T-mount
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The T-mount is a standard lens mount for cameras and other optical assemblies. The usual T-mount is a screw mount using a male 42×0.75 metric thread on the lens with a flange focal distance of 55 mm a
T-mount to M42 mount adapter ring
Soft focus
Videos
In photography, soft focus occurs when a camera lens forms images that are blurred due to uncorrected spherical aberration. A soft focus lens deliberately introduces spherical aberration which blurs f
An image of a bottle with a heavy soft focus effect.
An image of the same bottle, but without soft focus.
Vest Pocket Kodak with 2-element meniscus lens and integral hood
Imagon fitted with f/7.7-equivalent sieve aperture.