A Demonstration of Accurate Wide-field V-band Photometry Using a Consumer-grade DSLR Camera
Brian K. Kloppenborg, Roger Pieri, Heinz-Bernd Eggenstein, Grigoris, Maravelias, Tom Pearson

TL;DR
This paper demonstrates that consumer-grade DSLR cameras can perform accurate wide-field V-band photometry for bright variable stars, offering a cost-effective alternative to traditional equipment.
Contribution
The study develops and tests a color-based transformation method to achieve high-precision photometry using DSLR cameras, showing their viability for variable star research.
Findings
DSLR green channel photometry agrees well with VT photometry.
A reliable color transformation to Johnson V band was established.
DSLRs can be used for accurate wide-field photometry with minimal investment.
Abstract
The authors examined the suitability of using a Digital Single Lens Reflex (DSLR) camera for stellar photometry and, in particular, investigated wide field exposures made with minimal equipment for analysis of bright variable stars. A magnitude-limited sample of stars was evaluated exhibiting a wide range of (B-V) colors taken from four fields between Cygnus and Draco. Experiments comparing green channel DSLR photometry with VT photometry of the Tycho 2 catalogue showed very good agreement. Encouraged by the results of these comparisons, a method for performing color-based transformations to the more widely used Johnson V filter band was developed and tested. This method is similar to that recommended for Tycho 2 VT data. The experimental evaluation of the proposed method led to recommendations concerning the feasibility of high precision DSLR photometry for certain types of variable…
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Taxonomy
TopicsOptical measurement and interference techniques · Remote Sensing and LiDAR Applications · Surface Roughness and Optical Measurements
