Category Scientific

Why can’t I use a ND filter to photograph the transit of Venus?

Summary: Although you can probably use (a combination of) photographic neutral density (ND) filters to reduce the same amount of light as a typical solar filter (e.g. Baader solar filter), it is not SAFE for your eyes as it will not filter out the harmful Ultraviolet (UV) and infra-red (IR) light. The table below shows […]

How big will Venus be in my camera?

Summary: Estimate the apparent image size of the solar disk and Venus in pixels for certain camera and simulate the ideal observed image. Disclaimer: In this post, all discussions are based on the apparent image SIZE of the subjects — solar disk and Venus. I have not discussed any issue of resolving fine details, which […]