COMA professional ND variable filters

I have a Canon EF lens and i want mount it on a Sony alpha 7 camera. I want make video, so is it possible close diaphragm or reduce brightness without use electric adapters?

Photo adapter for Zeiss surgery microscope

I have a Zeiss surgery microscope with its photo connection but i make pictures with digital camera. Did you have solution?

Focus ring for GoPro with 5.4mm lens + W25A filter

Is it possible realize focus ring for my GoPro modified with 5.4mm lens?

Modify GoPro FULL SPECTRUM with lens change

Is it possible to replace the lens of my GoPro with a less wide-angle?

GoPro for Nikon, Canon, Pentax K, Leica R, Olympus, Sony, ecc. lenses

I would a small size and high quality video camera that will allow me to use camera lenses. Did you have something?

GoPro: broken lens repair

I have a GoPro camera with a broken lens. How do I send it?

GoPro: Beautiful extreme video by supports, mounts and accessories

Can you suggest me a camcorder and its supports to be able to do certain sports that have an angle of view similar to that of the human eye?

HD Video and picture thanks tripod use in ARRAKIS

I bought a camera that makes photos and HD video but I can not take good shots, the images are not sharp. Why is that?

The rising of the Sun seen through the pinhole with focal length 1000 mm

What limits are there using the pinhole?