Review of the Irix 15mm f/2.4 Lens. Testing the Firefly model wide angle lens. Optically the same as the more solidly constructed Blackstone model. Tested on a Canon 5Ds...
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Testing lenses for coma with a laser pointer star simulator in the daytime. Simple test setup also shows starburst diffraction spikes ...
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Using an ultra-wide zoom lens for architectural photographs. Testing the Sigma 12-24mm F4 DG HSM Art lens on a 50MP Canon 5Ds DSLR for architecture photography...
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Using Tilt/shift lenses and extension tubes for macro photography. How much can you move the focal plane by tilting a lens...
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Using a shift lens at 50mm - adding rise and fall to a standard focal length. Tilt/shift lens use at longer focal lengths. A Mamiya medium format lens used with a shift adapter...
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Samyang XP 14mm f/2.4 / Rokinon Special Performance (SP) 14mm F2.4 lens review - manual focus ultra wide angle lens, tested on the Canon 5Ds 50MP full frame camera, also available in Nikon F mount...
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Review of FoCal autofocus adjustment and calibration software. The software from Reikan automates camera autofocus microadjustment for many Nikon and Canon cameras that have the feature. Works for Mac and Windows and includes additional functions for evaluating some aspects of lens performance....
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Review of the Sigma 12-14mm f4 lens. Ultra wide angle zoom lens tested on the Canon 5Ds. Review looks at the challenges of making effective use of a very wide angle lens and how it performs from a handling, sharpness and distortion viewpoint. Includes a...
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Samyang (Rokinon) 12mm F2.8 ED AS NCS Fish-eye lens review. Using a fisheye lens for more than obvious 'fisheye' shots. Looking at the unique stereographic projection geometry of the Samyang full frame fisheye lens...
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Joining various old lenses together with filter rings and cardboard makes a range of specialist lenses that normally cost thousands of pounds. Simple experiments with telecentric macro lenses....
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