However the approach has attracted interest for modern electronic image sensors with a flat focal plane which cannot be forced into spherical surface shape, nor even manufactured as such.
For this rather massive photographic survey work, Väisälä developed also a technique of taking two exposures on same plate some 2–3 hours apart and offsetting those images slightly.
When the city grew, together with its lights, the telescope was moved in 1950s to a darker location at Kevola Observatory, some 35 km east of Turku.
The new location is now property of and in care of Turun Ursa Astronomical Association, which is Finland's second oldest amateur astronomy society, and also founded by Väisälä.
Its guiding telescopes are used mostly to watch stars and planets – e.g. a Pluto-hunt every spring, for which the guider is barely big enough to allow the human eye to see it under good seeing conditions.