PLA pinhole lens with Metal Adapter for Sony, Nikon and other cameras for educational, and artistic useDesigned by DIY Imaging in United States of America
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If you already have a Microscope Objective adapter, you only need the PLA part. Select "PLA-Lens Only" option to omit the metal parts and save cost The PLA part is now offered as an option of th…Read More…
If you already have a Microscope Objective adapter, you only need the PLA part. Select "PLA-Lens Only" option to omit the metal parts and save cost
The PLA part is now offered as an option of the metal microscope adapter: https://www.tindie.com/products/mbe2001/metal-microscope-macro-set-for-sony-and-more/
A modular pinhole lens, consisting of:
Camera and tripod are for visualization and are not included.
Pinhole lenses are fun. However, working with one usually requires building a box and developing photo paper in a darkroom they. This lens can be used with a digital camera.
Focal length for Different cameras (Do not use with C-MOUNT cameras - the sensor size if too small).
|Sony E-Mount||18||29 mm||49 mm||69 mm|
|Canon EF-M||18||29 mm||49 mm||69 mm|
|Nikon F-Mount||46.5||57.5 mm||77.7 mm||97.5 mm|
The pinhole size of 0.3mm is optimal for f=67mm, and the f# is 223.
Pinhole Cameras have infinite depth of field, have zero geometric distortion, and have very large f# making them suitable to image very bright objects (e.g., the Sun*) However, the image for ANY pinhole lens used on a digital camarea will be VERY blurred and need to be significantly reduced by size by a factor of approximately 8 to 12 to get a reasonable image - which will still be soft, like the example images on this page.
The reason is that even for the optimal pinhole size, the blur will be the size of the pinhole 0.3mm in this case. For a 5 micron pixel size that is 60 times larger than the pixel size. The pinhole size cannot be made much smaller, because the diffraction blur will increase. For a 0.3mm pinhole size the diffraction blue equal the geometric blur (= pinhole size) at 67 mm, which is the optimal focal length for this pinhole size.
Images above were reduced from 3008 pixels to 400 pixels. Photoshop "Levels" and "Unsharp-Mask" were used to enhance the images. Using Levels is recommended, using "Unsharp Mask" is a matter of personal taste
* WARNING: DO NOT** look at the directly at the sun through the view finder of any camera.
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