distance calculator for Tilt lens users.In the above screen grab, for my 24mm TS-E, we see the Hinge Calculator showing that a tilt of 2.5 degrees gives a...
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Taking the blinkers off your camera
As we know, our camera can see more that we can with our eyes, although all cameras are blinkered by the manufacturers, to suppress the UV and IR bands.Unless you are lucky enough to be doing...
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DOFIS: Plane of Sharp Focus
As DSLR tilt/shift (TS) lens users know, positioning the plane of sharp focus is inevitably an iterative process. However, with DOFIS, Canon Magic Lantern users can get a little help along the...
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More on tilting with DOFIS
As the astute reader will have noticed, I've tidied up my Magic Lantern scripts and have now converged on DOFIS as my only ML Lua script; as DOFIS meets all my needs:'Accurate' lens model, accounting...
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TiltSim 2
In my e-class, 'Getting even more out of Focus :-)' and in the TiltSim simulator, I created a simplified tool to allow Tilt/Shift (T/S) lens users to virtually explore their T/S lenses.The...
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TiltSim 2 and the internodal hiatus!
A quick post on a minor tweak I've made to TiltSim 2.As we know from previous posts, we can successfully model a complex lens by making use of a split/thick lens model, ie:To register a lens in TiltSim...
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A post for all Tilt/Shift Users
Those that have been following my DOFIS and TiltSim developments will be aware that this has been a cathartic journey for me: as I tried to create a Magic Lantern focus tool for my normal and tilted...
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Lens Simulator
As we know, a modern lens is a balance between high precision engineering and optical science. You can't design or make a modern lens without a lot of computational tools, which most photographers will...
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