Variable stars are generally analysed using photometry, spectrophotometry and spectroscopy. In addition to astrometric data, the MPC collects light curve photometry of minor planets. The photometer has a soft focus to provide excellent photometry, rather than sharp images. Articles on pendulum clocks and photoelectric photometry were deleted. Typically, observations are processed for relative or differential photometry. Detecting binaries with these methods requires accurate photometry. Today, transit photometry is the leading form of exoplanet discovery. Comets studied forward-scattering in SOHO non-thermal C3 coronograph photometry include 96P/Machholz and C/2004 F4 (Bradfield). Imaging also provides more accurate determination of the inclination than photometry does. Using multiple bandpass filters with relative photometry is termed "absolute photometry". The methods used to perform photometry depend on the wavelength regime under study. He published works on optics, electricity, magnetism, meteorology, photography and photometry. Fleming also contributed in the fields of photometry, electronics, wireless telegraphy (radio), and electrical measurements. Classic methods for the quantification of HMF in food use photometry. A number of free computer programs are available for synthetic aperture photometry and PSF-fitting photometry.